JP2002136064A - Motor armature - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to make a part of a used motor armature provided with a commutator reusable for a new motor. A motor armature includes a rotating shaft,
A commutator 50 configured such that the core 30 on which the windings 40 are wound, and a connecting portion 52 for connecting the windings 40 and a contact portion 54 with which a brush for supplying electric power abuts are separable;
A cylinder 60 for fixing the core 30 and the commutator 50 integrally and fixing the rotary shaft 20 on the inner peripheral surface 62 and capable of being separated from the rotary shaft 20 in the axial direction; .

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art A rotating motor armature provided with a commutator is discarded after use of the motor. this is,
This is because the function is deteriorated by the use of the motor.However, especially in the motor armature, the output part of the rotating shaft is worn out with the mating coupling part or the sliding contact part supported by the bearing is slidably worn. This is because it is difficult to reuse the new motor. At the same time, the commutator connected to the winding generates abrasion and roughness based on electric spark and heat in the contact portion with the brush, so that it is difficult to reuse the commutator for a new motor. Therefore,
Other components can often be used after the motor has been used.

On the other hand, in a motor armature, a rotating shaft and a core are covered with an insulating resin and a winding is entangled with the core. Therefore, when the motor armature is disposed, the rotating shaft, the insulating resin, the core and the winding are separated. Was difficult. For this reason,
Except for the output portion and the sliding contact portion of the rotating shaft, which causes abrasion and roughness, and the contact portion of the commutator with the brush, the damage can be reduced and reuse is possible, and it is necessary to promote the reuse of the motor armature.

[0004]

Accordingly, an object of the present invention is to make a part of a used motor armature provided with a commutator reusable for a new motor.

[0005]

According to a first aspect of the present invention, a motor armature is configured to receive electric power received from a rotating shaft, a core on which a winding is wound, and a brush connected to and in contact with the winding. A commutator that distributes power to the windings, and a cylinder that fixes the core and the commutator integrally and fixes the rotating shaft on the inner peripheral surface and is separable in the axial direction from the rotating shaft. The gist is that

According to a second aspect of the present invention, in the motor armature according to the first aspect, the rotating shaft is formed such that a fixed portion with the cylinder has a large diameter with a sliding contact portion supported by a bearing. The gist is that the cylinder is fixed by press fitting.

According to a third aspect of the present invention, in the motor armature according to the first aspect, a male screw is formed on a fixed portion of the rotating shaft with the cylinder, and the cylinder is a female screw provided on the cylinder. And that they are screwed together.

According to a fourth aspect of the present invention, in the motor armature according to any one of the first to third aspects, the commutator has a connecting portion connected to the winding and a contact portion with which the brush contacts. The gist of the present invention is that it is formed so as to be separable.

According to a fifth aspect of the present invention, in the motor armature according to the fourth 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.

[0010]

According to the first aspect of the present invention, the motor armature is configured such that a cylinder in which the core, the winding, and the commutator are integrally fixed is separable from the rotating shaft in the axial direction.
Therefore, after the motor is used, only the rotating shaft that has the abraded and roughened output part and the sliding part can be replaced with a new rotating shaft, so that all parts of the motor armature except the rotating shaft can be reused. Becomes The present invention is particularly effective when the rotating shaft is more damaged than the commutator. Further, since the cylinder and the rotating shaft are fixed at the inner and outer circumferences, the two are easily separated in the axial direction. This solves the problem of disassembling and disposing of the motor armature.

According to the second aspect of the present invention, the rotary shaft is formed such that a fixed portion with the cylinder has a large diameter with respect to a sliding contact portion supported by a bearing, and is fixed to the cylinder by press-fitting. ing. Thus, by axially pushing the axial end of the cylinder, the cylinder and the axis of rotation are easily separated.

According to the third aspect of the present invention, the rotary shaft has a male screw formed at a fixing portion with the cylinder, and the rotary shaft is screwed and fixed with a female screw provided on the cylinder. . Therefore, the cylinder can be easily detached from the rotation shaft, and the inner peripheral surface of the cylinder, which is the screwing surface with the rotation shaft, that is, the female screw is hardly damaged, and the cylinder can be reliably reused many times. .

