JP2000139061A - Electric rotating machine and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric rotating machine which is capable of facilitating and automatizing fitting work of a surge absorbing element to a commutator and has excellent workability and reliability in connecting work. SOLUTION: This electric rotating machine is provided with a commutator 14 involving a plurality of commutator pieces 14a and an annular surge absorbing element 16 which is positioned so as to surround the outer circumference of the commutator 14 and has an electrode 40 on the outer-periphery surface. Each of the commutator pieces 14a involves a commutator body 15, a riser part 20 extending from the commutator body 15 so that the surge absorbing element 16 may be placed thereon, and a connection part 23 formed so as to extend from the riser part 20. The connection part 23 is close to and faces the electrode 40 on the outer-periphery surface of the surge absorbing element 16 and is conductively connected with the electrode 40. The connection part 23 involves a first bending surface part 25 and a second bending surface part 27, thereby clamping the winding of an armature coil between them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating electric machine in which a surge absorbing element used for eliminating noise generated when the rotating electric machine is operated is attached to a commutator, and a method of manufacturing the same.

[0002]

2. Description of the Related Art In a rotating electric machine such as a motor device or a generator, a rotor side and a stator are connected via a commutator provided on the rotor and a brush provided on the stator. There is a configuration in which the motor is electrically connected to the side, and a typical example of such a rotating electric machine includes a DC generator and a DC motor.

[0003] The spark discharge generated between the commutator and the brush during the operation of the rotating electric machine generates undesired electrical noise in terms of the function of the rotating electric machine and the operation of surrounding electronic devices. And the brush may be worn out quickly, resulting in deterioration of its durability. Therefore, conventionally, in order to suppress the occurrence of the above-described spark discharge, a surge absorbing element such as a ring-shaped varistor is attached to the commutator.

FIGS. 10A and 10B show an example of a conventional DC motor rotor structure. The rotor includes an armature core 12 attached and fixed around a rotation shaft 110.
2, the armature coil 120 wound around the armature core 122, and the commutator 1 attached and fixed to the rotating shaft 110.
14 and a varistor 116 which is a surge absorbing element.

As shown in FIG. 10A, the commutator 114 has three commutator pieces 11 attached to the rotating shaft 110.
4a, on one end side of each commutator piece 114a,
A riser 118 connected to the armature coil 120 protrudes radially. A ring-shaped varistor 116 as a surge absorbing element and an armature coil 120 are connected to the riser 118 by soldering.

FIGS. 11 (A) and 11 (B) are perspective views of the varistor 116 shown in FIGS. 10 (A) and 10 (B) as a part thereof. The same number (here, three) of electrodes 130a are provided as the number of the electrodes 114a. By soldering a riser 118 extending from each commutator piece 114a to each electrode 130a of the varistor 116, the varistor 116 and the commutator piece 114a are electrically connected and the varistor 116 is electrically connected. Are mechanically attached and fixed to the riser 118. The riser 118 and the armature coil 1
The soldering connection with the winding 20 is made prior to the mounting of the varistor 116.

As described above, in the conventional method of mounting each electrode 130a of the varistor 116 and each riser 118 by soldering, a plurality of electrodes 130a corresponding to each riser 118 are formed in the varistor 116 in advance. Until the electrodes 130a of the varistor 116 are aligned with the 118, they cannot be fixed by soldering, which has been a problem in automating the varistor assembling work.

The electrode surface 130a of the varistor 116
And at the time of connection with the riser 118, the arrow a in FIG.
As described above, there is a problem that the solder 140 flows from the riser into the brush sliding surface 114b of the commutator. This is because, in the normal motor, the direction of arrow A in FIG.
This is because they are arranged with the direction of arrow B facing upward. Further, there is a problem that the solder flux scatters on the brush sliding surface of the commutator.

[0009] In addition, Japanese Utility Model Application No. 6-13375, Japanese Utility Model Application No. 6-77475
And Japanese Patent Application Laid-Open No. 7-327345 have been proposed.

However, in Japanese Unexamined Utility Model Publication No. 6-77475, since the riser is not connected to the outer peripheral surface of the varistor, each electrode of the varistor is formed at a hidden position on the back surface of the varistor, and visibility at the time of alignment is poor. This lowers the workability for assembling the varistor, becomes a serious problem that hinders automation, and also increases the cost of the rotor to be manufactured.

