JP2002010580A - Motor armature - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable reuse of a used motor armature provided with a commutator to form a new motor. SOLUTION: This motor armature 10 is provided with a core 30 winding a coil and the commutator 50 connected to the coil 40 to distribute the power received from a brush provided in contact to the coil 40. The commutator 50 is formed of a connecting portion 52 for connecting the coil 40 and a contact portion 54 which is provided in contact with the brush which can be separated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor armature provided with a commutator.

[0002]

2. Description of the Related Art A motor armature provided with a commutator is discarded after its use. This is because the function of the motor has deteriorated due to the use of the motor.In particular, the motor armature is not suitable for a new motor because the commutator that is provided generates abrasion and roughness based on electric sparks and heat at the contact point with the brush. This is because it becomes difficult to re-use. However, many of the motor armatures are less damaged and can be reused, except for the abutment of the commutator with the brush, which causes wear and roughness. Further, the motor armature is not easy to disassemble and dispose, because foreign objects such as iron, copper, and resin are complicatedly combined.

[0003]

Accordingly, an object of the present invention is to make it possible to reuse a used motor armature having a commutator for a new motor.

[0004]

According to a first aspect of the present invention, there is provided a core having a winding wound thereon and a commutator for distributing electric power received from a brush connected to and abutting on the winding to the winding. In a motor armature, the gist of the present invention is that the commutator is formed so as to be separable into a connection part connecting the winding and a contact part contacted by the brush.

According to a second aspect of the present invention, in the motor armature according to the first aspect, the connecting portion and the contact portion each have the same number of segments divided by a constant width in a circumferential direction, and The gist is that the segments of the connecting portion and the segments of the contact portion are elastically joined in the radial direction.

According to a third aspect of the present invention, in the motor armature according to the second aspect, a joining piece is formed on each segment of the contact portion so as to extend to an inside of the connection portion in an axial direction, and the connection portion is formed. The gist of the present invention is that a concave portion is formed on the inner diameter side of the joint surface of the portion with the joint piece so that the joint piece or the segment of the connecting portion can be bent to the inner diameter side.

[0007]

According to the first aspect of the present invention, the commutator is formed so as to be separable into a connection portion for connecting the winding and a contact portion with which the brush contacts. Therefore, after use of the motor, only the contact portion between the worn and rough commutator brush and the new contact portion can be replaced, so that the noise between the brush and the contact portion of the commutator is equivalent to that of the new one. As a result, most of the motor armature is reused for a new motor. This solves the problem of disassembling and disposing of the motor armature.

According to the second aspect of the present invention, the connecting portion and the contact portion each include the same number of segments divided by a constant width in the circumferential direction, and the segment of the connecting portion and the contact portion are provided. Each of the segments of the section is radially resiliently joined. Therefore, by pulling the contact portion in the axial direction toward the side opposite to the core, the contact portion can be easily separated from the connection portion.

According to the third aspect of the present invention, each segment of the contact portion is formed with a joint piece extending to the inside of the connection portion in the axial direction, and the connection portion is joined to the joint piece. A concave portion is formed on the inner diameter side of the surface so that the joining piece or the segment of the connection portion can be bent toward the inner diameter side. Therefore, since the joining piece or the segment of the connecting portion is easily bent to the inner diameter side, the resilient joining between the segment of the connecting portion and the segment of the contact portion becomes more reliable, and The dimensions of such parts do not require high precision.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, a motor armature 10 according to the present invention includes a steel rotating shaft 20, a slotted core 30 fixed to the rotating shaft 20, and a winding 4 wound around a slot of the core 30.
0, a substantially cylindrical commutator 5 fixed to the rotating shaft 20 and connected to the winding 40 to abut against a brush (not shown) and distribute electric power received from the brush to the winding 40
0 or the like.

Here, the commutator 50 is shown in FIG. 2 which is an axial sectional view of the commutator 50, and a segment 52a, which will be described later, constituting the commutator 50,
As shown in FIG. 3, which is a perspective view of
Contact portion 5 where the brush contacts with a connecting portion 52 for connecting the brush
4 are formed so as to be separable.