According to the fourth aspect of the present invention, the commutator is formed so as to be separable from a connecting portion connected to the winding and a contact portion with which the brush contacts. Therefore, after use of the motor, in addition to the rotating shaft, only the contact portion of the commutator worn and rough between the brush and the brush can be replaced with a new contact portion, so that the contact between the brush and the contact portion of the commutator can be replaced. As a result of the noise being suppressed to the same level as that of a new product, the connection of the core, the winding, and the commutator, which is the main part of the motor armature and is difficult to disassemble and dispose, is reused. This solves the problem of disassembling and disposing of the motor armature.

According to the fifth aspect of the present invention, the connecting portion and the contact portion each have 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. The gist is that each of the segments of the part is elastically joined in the radial direction. 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.

[0015]

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, the motor armature 10 according to the present invention includes a steel rotary shaft 20 having an output portion 22 at a distal end and a sliding contact portion 24 that is supported in sliding contact with a bearing indicated by a dashed line. Axis 20
A steel cylinder 60 in which an inner peripheral surface 62 is press-fitted and fixed to a central fixing portion of an outer peripheral surface 26, ten slotted cores 30 that are press-fitted and fixed to an outer peripheral surface 64 of the cylinder 60, The winding 40 is fixed to the outer peripheral surface 64 of the cylinder 60 and connected to the winding 40 so as to abut on a brush (not shown) and receive power received from the brush.
And a substantially columnar commutator 50 for distributing power to the power supply.

Here, the rotation shaft 20 is connected to the cylinder 60.
The outer diameter of the fixing portion for fixing the outer peripheral portion is formed larger than the outer diameter of the sliding contact portion 24. Thus, the cylinder 60 is press-fitted and fixed by being pushed in from the axial direction of the rotating shaft 20, and is separated by pushing the axial end of the cylinder 60 in the anti-axial direction. In this example, as shown in FIG.
After the core 30 and the commutator 50 are press-fitted and the winding 40 is wound thereon, the cylinder 60 is press-fitted into the rotating shaft 20.
Of course, after press-fitting the cylinder 60, press-fitting of the core 30 and the commutator 50 and winding of the winding wire 40 may be performed.
Although the cylinder 60 is made of steel, it may be made of resin. In the case of resin, the electric insulation treatment of the rotating shaft 20 is not required.

As shown in FIG. 3 which is an axial sectional view of the commutator 50 and FIG. 4 which is a perspective view of segments 52a and 54a which will be described later, the commutator 50 has a connecting portion for connecting the windings 40. 52 and a contact portion 54 with which the brush abuts are formed so as to be separable.

More specifically, the connecting portion 52 has an outer shell formed of ten copper segments 52a divided at a constant width in the circumferential direction, and an inner portion thereof is an insulating member for integrally holding the segments 52a. It is made of a conductive resin 52b. A fixing hole 52c is formed at the center of the resin 52b, and the hole 52c and the outer peripheral surface 64 of the cylinder 60 are press-fitted and the connection portion 52 is fixed to the cylinder 60. Each of the segments 52a has one riser 52d extending in the outer diameter direction for connection with the winding 40 and two upper and lower portions extending in the inner diameter side for engaging and fixing to the resin 52b.
Two engagement pieces 52e are formed. Further, a concave portion 52g that allows a joining piece 54d of the abutting portion 54 to be described later to be joined to the inner diameter surface 52f of the segment 52a and to bend to the inner diameter side is provided on the outer diameter side of the resin 52b. It is formed on the 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, the hole 54c and the outer peripheral surface 6 of the cylinder 60 are formed.
4 is press-fitted, and the connection portion 54 is fixed to the cylinder 60.
The segment 54a has two upper and lower engaging pieces 54e extending to the inner diameter side for engaging and fixing to the resin 54b.
Are formed, and one joining piece 54d is formed to reach the inner diameter side of the connection portion 52 and resiliently abut against the inner diameter surface 52f of the segment 52a. The outer diameter of the outer peripheral surface 54i of the joining piece 54d is formed to be slightly larger than the inner diameter of the inner peripheral surface 52f of the segment 52a, whereby the joining piece 54d and the segment 52a of the connecting portion 52 are in the radial direction. To resiliently. 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. 4, 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 connection piece 54d is press-fitted into the inner peripheral surface of the segment 52a through the space 52h between the two engagement pieces 52e so as to be electrically connected to each other.

