JP2010124542A - Commutator, armature and motor equipped with the commutator, manufacturing method of the armature, and manufacturing method of motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a terminal piece for joining together a segment for rectification and a winding from being melted down during fusing without removing the insulating coating of the winding in advance. <P>SOLUTION: An armature 10 is formed by fixing an armature core 13 and a commutator 20 on the shaft 11 of a motor M. A segment 23 for rectification provided on the outer circumferential surface of the commutator 20 is provided with a hooked terminal piece 25 for joining a winding 12 wound on the armature core 13. In the terminal piece 25, there are formed opposite faces 25a, 25b that are coupled together at a coupling portion 25c and clamp a winding 12 in-between and a protrusion 26 cut and erected from the outer opposite face 25a. This protrusion 26 is brought into contact with the opposite face 25b and energization is carried out by welding electrodes P1, P2 under pressure. Thus energization can be carried out from not only the coupling portion 25c but also the protrusion 26. Therefore, the position where energization heating occurs is dispersed and wire connection can be completed before the terminal piece 25 is melted down. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a commutator, an armature including the commutator, a method of manufacturing the armature, and a method of manufacturing a motor, and in particular, manufacturing using fusing (resistance welding) as a method of joining a winding and a rectifying segment. The present invention relates to a commutator, an armature including the commutator, a method for manufacturing the armature, and a method for manufacturing a motor.

  Conventionally, fusing (resistance welding) is generally used as a joining method for joining a winding with an insulating film wound around an armature core of a motor to a plurality of rectifying segments constituting a commutator. (For example, refer to Patent Document 1). In fusing, the winding is locked to a fusing terminal piece formed in a hook shape on the outer peripheral side of each rectifying segment, and the terminal piece is energized to generate heat using a resistance welding device. The insulation film of the winding is lost and the winding and the terminal piece are joined.

JP 2000-84777 A

  In this way, the commutator is provided with a fusing terminal piece, but in order to achieve miniaturization and high output of the motor, the terminal piece can be miniaturized or a large number of windings can be joined to the terminal piece. The diameter is increased or a plurality of windings are joined to one terminal piece. However, if the terminal piece is reduced in size, or the diameter of the winding is increased or the number of windings is increased, the insulation film of the winding is thermally deteriorated and disappears by the heat generated in the terminal piece by energization. There is a problem in that the bending portion of the piece may cause fusing due to overcurrent, resulting in a failure in joining. Therefore, conventionally, in order to solve such a problem, the insulation film of the winding is removed in advance and then the terminal pieces are energized and joined.

  Also, in order to prevent the bent part of the terminal piece from fusing due to overcurrent, the free end opposite to the bent part of the terminal piece is bent to the inner peripheral side, and the free end is used for rectification during fusing A technique may be used in which the heat generation points are dispersed by energizing the free end side by contacting the segment side.

  However, it takes time to remove the insulating film at the joint in advance, and there is a problem that the joining process is complicated. In addition, when the free end of the terminal piece is bent to the inner circumference side, the hook-shaped terminal piece is difficult to deform, and the contact area between the terminal piece and the winding decreases, so the bonding strength of the winding decreases. There was a problem to do.

In view of such problems, the object of the present invention is not to remove the insulating film of the winding in advance, and the commutator in which the winding is firmly fixed at the time of fusing and the terminal portion does not melt. An object is to provide an armature and a motor including a commutator.
Another object of the present invention is to provide a method of manufacturing an armature and a motor by applying a method of joining a winding and a terminal portion in which the winding is firmly fixed during fusing and the terminal portion does not melt. It is to provide a method.

  According to the commutator according to claim 1, the problem is that the fixed portion fixed to the shaft of the rotating electrical machine, and a plurality of rectifiers arranged in the circumferential direction on the outer peripheral surface of the fixed portion and electrically insulated from each other. A commutator provided with a terminal portion for joining the winding to the winding, the terminal portion having a facing surface separated by a predetermined dimension, At least one is formed with a convex portion extending toward the other opposing surface, and the convex portion can be deformed while being pressed against the other opposing surface by applying a predetermined pressure to the opposing surface. It is solved by being done.

  With the above configuration, the convex portion is formed so as to be deformable while being pressed against the other facing surface, so that the distance between the facing surfaces is reduced in a state where the winding is disposed between the facing surfaces. Thus, the winding can be sandwiched between the terminal portions while ensuring conduction between the convex portion and the other facing surface. That is, since the terminal part can be heated by energization from the convex part, the heat generation position can be dispersed, and even if fusing is performed using the winding from which the insulating film is not removed, the terminal The connection between the winding and the terminal portion can be completed before the portion is melted.

  Specifically, as in claim 2, the terminal portion includes a thin plate-like terminal piece that extends from the armature core side end of the rectifying segment and is bent into a substantially U shape. The opposing surface is formed by a plate surface on the free end side of the terminal piece and a plate surface on the base end side of the terminal piece or an outer peripheral surface of the rectifying segment, and the convex portion is formed on the terminal piece. It is preferable that a part of any one of the plate surfaces is cut and raised.