More specifically, the connecting portion 52 has an outer shell composed of ten copper segments 52a divided at a constant width in the circumferential direction, and the inside thereof has these segments 52a.
a is integrally formed of an insulating resin 52b. A fixing hole 52c is formed at the center of the resin 52b, and the hole 52c and the rotating shaft 20 are press-fitted and the connecting portion 52 is fixed to the rotating shaft 20. In addition, the segment 52a
Are respectively one riser 52d extending in the outer diameter direction for connection with the winding 40, and two upper and lower engagement pieces 52 extending inwardly for engaging and fixing to the resin 52b.
e is formed. Further, a concave portion 52g that allows a joining piece 54d of a contact portion 54 to be described later to be joined to the inner diameter surface 52f of the segment 52a and bend to the inner diameter side.
Are formed on the outer diameter side of the resin 52b and on the contact portion 54 side.

Further, a contact portion 54 with which the brush contacts.
Similarly, the outer shell is composed of ten copper segments 54a having the same number as the segments 52a of the connection portion 52 divided at a constant width in the circumferential direction, and the inside thereof integrally holds these segments 54a. Insulating resin 54b
It is composed of A fixing hole 5 is provided at the center of the resin 54b.
4c is formed, and the hole 54c and the rotary shaft 20 are press-fitted and the connection portion 54 is fixed to the rotary shaft 20. The segment 54a is formed with two upper and lower engagement pieces 54e extending to the inner diameter side for engaging and fixing to the resin 54b, and reaches the inner diameter side of the connection portion 52. 1 that resiliently abuts the inner diameter surface 52f of the
Two joining pieces 54d are formed. The outer diameter of the outer peripheral surface 54i of the joining piece 54d is formed slightly larger than the inner diameter of the inner peripheral surface 52f of the segment 52a,
Thereby, the joining piece 54d and the segment 52a of the connecting portion 52 are elastically joined in the radial direction. In addition, the joining piece 54d and the segment 52a are bent and joined to the inner diameter side by the concave portion 52g.

As shown in FIG. 3, the connection between the connecting portion 52 and the contact portion 54 is such that each of the segments 52a of the connecting portion 52 is paired with only one of the segments 54a of the contact portion 54. The joining piece 54d is pressed into the inner peripheral surface of the segment 52a through the space 52h between the two engaging pieces 52e so as to be electrically connected to each other.

Conversely, the commutator 50 is connected to the rotating shaft 2.
The separation of the contact portion 54 from the connection portion 52 after being fixed to 0 and the winding 40 is connected is performed by gripping the outer peripheral surface 54i of the contact portion 54 with a tool (not shown) and facing the opposite core 30 side. This is done by pulling in the axial direction. Joining piece 54
Since d and the segment 52a of the connecting portion 52 are resiliently joined in the radial direction, they do not become resistant to the tensile force in the axial direction, and affect the fixing of the connecting portion 54 to the rotating shaft 20. It is possible to separate without using. That is, the contact portion 54
It is only necessary to consider pulling out the contact portion 54 from the press-fitted rotary shaft 20, and it is sufficient to simply grip the contact portion 54 with a tool and pull in the axial direction toward the non-core 30.

Next, a second embodiment of the present invention will be described with reference to FIG. This embodiment is different from the first embodiment mainly in the joining piece 1 in the commutator 150.
54d is different from that of FIG. Therefore, the description of the parts that are functionally common to the first embodiment will be omitted, and the parts related to the differences will be described below.

The joining piece 154d of the present embodiment is formed by connecting the outer peripheral surface 1 on the connection portion 152 side from the end of the segment 154a on the connection portion 152 side.
It is formed to extend to 52i. The inner diameter of the inner peripheral surface 154f of the joining piece 154d is
Are slightly smaller than the outer diameter of the outer peripheral surface 152i of the segment 152a. As a result, the joining piece 154d and the segment 152a of the connecting portion 152 are elastically joined in the radial direction. Also, the joining piece 1
54d and the segment 152a are bent and joined to the inner diameter side by the concave portion 152g.

A cylindrical projection 152j is formed on the end surface of the resin 152b of the connection section 152 on the contact section 154 side, and a round groove 154j that fits into the projection 152j is formed in the contact section 154. I have. The projections 152j and the round grooves 154j are formed such that each of the segments 152a of the connecting portion 152 is combined with only one of the segments 154a of the abutting portion 154 when the abutting portion 154 is connected to the connecting portion 152. It is provided for positioning so as to be electrically connected to each other.