In Japanese Patent Laid-Open No. 7-327345, the connection between the winding and the riser is performed by fusing, and the other part of the riser is swaged by varistoring. For this reason, since the riser and the varistor electrode swaged by the fusing do not come to a position facing each other, a skilled operation such as soldering and electrical connection is required. Also, the riser needs to be electrically connected to the windings, which reduces the reliability of the varistor connection.

Further, in Japanese Utility Model Application Laid-Open No. 6-13375, the terminals extending in the radial direction are bent in a U-shape. However, since the terminals are formed so as to tighten the varistor, no soldering is performed. In addition, the U-shaped bent portion must be bent in the assembling process, which increases the number of steps.

The present invention has been made to solve the above-mentioned technical problems, and has as its object the following:
It is an object of the present invention to provide a rotating electric machine capable of easily and automatically attaching a surge absorbing element to a commutator, and further improving connection workability and reliability, and a method of manufacturing the same.

[0014]

(1) A rotating electric machine according to the present invention comprises: a commutator formed including a rotating shaft, a plurality of commutator pieces fixed around the rotating shaft; Armature coil conductively connected to the armature, and a ring-shaped surge absorbing element having an electrode on an outer peripheral surface thereof, which is located around the outer periphery of the commutator, and the commutator piece, A plurality of commutator piece bodies fixed to the rotating shaft;
A mounting portion that extends radially from the main body of the commutator piece and on which the surge absorbing element is mounted; and a wiring that is formed to extend from the mounting portion and that is electrically connected to a winding of the armature coil. And a connection portion, wherein the distal end portion of the mounting portion is bent, and the connection portion is close to and opposed to the electrode on the outer peripheral surface of the surge absorbing element, and is electrically connected to the electrode. It is characterized by.

According to the present invention, the connection portion of each commutator piece is formed so as to be close to and opposed to an electrode on the outer peripheral surface of the surge absorbing element. Therefore, after forming a commutator by fixing a plurality of commutator pieces to the rotating shaft, when the surge absorbing element is mounted on the mounting portion of each commutator piece and attached to the commutator, the outer periphery of the surge absorbing element is Is inscribed in each connection part, the surge absorption element can be accurately positioned by the connection part of the commutator piece. Therefore, the surge absorbing element can be placed at a predetermined position without the need for an alignment operation between the electrode formed on the surge absorbing element and the connection portion of the commutator piece. This is extremely effective in facilitating the mounting operation and assembling automation. In addition, rotary electric power having a good mechanical balance of the armature can be obtained.

[0016] Further, since the connection portion of each commutator piece is formed so as to be in close proximity to the electrode on the outer peripheral surface of the surge absorbing element, solder connection between the connection portion and the surge absorbing element, and Since the soldering connection between the connection portion and the winding of the armature coil can be performed almost simultaneously at almost the same portion, the work efficiency and reliability of the soldering connection are improved.

Further, since the soldering operation can be performed from the side of the commutator, it is not necessary to put a soldering iron in a narrow area, the visibility of the soldering work area is high, and The soldering operation can be easily and reliably performed.

Further, since the electrode formed on the outer peripheral surface of the surge absorbing element and the connection portion of the commutator piece are closely opposed to each other, the connection portion can function as a stopper against rotational centrifugal force, The surge absorbing element can be firmly fixed. Further, since the length of the mounting portion can be reduced, the size of the rotating electric machine can be reduced.

(2) In the rotating electric machine according to the present invention, the connection portion is formed by bending a distal end portion of the mounting portion, and the first bending portion is located in close proximity to an electrode of the surge absorbing element. A second bent surface portion formed between the first bent surface portion and the first bent surface portion so as to bend the armature coil between the first bent surface portion and the first bent surface portion; , Is included.

According to the present invention, by forming the cross section of the connection portion into a U-shape, when soldering and connecting, the solder is held in that area, and the solder flows into the sliding surface of the commutator. The possibilities are greatly reduced.

In addition, the first bent surface portion and the electrode of the surge absorbing element are closely opposed to each other, and the first bent surface portion and the second bent surface portion are opposed to each other.
Since the winding of the armature coil is connected between the first bent surface portion and the solder connection portion of the surge absorbing element, the first and second bent portions are connected to the first and second bent portions. A connection portion having a bent surface portion and a soldered connection portion between the winding of the armature coil are close to each other. Therefore, these soldering connections can be performed almost simultaneously, and work efficiency and connection reliability are improved.