Conversely, the commutator 50 is a cylinder 60
Contact portion 5 after being fixed to the
4 is separated from the connecting portion 52 by gripping the outer peripheral surface 54i of the contact portion 54 with a tool (not shown) and pulling the outer peripheral surface 54i in the axial direction toward the non-core 30 side. Joint piece 54d
And the segment 52a of the connecting portion 52 is resiliently joined in the radial direction, so that it does not become resistant to the tensile force in the axial direction and does not affect the fixing of the connecting portion 54 to the cylinder 60. It is possible to separate. That is, the contact portion 54
It is only necessary to consider pulling out the contact portion 54 from the press-fitted cylinder 60, 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 side.

Next, a second embodiment of the present invention will be described with reference to FIGS. This embodiment is different from the first embodiment in that the rotation shaft 120 and the cylinder 160 are integrally fixed not by press-fitting but by screwing. Therefore, only the differences from the first embodiment will be described.

In the motor armature 110 of this embodiment, FIG.
A male screw 128 is provided at the center fixing portion of the outer peripheral surface 126 of the rotating shaft 120, and a female screw 168 (not shown) screwed to the male screw 128 is provided on the inner peripheral surface 162 of the cylinder 160. The two screws are screwed together to be integrated or separated. Further, in this example, as shown in FIG. 5, the stopper 70 abutting on the end of the cylinder 160 is press-fitted into the rotating shaft 120 so that the cylinder 160 does not move in the axial direction due to loosening of the screws.

Next, a third 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 in that it is joined to the outer peripheral surface 152i of the segment 152a of the connecting portion 152. Therefore, the description of the portions that are functionally common to the first embodiment will be omitted, and the portions relating to the differences will be described below.

The joining piece 154d of this embodiment is formed by connecting the outer peripheral surface 1 of the connecting portion 152 to the end of the segment 154a of the connecting portion 152.
It is formed to extend to 52i. The inner diameter of the inner peripheral surface 154f of the joining piece 154d is
Is 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 related to 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 connecting portion 152 and the connecting portion 152 are connected. 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 this 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.

On the contrary, the commutator 150 is a cylinder 6
The contact portion 154 of this example is separated from the connection portion 152 after being fixed to 0 and the winding 40 is connected, and the outer peripheral surface 154i of the contact portion 154 is tooled similarly to the first embodiment. It is performed by grasping and pulling in the axial direction toward the non-core 30 side.

[0029]

As described above in detail, according to the first aspect of the present invention, the motor armature 10 comprises the cylinder 6 in which the core 30, the winding 40 and the commutator 50 are integrally fixed.
0 is configured to be separable in the axial direction from the rotating shaft 20, so that the output unit 2 that has been worn and rough after use of the motor.
2 and a new rotary shaft 2 having a sliding contact portion 24 only.
Motor armature 10 excluding the rotating shaft 20
Can be reused. Further, since the cylinder 60 and the rotary shaft 20 are fixed at the inner and outer circumferences, the two can be easily separated in the axial direction. Thus, the problem of disassembling and disposing of the motor armature 10 is solved.

According to the second aspect of the present invention, the rotating shaft 20 is formed such that a portion fixed to the cylinder 60 has a large diameter with respect to the sliding contact portion 24 of the bearing. Since it is fixed, the cylinder 60 and the rotating shaft 20 are easily separated by pushing the axial end of the cylinder 60 in the axial direction.