Under the above-described configuration, the connection between the contact portion 154 and the connection portion 152 in the present embodiment is performed by connecting the protrusion 152j to the round groove 1.
54j, and the joining piece 154d is pressed into the outer peripheral surface 152i of the segment 152a.
Thus, as described above, the segment 15 of the connection portion 152
Each of the segments 2a is electrically connected to each of the segments 154a of the contact portion 154 as a set.

Conversely, after the commutator 150 is fixed to the rotating shaft 20 and the winding 40 is connected, the separation of the contact portion 154 from the connection portion 152 in this embodiment is performed in the same manner as in the first embodiment. This is performed by gripping the outer peripheral surface 154i of the contact portion 154 with a tool and pulling the outer peripheral surface 154i in the axial direction toward the side opposite to the core 30.

[0021]

As described in detail above, according to the present invention,
The commutators 50 and 150 are connected to the connecting portions 52 and 152 for connecting the windings 40 and the contact portions 54 and 15 for the brush to contact.
4 so that after the motor is used, only the abutted portions 54 and 154 of the brushes of the commutators 50 and 150 that are worn and rough can be replaced with new abutted portions. The noise between the contact portions 54 and 154 of the motors 50 and 150 is suppressed to the same level as that of a new motor, and most of the motor armature 10 is reused for a new motor. Thus, the problem of disassembling and disposing of the motor armature 10 is solved.

The contact portions 54 and 154 are formed so that the segments 52a and 152a of the connection portions 52 and 152 and the segments 54a and 154a of the contact portions 54 and 154 are resiliently pressed in the radial direction. Since they are joined, the contact portions can be easily separated from the connection portions 52 and 152 by being pulled in the axial direction toward the non-core side.

Further, on the inner diameter side of the joint surfaces 52f, 152i of the connecting portions 52, 152 with the joining pieces 54d, 154d, the segments 52a, 152a of the joining pieces 54d, 154d or the connecting portions 52, 152 are provided. Since the concave portions 52g and 152g that can bend to the inner diameter side are formed, the joining pieces 54d and 154d or the segments 52a and 152a of the connecting portions 52 and 152 are easily bent to the inner diameter side, so that the connection is performed. Segments 52a, 152a of the portions 52, 152 and the contact portions 54, 154
The resilient joining of the segments 54a and 154a with each other is more reliable, and the size of the portion related to joining does not require high precision.

[Brief description of the drawings]

FIG. 1 shows a motor armature 1 according to a first embodiment of the present invention.
FIG.

FIG. 2 shows a commutator 50 according to the first embodiment of the present invention.
FIG.

FIG. 3 shows a commutator 50 according to the first embodiment of the present invention.
FIG. 5 is a perspective view of segments 52a and 54b.

FIG. 4 shows a commutator 15 according to a second embodiment of the present invention.
0 is an axial sectional view.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Motor armature, 20 ... Rotation axis, 30 ... Core, 40 ... Winding, 44 ..., 50, 150 ... Commutator, 52, 152 ... Connection part, 52a, 54a, 1
52a, 154a ... segment, 52b, 54b, 1
52b ... resin, 52c, 54c ... hole, 52d ... riser, 52e, 54e ... engaging piece, 52f, 154f ... inner diameter surface, 52h ... between engaging pieces 52e, 52g, 152g ...
Recess, 54, 154 ... abutment, 54d, 154d ... joining piece, 54i, 152i ... outer peripheral surface, 152j ... projection
154j ... Round groove

Claims (3)

[Claims] 1. A motor armature having a core on which a winding is wound and a commutator for distributing electric power received from a brush connected to and contacting the winding to the winding, wherein the commutator connects the winding. A motor armature, which is formed so as to be separable into a connecting portion that makes contact and a contact portion that makes contact with the brush. 2. The connecting portion and the contact portion each include an equal number of segments divided by a constant width in a circumferential direction, and the connection portion segment and the contact portion segment each include: The motor armature according to claim 1, wherein the motor armature is elastically joined in a radial direction. 3. A joining piece extending to the inside of the connecting portion in the axial direction is formed in each segment of the contact portion, and the joining portion is provided on an inner diameter side of a joining surface of the connecting portion with the joining piece. The motor armature according to claim 2, wherein a concave portion is formed to allow the piece or the segment of the connection portion to bend toward the inner diameter side.