(3) In the rotating electric machine according to the present invention, the first bent surface portion has a first bent surface portion main body, and a first introduction projection extending from the first bent surface portion main body. First
The introduction projection is characterized in that the first bent surface portion main body extends in a direction substantially opposite to a direction in which the first bent surface portion main body extends from the placement portion.

According to the present invention, when the winding of the armature coil extending from a position closer to the rotation axis than the connection portion is started to be entangled with the connection portion, the winding of the armature coil is rotated by the first introduction projection. Side of the armature coil can be prevented from being displaced or loosened from the connection portion, and the first bent surface portion and the second bent surface portion can be prevented from being loosened.
The winding of the armature coil can be guided and connected to the boundary region of the bent surface portion.

(4) In the rotating electric machine according to the present invention, the second bent surface portion has a second bent surface portion main body and a second introduction projection extending from the second bent surface portion main body. Second
The introduction protrusion extends in substantially the same direction as the direction in which the first bent surface portion main body extends from the placing portion, and is inclined so as to be away from the rotation axis as approaching the end portion. .

According to the present invention, even if the position where the winding of the armature coil is entangled is slightly shifted in the direction away from the rotation axis, the first position is inclined away from the rotation axis as it approaches the end. Since the winding of the armature coil is guided to the boundary region between the first bent surface portion and the second bent surface portion by the 2 introduction projection, the winding of the armature coil is relatively easily connected to a predetermined position of the connection portion. be able to.

(5) The rotating electric machine according to the present invention, wherein the connection portion has an introduction groove formed by narrowing a bent portion between the first bent surface portion and the second bent surface portion. Features.

According to the present invention, since the winding of the armature coil can be positioned at the position of the introduction groove and tangled, the winding of the armature coil can be easily positioned at a predetermined position of the connection portion. Can be connected.

(6) A method of manufacturing a rotating electric machine according to the present invention, comprising: a rotating shaft; a commutator fixed around the rotating shaft; an armature coil conductively connected to the commutator; A ring-shaped surge absorbing element having a plurality of electrodes on an outer peripheral surface thereof, wherein the plurality of commutator segments are provided over the outer peripheral surface of the rotating shaft. A first step of forming the commutator by arranging a plurality of the commutator pieces, and a protruding end of the mounting portion protruding from each of the commutator pieces is formed so as to be close to and opposed to each of the electrodes. A second connection for connecting each armature coil winding to each connection portion
A third step of inserting the ring-shaped surge absorbing element through the rotating shaft, placing the surge absorbing element on each of the mounting portions, and arranging each of the electrodes and the connection portion to face each other. And a step.

According to the present invention, the electrodes used for connection with the commutator pieces are formed over the outer peripheral surface of the ring-shaped surge absorbing element. This surge absorbing element is inserted through the rotating shaft, and the electrodes of the surge absorbing element and the connection portions of the respective commutator pieces are brought into close proximity to each other, and are moved until they come into contact with the mounting portions of the respective commutator pieces. Place.

Therefore, when the surge absorbing element is attached to the commutator, the surge absorbing element is positioned by making the electrodes of the surge absorbing element and the connection portions of the respective commutator pieces closely face each other. Therefore, the surge absorbing element can be attached to the commutator without performing positioning between the electrode formed on the surge absorbing element and the connection portion of each commutator piece. As a result, the work of mounting the surge absorbing element can be easily and automatically performed, and the connection reliability is improved.

In particular, since the electrodes formed on the outer peripheral surface of the surge absorbing element and the connection portions of the respective commutator pieces are closely opposed to each other, the work area in the work for mounting the surge absorbing element and the like is reduced. High visibility. Therefore, the workability in such work is good, and the work of attaching the surge absorbing element to the commutator can be more easily automated. Since the electrodes of the surge absorbing element are often connected to the connection portions of the respective commutator pieces by soldering or the like, such good workability is important.

(7) In the method of manufacturing a rotating electric machine according to the present invention, each of the connection portions may include a first bent surface portion facing the electrode of the surge absorbing element, and a cross section substantially U-shaped from the first bent surface portion. And a second bent surface portion which is bent in a letter shape and holds the winding of the armature coil between the first bent surface portion and the first bent surface portion. The method further comprises a step of crimping each of the first and second bent surface portions with the winding being sandwiched therebetween.

