JPH04114769U - Flat DC motor - Google Patents

Abstract

(57) [Summary] [Structure] A disc-shaped armature 3, a load-side bracket and an anti-load-side bracket each provided with yoke parts 11 and 61 parallel to the surface of the armature 3, and yoke parts 11 and 6.
1, and includes a plurality of permanent magnets 5A, 5B facing the armature 3 with a gap therebetween, and a brush 8 provided at right angles to a commutator surface formed on the surface of the armature 3. In a DC motor, the yoke portion 61 of the anti-load side bracket 6
A through hole 64 is provided in a side surface 62 provided on the outer periphery of the armature 3 and is substantially parallel to the surfaces of the two armatures 3. [Effect] Compressed air sent through one through hole flows along the flat surface of the armature and bracket, and brush powder adhering to the inside of the motor is discharged from the other through hole, so there is almost no brush powder inside the motor. No powder remains, insulation resistance can be reduced to a low value after cleaning the inside, and a flat DC motor with stable quality can be provided.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a flat DC motor having a flat armature with a commutator surface.

0002

[Conventional technology]

Conventionally, flat DC motors that supply power by sliding brushes on the commutator surface cannot be used for long periods of time. If the brush is used, the brush will wear out and brush powder will scatter around the armature, but this will cause a short circuit phenomenon. Brush powder may be deposited on a part of the casing, as this may increase the frictional resistance. When the brush wears out and needs to be replaced, compressed air can be released from one brush holder hole. Clean the inside by blowing air into the brush holder, and expel the brush powder along with the air from the other brush holder hole. For example, Japanese Utility Model Publication No. 14694/1983 discloses a method for releasing the same.

0003

[Problem that the idea aims to solve]

However, in the above configuration, the brush holder hole is oriented at right angles to the flat armature. Therefore, even if you try to discharge the brush powder with compressed air, some of it will still flow toward the outer circumference of the armature. remains and is not completely discharged, and the insulation resistance value of the motor is lower than when it was new when the brushes were replaced. The disadvantage was that the latter value was quite low. The present invention is designed to completely discharge brush dust and maintain the quality of the motor. The purpose is to

0004

[Means to solve the problem]

The present invention is a load having a disk-shaped armature and a yoke section parallel to the armature surface. The side and anti-load side brackets are fixed to the yoke part and have a gap in the armature. a plurality of permanent magnets facing each other via a commutator surface formed on the surface of the armature; In a flat DC motor equipped with brushes provided at right angles to the or on the side surface provided on the outer periphery of the yoke part of either the bracket on the anti-load side. In both cases, substantially parallel through holes are provided on the surfaces of the two armatures.

[0005]

[Effect]

Multiple through-holes on the side of the bracket are provided on the armature surface, load side, and It is almost parallel to the surface of the yoke part of the load side bracket, so it cannot be attached inside the motor. When discharging accumulated brush powder, blow compressed air through one of the through-holes to reduce the pressure. The compressed air flows along the surfaces of the load side bracket, anti-load side bracket, armature, etc. air that is attached or deposited inside the motor along with compressed air from other through holes. Drain the brush powder.

[0006]

【Example】

An embodiment of the present invention shown in the drawings will be described. Figure 1 is a side sectional view showing an embodiment of the present invention, and Figure 2 is a front sectional view of the load side bracket. A rotary shaft 4 to which a disk-shaped armature 3 is fixed is supported at the center of the kit 1 via a bearing 2. It is. A yoke portion 1 parallel to the armature 3 is provided on the outer periphery of the bearing 2 of the load side bracket 1. 1 is provided, and a plurality of permanent magnets 5A are provided concentrically facing the armature through an air gap. It is fixed to form a field, and a flange portion 12 is formed on the outer periphery. anti load The side bracket 6 includes a disk-shaped yoke portion 61 parallel to the armature 3 and an outer portion of the yoke portion 61. A cylindrical side surface portion 62 provided on the periphery and a ring-shaped side surface portion 62 provided on the outer periphery of the side surface portion 62. The flange part 63 is composed of the load side bracket 1 and the flange part 63. It is in surface contact with the flange portion 12 of. The yoke part 61 has a A plurality of permanent magnets 5B are fixed so as to correspond to the eclipsed permanent magnet 5A. . A plurality of brush holders 7 are fixed at predetermined positions between the permanent magnets 5B. The brush 8 inserted into the rasp hole 71 slides on the commutator surface formed on the surface of the armature 3. It is pressed by a spring 72 so as to do so. In the side part 62 Two through holes 64 are provided in the yoke portion 61 at symmetrical positions and approximately parallel to each other. sealed by a shing. In this way, the through hole 64 is formed on the surface of the armature 3 and on the load side and anti-load side brackets. Since it is provided almost parallel to the surface of the yoke part 1, it prevents the brush from sticking inside the motor. When discharging the mustard powder, remove the bushing of the through hole 64 provided in the side part 62. , when compressed air is blown into one through hole 64, the compressed air flows as shown by the arrow. , wash the surfaces of the load side bracket 1, anti-load side bracket 6, armature 3, etc. had adhered or accumulated inside the motor along with the compressed air from other through holes 63. Discharge brush powder P. Note that the number of through holes is not limited to two, but may be multiple. It is not limited to being installed on the outer part of the load side bracket, but it may be installed on the outer periphery of the load side bracket .

[0007]

[Effect of the idea]

As described above, according to the present invention, the compressed air sent through one through hole is Flows along the flat armature and bracket surfaces to remove brush powder from other through-holes. Since the brush powder is discharged, there is almost no brush powder left inside the motor, making it easy to clean the inside. When this happens, the insulation resistance of the motor can be reduced to a low value, and DC current with stable quality can be obtained. This has the effect of providing an electric motor.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

FIG. 2 is a front sectional view taken along the - section of FIG. 1 of the present invention.

[Explanation of symbols] 1 Load side bracket 11 Yoke part 12 Flange part 2 Bearing 3 Armature 4 Rotation axis 5A, 5B Permanent magnet 6 Anti-load side bracket 61 Yoke part 62 Side part 63 Flange part 64 Through hole 7 Brush holder 8 Brush

Claims (1)

[Scope of utility model registration request] 1. A disc-shaped armature, load-side and anti-load-side brackets each having a yoke section parallel to the armature surface, and a bracket fixed to the yoke section and connected to the armature through a gap. In a flat DC motor comprising a plurality of opposing permanent magnets and a brush provided perpendicularly to a commutator surface formed on the surface of the armature, the bracket on either the load side or the anti-load side. A flat direct current motor, characterized in that at least two through holes substantially parallel to the armature surface are provided in a side surface provided on the outer periphery of the yoke part.