JPS60197150A - Printed motor - Google Patents

Abstract

PURPOSE:To suppress the heating of a commutator by interposing and holding the inner peripheral edge of an armature between a rotor hub and the commutator. CONSTITUTION:A disc-shaped rotor R of a printed motor is composed by connecting an armature coil 20 and a commutator 21 formed separately and interposing and holding the coil 20 between the commutator 21 and a rotor hub 22. The coil 20 is formed by integrally forming a linear portion 20a for generating a rotary force by pressing one thin plate and the arcuate-shaped first and second linear conductors 20b, 20c, and laminating them through insulating sheets 23. The inner peripheral edge of the commutator 21 is engaged through an insulator 24 with the outer periphery of the sleeve 22a of the rotor hub 22. Thus, the linear portion 20a of the coil 20 can be increased in length to obtain a large rotary force.

Description

DETAILED DESCRIPTION OF THE INVENTION 1. Technical Field The present invention relates to a florint motor, and particularly to an improvement of a disc-shaped rotor.

[Technical Background 1 - For example, a general print motor 1 cuts the magnetic flux emitted from the magnet 1-1 as shown in Fig. 1. A commutator 3 (the one shown is an integrally molded amateur coil and commutator) is connected to the commutator 3. The radially inner part of this armature 2 is the commutator 3. Both of these rotors are collectively referred to as a disc-shaped rotor r') and a brush 4.

The magnet 1 is fixed on the disc inner surface of the B bracket 5B on the anti-load side, which together with the A bracket 5A on the load side constitutes a flat cylindrical cushing 5. The center of the A bracket 5A has a male threaded portion. A rotary shaft 6 having a diameter of 6A is installed, and this rotary shaft 6 is rotatably supported by a bearing 7 made of a sintered oil-impregnated alloy.Furthermore, this rotary shaft 6 is fixed to a U-ta hub 8, The rotor hub 8 is fixed to the armature using adhesive or the like.A rubber rocker 4) port 9 is connected to the B bracket 5B.
=j, and a brush locker 10 is inserted into this locker the boat 9. Inside this brush locker 10, a brush 4 resiliently repelled by a spring 11 is provided so as to be movable forward and backward.
is in contact with the surface of

Here, the disk rotor r is formed by punching a large number of thin strip coils 12 radially into a copper cup disk using a press, as shown in FIG. 2, and then forming the thin disk as shown in FIG. A plurality of coils are laminated with electrical insulators 13 interposed therebetween, and the ends of the strip coils 12 on each floor are connected by TIG welding or the like to form one closed circuit. (Jitsukai Showa 5
(Refer to Publication No. 6-40,477) ``Problems with the prior art'' In such a print motor, since the armature coil 2 and the mutator 3 are formed using a single strip coil 12, the mechanical The temperature of the commutator part, which receives not only frictional heat but also electrical heat, tends to rise.
This is an obstacle to improving performance such as motor output.

Furthermore, this strip coil 12 is formed using a thin plate of about 0.3II1m in order to facilitate punching with a press, but for this reason, the portion of the commutator 3 that the brush 4 comes into sliding contact with must also be thin. .

The brush 4 that comes into contact with the commutator made of such a thin plate material must naturally be made of a soft material such as graphite or graphite to protect the commutator. The voltage drop, so-called brush drop, becomes large, which becomes an obstacle to improving motor output.

Furthermore, when the outer diameter of the disc-shaped rotor is regulated, the amateur filter 3 that generates the Tanabata rotational force is installed inside the amateur coil 2. The length A of the section is reduced by this commutator. Therefore, if an attempt is made to improve the motor output, a certain structural limit will arise. Furthermore, since the length of the communication data cannot be made smaller than necessary, the circumferential speed of the brush 4 and the communication data 3 increases, and the noise becomes louder.

[Purpose of the Invention] The present invention was made to eliminate such defects, and the purpose is to eliminate various elements that are an obstacle to increasing the output of the motor, and to provide a high-performance motor. Tozuru.

[Structure of the invention] In order to achieve the above object, in the present invention, amateur 7 consisting of a band-shaped coil and stain 1 data are formed on the side surface of a disc-shaped rotor, and this disc-shaped rotor is connected through a rotor hub. In a print motor that is attached to a rotating shaft,
The invention is characterized in that the inner peripheral edge of the armature is held under pressure by the rotor hub and the fan mutator.

Examples] Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 4 shows a disk-shaped rotor R of a print motor according to the present invention.
FIG. 5 is a longitudinal sectional view of the disc-shaped rotor, and FIG.
The same members as those shown in FIGS. 1 to 3 are given the same reference numerals.

To summarize the present invention, the armature coil 20 and the fun data section 21 are constructed separately, electrically connected, and molded into one disc-shaped rotor R. By making the length A of the anti-t7 coil 20 longer and reducing the radius B of the sliding portion of the brush of the mutator 21, it is possible to reduce the circumferential speed in the motor output direction. Etoshitachinoguru.

This disk-shaped rotor R has an armature coil 20, a commutator 21, and a C
A rotor hub 2 that holds the armature coil 20 under pressure
2.