According to the present invention, each of the armature coils is crimped by pressing the first and second bent surfaces provided on the connection portion of each commutator piece with the armature coil windings therebetween. Can be connected to the respective connection portions, the commutator pieces can be electrically connected to the armature coils, and the windings of the armature coils can be fixed.

(8) In the method for manufacturing a rotating electric machine according to the present invention, after the third step, each of the connection portions and each of the electrodes are connected by soldering, and each of the armature coils is wound. The method further comprises the step of soldering and connecting a wire to each of the connection portions.

According to the present invention, the first bent surface portion of the connection portion and the electrode of the surge absorbing element are in close proximity to each other, and between the first bent surface portion and the second bent surface portion of the connection portion. Since the winding of the armature coil is connected to the connection portion, the connection portion and the solder connection portion of the surge absorbing element are close to the connection portion and the solder connection portion of the armature coil winding. Therefore, these soldering connections can be performed almost simultaneously, and a rotating electrical machine with high connection reliability can be manufactured.

[0036]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be specifically described below with reference to the drawings.

1. First Embodiment 1.1 Overall Configuration FIGS. 1A and 1B are a front view and a side view schematically showing a motor device which is an example of a rotating electric machine according to the present invention.

The motor device 1 of this embodiment has an armature core 32 fixedly mounted around the rotating shaft 10, an armature coil 30 wound around the armature core 32, and fixedly mounted on the rotating shaft 10. And a varistor 16 which is a ring-shaped surge absorbing element.

The commutator 14 is, as shown in FIG.
It is composed of a plurality of, for example, three commutator pieces 14a attached to the rotating shaft 10 via a cylindrical insulating material 12.

At one end of each commutator piece 14a, a riser portion 20 as a mounting portion connected to the armature coil 30 is radially projected. A ring-shaped varistor 16 serving as a surge absorbing element and an armature coil 30 are connected to the riser section 20 by soldering.

FIG. 3C is a perspective view showing the varistor 16 shown in FIGS. 1A and 1B.
6, the same number (in this case, three) of individual electrodes 40a as the number of the commutator pieces 14a are provided on the outer peripheral surface. Each commutator piece 1 is attached to each individual electrode 40a of the varistor 16.
By soldering the riser section 20 extending from the base section 4a, the varistor 16 and the commutator piece 14a are electrically connected, and the varistor 16 is mechanically attached and fixed to the riser section 20. ing. The riser unit 2
0 and the winding of the armature coil 30 are connected to the varistor 16
This is performed prior to mounting.

The varistor 16 is formed in a donut ring shape as shown in FIG. The ring-shaped varistor 16 has a rectangular cross section, and has an outer peripheral surface 16a, an inner peripheral surface 16b, and both end surfaces 16c, 16c as shown in FIG.

A ring electrode 40 is formed on the outer peripheral surface 16a of the varistor 16 over the entire periphery thereof. The ring electrode 40 is formed by, for example, coating a silver electrode on the entire outer peripheral surface 16a. Note that the covering region may be the entire outer peripheral surface 16a, or may be a band-like region. The ring electrode 40 is finally cut and removed partially between the riser 20 and the riser 20 as shown in FIG. 3C, and the ring electrode 40 is cut and separated into three pieces. It is separated into three individual electrodes 40a that are electrically insulated from each other by the part 42. Thus, the three risers 20 are independently soldered and connected to the three individual electrodes 40 a formed on the varistor 16.

1.2 Commutator Piece As shown in FIG. 2, the commutator piece 14a is formed in an arc shape, and a commutator piece main body 15 that slides on a brush (not shown) when the motor device rotates. A tongue-like piece extending from the commutator piece main body 15 in a direction intersecting with the rotation axis of the motor device (the r direction orthogonal to the rotation axis 10 by approximately 90 degrees) and mounted with the varistor 16 in contact with the end face 16c. A riser portion 20 and an extended end of the riser portion 20,
The armature coil 3 is formed to be bent so as to face the armature coil 3a.
And a connection portion 23 to which the 0 winding is conductively connected.

That is, the riser portion 20 is connected to the commutator piece main body 15.
Of the varistor 16, and a bent portion 21 formed by bending a part of the varistor 16 at approximately 90 degrees.