According to the third aspect of the present invention, the rotary shaft 120 has a male screw 126 formed in a fixing portion with the cylinder 160, and the cylinder 160 is provided on the inner peripheral surface of the cylinder 160. Since the cylinder 160 is screwed and fixed to the rotating shaft 120, the cylinder 160 can be easily detached from the rotating shaft 120, and the cylinder 16 which is a screwing surface with the rotating shaft 120.
The inner peripheral surface 0, that is, the female screw 66 is hardly damaged, and reuse is reliably performed many times.

According to the fourth aspect of the present invention, the commutators 50 and 150 are connected to the connecting portions 52 and 152 connected to the winding 40 and the contact portions 54 and 154 to which the brush contacts. After use of the motor, only the contact portions 54 and 154 of the commutators 50 and 150 worn and rough between the brushes and the rotating shaft 20 after use of the motor are replaced with new contact portions. The core 30, the windings 40, and the commutator 5, which are interchangeable with the main armature 10, and are difficult to disassemble and dispose.
The connection parts 52 and 152 of 0 and 150 will be reused. Thus, the problem of disassembling and disposing of the motor armature 10 is solved.

According to the fifth aspect of the present invention, the connecting portions 52 and 152 and the contact portions 54 and 154 are
The same number of segments divided by a constant width in the circumferential direction are provided, respectively, and the segments of the connecting portions 52, 152 and the segments of the contact portions 54, 154 are elastically joined in the radial direction. Therefore, by pulling the contact portions 54, 154 in the axial direction toward the opposite side of the core, the contact portions 54, 154 are pulled.
54 can be easily separated from the connection portions 52 and 152.

[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 cylinder 60 and a core 3 according to the first embodiment of the present invention.
0, the winding 40 and the commutator 50 are integrally fixed.

FIG. 3 shows a commutator 50 according to the first embodiment of the present invention.
FIG.

FIG. 4 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. 5 is a motor armature 1 according to a second embodiment of the present invention.
FIG.

FIG. 6 is a schematic diagram of a rotating shaft 120 according to a second embodiment of the present invention.

FIG. 7 shows a commutator 15 according to a second embodiment of the present invention.
0 is an axial sectional view.

[Explanation of symbols]

10, 110 ... motor armature, 20, 120 ... rotating shaft, 22 ... output part, 24 ... sliding contact part, 26, 126 ...
Outer peripheral surface, 30 core, 40 winding, 50, 150 ...
Commutator, 52, 152 ... connection part, 52a, 5
4a, 152a, 154a ... segment, 52b, 5
4b, 152b ... resin, 52c, 54c ... hole, 52d
... Riser, 52e, 54e ... Engagement piece, 52f, 154
f: inner diameter surface, 52h: between engaging pieces 52e, 52g, 15
2g: concave portion, 54, 154: contact portion, 54d, 154
d: joining piece, 54i, 152i ... outer peripheral surface, 60, 16
0: cylindrical, 62, 162: inner peripheral surface, 64: outer peripheral surface,
70 Stopper, 152j Projection, 154j Round groove, 128 Male screw, 168 Female screw

Claims (5)

[Claims] 1. A rotating shaft, a core on which a winding is wound, a commutator for distributing power received from a brush connected to and abutting on the winding to the winding, and the core and the commutator integrally fixed. And a cylinder fixed to the inner periphery of the rotating shaft and separable in the axial direction from the rotating shaft. 2. The rotating shaft is formed such that a fixed portion with the cylinder has a large diameter with respect to a sliding contact portion supported by a bearing,
The motor armature according to claim 1, wherein the cylinder is fixed by press-fitting. 3. The rotary shaft according to claim 1, wherein a male screw is formed in a fixing portion with the cylinder, and the cylinder is screwed and fixed with a female screw provided in the cylinder. Motor armature as described. 4. The commutator is formed so as to be separable from a connecting part connected to the winding and a contact part with which the brush contacts.
4. The motor armature according to any one of claims 1 to 3. 5. The connection 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 4, wherein the motor armature is elastically joined in a radial direction.