This armature coil 20 is made by pressing a single thin plate, and includes a straight part 20a that cuts the magnetic flux emitted by the magnet 1 to generate rotational force, and this straight part 20a.
A first linear conductor 20b (hereinafter referred to as the 139th line conductor 20b) having an arc shape extending outward from the tip thereof, and an arc shape extending inward from the inner end of the straight portion 20a. The second linear conductor 20c (hereinafter simply referred to as the second conductor 20G) is molded at the same time, and as shown in FIG.
Stack 4 sheets through 3, connect the inner ends of the 1st and 2nd sheets, and the 3rd and 4th sheets, and form the outer end by connecting these 4 sheets all at once. It is something.

The commutator element 21 has a large number of commutator elements 21a electrically connected to the 210th body 20c of the amateur coil 20 by fusing, and the commutator elements 21a are mutually connected to the insulator 24.
electrically insulated by

The inner circumferential edge of this commutator part 21 is the insulator 2.
The armature coil 20 is fitted into the outer cylinder of the sleeve portion 22a of the armature coil 20 through the inner circumference
The bearing is held under pressure by the flange portion 22b of the rotor hub 22 and the commutator 21. Note that 25 in the figure is an oil drain groove.

In particular, this fun mutator 21 is
If the 0 and 0 parts are constructed separately, the commutator 21 can be made of a 4fitl with a thick wall different from the thin plate of the armature coil 20.
Since the commutator 21 can be molded using a material 1, the brush can be constructed using a hard material that causes some wear on the commutator 21. In other words, a metallic brush with a small brush drop can be used instead of the conventional graphite-based or graphite-based brush. If such a metallic brush is used, heat loss in this brush portion will be reduced, and a decrease in motor output can be prevented.

It can also be machined to improve the surface accuracy of the 21 mm Jtater. , it is also possible to shorten the lifespan.

Moreover, if such a commutator 21 is used, since it covers the upper part of the armature coil 20, the straight part 20a of the armature coil 20 can be made as long as possible, and the outer diameter % Even if J th is regulated, a large rotational force of 1q can be generated. Furthermore, since the sliding radius B of the brush of the numeral data 21 can be made as small as possible, the relative circumferential speed between the brush 4 and the numeral data 21 can also be made small, thereby reducing noise.

Roughly speaking, if the funmudata 21 can be constructed using a relatively thick material, the electrical resistance of this portion can be reduced, and heat generation due to the current passing through C1 can also be suppressed.

In particular, this commutator 21 generates not only electrical heat but also mechanical frictional heat as the brushes slide.
If the generation of such heat is suppressed, the performance such as the output of the motor can be increased accordingly. On the other hand, when assembling this print motor, see Figure 6 (1).
The same members as those shown in the figure are given the same reference numerals.) As shown in the figure, attach the A bracket 5A to the left end bearing 7, and then insert the shaft 6 into the U-Y1<. By inserting the B bracket 5B with the magnet 1-1 into the A bracket 5△, it is possible to assemble in one direction, so to speak, in a stacked manner. In this case, in the case of a conventional motor as shown in FIG. 1, the mounting of the brush portion is not compatible with the front and rear stacking type.

C1 In this example, this brush part is made into a unit.
, this brush unit 26 is inserted into the through hole 2 of the B bracket 5B.
I am trying to insert it into 1.

This brush unit 26 connects the brush 4 to the brush holder 1.
0, and attach this brush holder 10 to the board 28 (
In addition, one end of a spring shaft 29 and a coil spring 30 provided on the base plate 28 are wound around each other, and the open end of the coil spring 30 pressurizes the rear end of the brush 34.

If you use this brush unit 26, pudding 1 to 1:-
9 can be assembled in a stacked manner, making it possible to assemble the puddings 1-1--9 as shown in FIG. 7 very quickly.

[Effects of the Invention] As is clear from the above description, according to the present invention, an amadeur and a commutator made of strip-shaped coils are formed on the side surface of a disc-shaped rotor, and this disc-shaped rotor is In the print motor that is attached to the rotating shaft via the U-ta hub and the =1 mm data, the inner peripheral edge of the Amadeur is held under pressure, suppressing heat generation at the 21 mm and 1 mm and reducing brush drop. This makes it possible to lengthen the straight part of the amateur coil, reduce the circumferential speed of the relationship between the brush and the motor, and improve the overall (motor output) j, as well as the brush holder. This means that it can be reduced.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a conventional motor, Fig. 2 is a plan view of the disc rotor of the same motor, Fig. 3 is a cross-sectional view taken along the ■-In line in Fig. 2, and Fig. 4 is a cross-sectional view of the motor according to the present invention. One embodiment is shown, in which Fig. 5 is a plan view of the disk rotor, Fig. 5 is a cross-sectional view taken along the line ■-v in Fig. 4, and Fig. 6 is an assembly of the printer 1 to the motor by moving the factor rotor to the right. 1 is an exploded sectional view showing the state, and FIG. 7 is a sectional view 'C' showing the assembled state of the print motor. 20...Amateur'il 21...=Convoluted Mutator, 22...Rotaha J Patent Applicant: Kuchimoto Radiator Co., Ltd. Figure 2, Figure 3

Claims (1)

[Claims] A pudding small motor has an amadeur made of a band-shaped coil and a commutator formed on the side surface of a disc-shaped rotor, and this disc-shaped rotor is attached to a rotating shaft via a rotor hub.
21) A print motor in which the inner peripheral edge of the armature (20) is held under pressure.