The connection portion 23 is provided on the mounting portion 22 of the riser portion 20.
Is bent in the direction (z) of approximately 90 degrees at the bent portion 24 with respect to the extension direction (r) of the varistor 16 so as to face the ring electrode 40 provided on the outer peripheral surface of the varistor 16. It has a bent surface portion 25 and a second bent surface portion 27 which is bent from the first bent surface portion 25 through a bent portion 26 into a substantially U-shaped cross section.

As a result, the winding of the armature coil 30 is connected to the region near the bent portion 26 between the first bent surface portion 25 and the second bent surface portion 27 having a substantially U-shaped cross section. By crimping the bent surface portion 25 and the second bent surface portion 27 and fusing, the U-shaped portion is crushed while holding the winding, and the crushed first bent surface portion 25 and the second bent surface portion 27 are formed. , And is substantially parallel to and closely opposed to the outer peripheral surface of the commutator piece main body 15. As a result, as shown in FIG. 2, the outer diameter of the varistor 16 up to the outer peripheral surface 16 a is slightly smaller than that of the first bent surface portion 25, and the inner peripheral surface 16
Since the inner diameter up to b is larger than the outer peripheral surface of the commutator piece main body 15, a space in which the varistor 16 can be inserted is secured.

1.3 Manufacturing Method Next, a method of manufacturing a rotating electric machine by assembling the varistor 16 of the present example with the commutator piece 14 is described with reference to FIGS.
This will be described with reference to FIG.

First, as shown in FIG.
The winding 30 of the armature coil 30 is provided in the region near the bent portion 26 between the first bent surface portion 25 and the second
Connect a.

Then, as shown in FIG. 3B, the first bent surface portion 25 and the second bent surface portion 27 are caulked and fused, so that the U-shaped portion is held while holding the winding 30a. The crushed and crushed first bent surface portion 25 and the second bent surface portion 27 are located substantially parallel to and opposed to the peripheral surface of the commutator piece main body 15.

Next, as shown in FIG. 2, the varistor 16 is inserted into the donut hole 16d of the varistor 16 from one end of the rotating shaft 10 so that the varistor 16 is rotated.
Of the commutator 14 to a position on the mounting portion 22 of the riser portion 20 of the commutator 14. This movement is simultaneously performed so that the outer peripheral surface 16a of the varistor 16 is inscribed in the respective connection portions 23, and in this state, the respective connection portions 23 are formed so as to be close to and oppose the outer peripheral surface 16a of the varistor 16. As a result, the varistor 16 is arranged substantially concentrically with the commutator 14. Thereby, the first bent surface portion 25 of the connection portion 23 and the ring electrode 40 of the varistor 16
Are substantially opposed to each other.

While maintaining such a position, FIG.
As shown in (1), solder is poured into a gap S between the opposing first bent surface portion 25 and the ring electrode 40 of the varistor 16 to obtain a solder joint. Thereby, the varistor 1
6 and the riser portion 2 of each commutator piece 14a
0 is electrically connected and mechanically fixed.
At this time, the winding 30a is also soldered to the connection portion 23 at the same time.

Since the ring electrode 40 is formed over the entire outer peripheral surface 16 a of the varistor 16, the rotation position of the varistor 16 is adjusted with respect to the connection portion 23 during the above-described electrical and mechanical connection operation. Without alignment, the ring electrode 40 of the varistor 16 and each riser section 2
0 can be opposed to the connection portion 23. Moreover, since the ring electrode 40 is provided on the outer peripheral surface 16a of the varistor 16, the visibility of the soldering work area is high, and the soldering work can be easily performed while visually observing the soldering location.

Next, as shown in FIG. 3C, the ring electrode 40 of the varistor 16 is connected between the portion facing the connection portion 23 and the other portion facing the connection portion 23. Then, the ring electrode 40 is separated into three individual electrodes 40a which are electrically insulated from each other by the three cutting / separating portions 42. Thereby, three connection parts 2
3 denotes three individual electrodes 40 formed on the varistor 16
and a is independently connected by soldering.

The cutting and removing may be performed by any method as long as the electrical conduction of the ring electrode 40 is cut off at this portion. For example, the ring electrode 4 may be cut by a grinder.
A part of the ring electrode 40 may be removed or a part of the ring electrode 40 may be removed by a laser.

By such a method, the varistor 16 is attached to the commutator 14 to form a rotor as shown in FIG.

1.4 Functions and Effects of First Embodiment As described above, according to the present embodiment, the position of the varistor is determined by the riser portion and the connection portion of the commutator.
No positioning work is required. For this reason, it is extremely effective in assembling automation. Further, since the positioning is reliably performed, it is possible to assemble a motor device having a good mechanical balance of the armature.

Further, since the soldering work can be performed from the side of the commutator, it is not necessary to insert a soldering iron in a narrow area, the visibility of the soldering work area is high, and the soldering can be easily performed while visually observing the soldering location. Work can proceed. Further, since the portions to be soldered are close to each other, no extra length is required for the soldering portion.

Further, since the ring electrode 40 (individual electrode 40a) formed on the outer peripheral surface 16a of the varistor 16 and the connection portion 23 of each commutator piece 14a are close to each other, the connection portion 23 is rotated. It can function as a stopper against centrifugal force, and the varistor 16 can be firmly fixed. Further, since the length of the riser section 20 can be reduced, the size of the motor device 1 can be reduced.

Further, since the first bent surface portion 25 and the ring electrode 40 face each other and the winding is connected between the first bent surface portion 25 and the second bent surface portion 27, the connection portion 2
3 and the varistor 16, and the soldering connection between the winding of the armature coil 30 and the connection portion 23 can be performed almost simultaneously in almost the same portion, so that the work efficiency of the soldering connection is improved. And reliability is improved.

1.5 Modification of First Embodiment 1.5.1 The shape of the connection portion of the commutator piece may be as shown in FIG. 5 (A). That is, in the above embodiment, as shown in FIG. 2, the U-shaped end surface of the connection portion 23 is configured to face the rotation axis direction (Z direction), whereas the commutator piece shown in FIG. The connection part 52 of 50
The U-shaped end face is formed as a shape that faces in the direction V intersecting with the Z axis. When the commutator piece 50 having the connection portion 52 having such a shape is used, the same operation and effect as the above embodiment can be obtained.

1.5.2 The connection portion of the commutator piece may have a shape as shown in FIG. 5 (B). The commutator piece 60 has a shape in which the connection portion 62 has a substantially Z-shaped end surface, forms a third bent surface portion 64, and the substantially Z-shaped end surface faces in the direction V intersecting the Z axis. It is formed as. Even with such a configuration, the same operation and effect as those of the above embodiment can be obtained.

2. <2nd Embodiment> 2nd Embodiment differs in the connection part of each commutator piece from 1st Embodiment. Other points are the same as in the first embodiment, and a description thereof will be omitted. In the drawings, corresponding parts are denoted by the same reference numerals as in the first embodiment.

2.1 Commutator Piece FIGS. 6 to 9 are views showing a commutator piece 70 of the present embodiment, FIG. 6 is a perspective view, and FIG. 7 is a development before the commutator piece 70 is formed by bending. FIG. 8 is a plan view, and FIG. 9 is a front view.

As shown in these figures, the commutator piece 70 of the present embodiment is similar to the commutator piece 14a of the first embodiment in that the commutator piece main body 15 and the riser portion 20 as a mounting portion are , A connection portion.

The connection portion 71 is the same as the first embodiment in that it has first and second bent surface portions 72 and 76. However, the connection portion 71 in the present embodiment is
The first bent surface portion 72 is formed of a first bent surface portion main body 73 and a first bent surface portion main body 73.
A first introduction protrusion 74 extending from the bent surface portion main body 73 is formed. The first introduction projection 74 extends in a direction substantially opposite to the direction in which the first bent surface portion main body 73 extends from the riser portion 20.

As described above, the connection portion 71 according to the present embodiment is provided.
The first bent surface portion 72 has a first bent surface portion 73 extending in a direction substantially opposite to the direction in which the first bent surface portion body 73 extends from the riser portion 20.
The winding 30 of the armature coil 30 that extends from a position closer to the rotation shaft 10 than the connection portion 71 because of the introduction projection 74.
As shown in FIG. 6, when the wire 30 a starts to be tangled to the connection portion 71, the first introduction protrusion 74 prevents the winding 30 a from shifting toward the rotation shaft. Therefore, the armature coil 3
0 can be prevented from being displaced or loosened from the connection portion 71, and the winding 30 a of the armature coil 30 is provided in the boundary region between the first bent surface portion 72 and the second bent surface portion 76. Can be connected.

Further, in the present embodiment, the second bent surface portion 76 is formed to have a second bent surface portion main body 77 and a second introduction projection 78 extending from the second bent surface portion main body 77. . The second introduction projection 78 is provided in the first bent surface portion main body 7.
3 extends substantially in the same direction as the direction extending from the riser portion 20, and is formed so as to be inclined away from the rotating shaft 10 as approaching the end.

For this reason, the winding 30a of the armature coil 30
Even if the position where the entanglement is slightly deviated in the direction away from the rotation shaft 10, the first introduction surface portion 78 and the second introduction surface portion 76 are inclined by the second introduction protrusion 78 inclined away from the rotation shaft 10. Since the winding 30a is guided to the boundary region of
The winding 30a of the armature coil 30 can be connected to a predetermined position of the connection portion 71.

The connecting portion 71 is connected to the first bent surface portion 7.
It is formed with an introduction groove 79 formed by constricting the bent portion 26 between the second and second bent surface portions 76. Therefore, since the winding 30a of the armature coil 30 can be positioned at the position of the introduction groove 79 and tangled, the winding 30a of the armature coil 30 can be relatively positioned at a predetermined position of the connection portion 71. It can be easily connected.

The commutator piece 70 of this embodiment is similar to that of FIG.
As is clear from the development shown in FIG. 1, one metal material can be cut out and bent.

2.2 Modification of First Embodiment 2.2.1 In the above description, the first bent surface 72 is
The example in which the first bent surface portion main body 73 includes the first introduction protrusion 74 extending in a direction substantially opposite to the direction extending from the riser portion 20 has been described. However, the first bent surface portion 72 further includes:
The first bent surface portion main body 73 may extend substantially in the same direction as the direction in which the first bent surface portion main body 73 extends from the riser portion 20, and may include a protrusion positioned closer to the rotation axis as approaching the end. Thus, even if the position where the winding 30a of the armature coil 30 is entangled is slightly shifted in the direction close to the rotating shaft 10, the first protrusion is positioned closer to the rotating shaft 10 as it approaches the end. Since the winding 30a is guided to the boundary region between the bent surface portion 72 and the second bent surface portion 76, the winding 30a of the armature coil 30 can be connected to a predetermined position of the connection portion 71.

3. <Modifications> The present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the present invention or within the equivalent scope of the claims.

3.1 For example, the surge absorbing element is not limited to a varistor, but may be any element capable of suppressing a surge voltage.

3.2 In each of the above embodiments, the varistor 16 having a rectangular cross section is used as the surge absorbing element, and the ring electrode 40 is provided on the outer peripheral surface 16a. However, since the cross-sectional shape of the surge absorbing element is not limited to a rectangular shape, when the surge absorbing element has another cross-sectional shape, a ring electrode may be formed at a position on the outer peripheral surface corresponding to the cross-sectional shape.

3.3 The commutator of the present invention is not limited to the one used for a motor device, but may be one used for a rotating electric machine, for example, a power generator.

[Brief description of the drawings]

FIGS. 1A and 1B are a front view and a side view showing an outline of a rotor of a motor device according to a first embodiment.

FIG. 2 is an exploded perspective view schematically showing a mounting state of a varistor in the motor device of FIG.

FIGS. 3A, 3B, and 3C are explanatory views schematically showing a varistor mounting process. FIGS.

FIG. 4 is a schematic perspective view of the rotor shown in FIG. 1;

FIGS. 5A and 5B are schematic perspective views showing a modification of the commutator piece of the first embodiment.

FIG. 6 is a perspective view showing a commutator piece according to a second embodiment.

FIG. 7 is a developed view showing a state before the commutator pieces shown in FIG. 6 are bent and formed.

FIG. 8 is a plan view showing a commutator piece according to a second embodiment.

FIG. 9 is a front view showing a commutator piece according to a second embodiment.

10A and 10B are a front view and a side view schematically showing an example of a rotor of a conventional rotating electric machine.

11A and 11B are diagrams schematically showing a process of attaching a varistor and a riser of the rotary electric machine in FIG. 10, wherein FIGS. 11A and 11B are perspective views, and FIG. 11C is a sectional view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Rotation axis 14 Commutator 14a, 50, 60, 70 Commutator piece 15 Commutator piece main body 16 Varistor (surge absorption element) 16a Outer peripheral surface 20 Riser part (mounting part) 23, 52, 62, 71 Connection part 25, 72 first bent surface portion 27, 76 second bent surface portion 30 armature coil 30a winding 40 ring electrode 40a individual electrode 73 first bent surface portion main body 74 first introduction protrusion 77 second bent surface portion main body 78 second introduction protrusion 79 Introductory groove

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5H613 AA01 BB04 GA04 GA05 GA06 GB01 GB02 GB09 KK01 KK07 KK08 KK10 PP05 PP07 PP08 SS09

Claims (8)

[Claims] A commutator formed including a plurality of commutator pieces fixed around the rotation shaft; an armature coil conductively connected to the commutator; A ring-shaped surge absorbing element located around the outer periphery and having an electrode on the outer peripheral surface, a rotating electric machine having: a plurality of commutator piece main bodies fixed to the rotating shaft; A mounting portion that extends radially from the main body of the commutator piece and on which the surge absorbing element is mounted; and a wiring that is formed to extend from the mounting portion and that is electrically connected to a winding of the armature coil. And a connection portion, wherein the connection portion has a distal end portion of the mounting portion bent, and is closely opposed to the electrode on the outer peripheral surface of the surge absorbing element;
A rotating electric machine, which is electrically connected to the electrode. 2. The connection portion according to claim 1, wherein the connection portion has a first bent surface portion formed by bending a distal end portion of the mounting portion, and is located in close proximity to an electrode of the surge absorbing element. A second bent surface portion formed to be bent in a substantially U-shaped cross section from the first bent surface portion and sandwiching the winding of the armature coil between the first bent surface portion and the first bent surface portion. A rotating electric machine characterized by the above-mentioned. 3. The first bent surface portion according to claim 2, wherein the first bent surface portion includes a first bent surface portion main body and the first bent surface portion main body.
A first introduction projection extending from the curved surface body, wherein the first introduction projection extends in a direction substantially opposite to a direction in which the first curved surface body extends from the placement section. Characteristic rotating electric machine. 4. The second curved surface portion according to claim 2, wherein the second curved surface portion includes a second curved surface portion main body and the second curved surface portion main body.
A second introduction protrusion extending from the curved surface portion main body, wherein the second introduction protrusion extends in substantially the same direction as the direction in which the first curved surface portion main body extends from the placing portion, and has an end. A rotating electric machine characterized by being inclined so as to move away from the rotation axis as approaching the part. 5. The connection groove according to claim 2, wherein the connection portion includes an introduction groove formed by narrowing a bent portion between the first bent surface portion and the second bent surface portion. A rotating electric machine characterized by having: 6. A rotating shaft, a commutator fixed around the rotating shaft, an armature coil conductively connected to the commutator, and a plurality of commutators surrounding an outer periphery of the commutator. And a ring-shaped surge absorbing element having the electrodes described above, comprising: a plurality of commutator pieces arranged along an outer peripheral surface of the rotating shaft to form the commutator. A step of winding the armature coil on each connection portion formed so as to be close to and opposed to each of the electrodes at the protruding end of the mounting portion protruding from each of the commutator pieces; The second to connect each
A third step of inserting the ring-shaped surge absorbing element through the rotating shaft, mounting the surge absorbing element on each of the mounting portions, and arranging each of the electrodes and the connection portion to face each other. A method for manufacturing a rotating electric machine, comprising: 7. The connection portion according to claim 6, wherein each of the connection portions is formed of a first bent surface portion facing an electrode of the surge absorbing element, and is bent in a substantially U-shaped cross section from the first bent surface portion. And a second bent surface portion for pinching the winding of the armature coil with the first bent surface portion, wherein after the second step, the winding of the armature coil is sandwiched. A method for manufacturing a rotating electric machine, further comprising a step of crimping each of the first and second bent surface portions. 8. The method according to claim 7, wherein, after the third step, each of the connection portions and each of the electrodes are connected by soldering, and the winding of the armature coil and each of the connection portions are connected to each other. A method for manufacturing a rotating electric machine, further comprising a step of soldering and connecting.