  With the above configuration, the convex portion is formed by cutting and raising a part of one of the plate surfaces of the terminal piece so that the opening is formed in a portion of the opposing surface. A narrow portion is formed on the opposite surface. For this reason, since heat can be generated even on the opposite surface by the current from the convex portion, the heat generation position can be more effectively dispersed, thereby fusing using a winding from which the insulating film has not been removed. Even if it carries out, the connection of a coil | winding and a terminal part can be completed before the fusing of a terminal part generate | occur | produces. In addition, the area of the terminal strip that comes into contact with the winding is reduced, and the terminal strip can be easily press-fitted into the insulating coating of the winding, so that it is easy to remove the insulating coating at the portion where the terminal strip is press-fitted. The winding and the terminal piece can be easily connected.

At this time, as shown in claim 3, it is preferable that an opening is formed in a part of the facing surface.
As described above, since the opening is formed in a part of the facing surface, a portion where the width of the facing surface becomes narrow is generated, so that the facing surface can be easily press-fitted into the insulating film of the winding, and the heating is performed. In this case, it is easy to remove the insulating film in the portion where the opposing surface is press-fitted.

According to a fourth aspect of the present invention, it is more preferable that the terminal portion is configured such that the winding can be disposed at a position between the convex portion and a connecting portion that connects the opposed surfaces.
Thus, the winding can be more reliably held by being configured to be able to dispose the winding at a position between the convex portion and the connecting portion that connects the opposing surfaces.

According to the armature according to a fifth aspect, the problem is solved by including the commutator according to any one of the first to fourth aspects.
Thus, the armature of the present invention can be obtained with the features of claims 1 to 4.

  According to the method of manufacturing an armature according to claim 6, the problem is that an armature core around which a winding is wound, a shaft to which the armature core is fixed, and a plurality of pieces electrically insulated from each other. A commutator having a commutation segment and fixed to the shaft, wherein the armature is separated from the terminal portion to which the winding of the commutation segment is locked by a predetermined dimension. A convex portion forming step of forming a convex portion extending from one of the opposing surfaces toward the other and a winding temporarily fixed to the terminal portion between the opposing surfaces. A wiring step of pressing the pressure, energizing the terminal portion to generate heat, causing the insulation film of the winding to disappear, exposing the core wire of the winding, and conducting the core wire and the terminal portion; In the connecting step, the convex portion is placed in front of the other By pressure contact at a predetermined pressure on the opposing surfaces, it is solved by performing a protrusion deforming step for deforming the protrusions while energized between said convex portion and the other of the opposing surfaces.

  According to the above configuration, the terminal portion that can be electrically connected to the rectifying segment has a shape having an opposing surface, and the distance between the opposing surfaces is reduced in a state where the winding is locked between the opposing surfaces. When the terminal portion is deformed by being pressed, the convex portion formed on the facing surface can be deformed while being pressed against the opposite facing surface. In other words, the windings can be held between the terminal parts while securing the conduction between the convex part and the other facing surface, so that the heat generation position is dispersed by causing the terminal part to generate heat even by energization from the convex part. Thus, even if fusing is performed using a winding from which the insulating film has not been removed, the connection between the winding and the terminal portion can be completed before the fusing of the terminal portion occurs. .

Further, as in claim 7, in the wiring step, when the winding is sandwiched between the opposing surfaces and pressed, a part of the terminal portion is pressed into the insulating film of the winding. Is preferred.
Thus, in the connection step, the thickness of the insulating film at the press-fitted portion can be reduced by configuring the terminal part to be press-fitted into the insulating film of the winding. Therefore, when the terminal part is energized and generates heat, and the heat is applied to the thinned part of the insulating film through the convex part and its peripheral part, the thinned part of the insulating film is conventionally deteriorated due to thermal deterioration. It disappears in a shorter time and the core wire is exposed, and the core wire and the terminal portion are in a conductive state.

  In this way, by combining the press-fitting of the convex part into the insulating film by pressurization and the disappearance of the insulating film due to heat generation due to heat generation, compared to the conventional method of removing the insulating film only by thermal deterioration. Thus, the insulating film can be removed more quickly. Therefore, before the connecting portion of the terminal portion is fused by an overcurrent as in the prior art, the core wire can be exposed to complete the welding joint with the terminal portion. In other words, even if fusing is performed without previously removing the insulating film of the winding, the welding and bonding between the winding and the terminal can be completed before the terminal is melted. Therefore, there is no problem in joining the rectifying segment and the winding, which is preferable.

Further, according to the motor according to claim 8, the subject is a motor including a winding having an insulating film and a terminal portion connected to the winding, and the terminal portion is separated by a predetermined dimension. A convex portion extending to the other opposing surface is formed on at least one of the opposing surfaces;
By applying a predetermined pressing force to the facing surface, the convex portion is formed so as to be deformable while being pressed against the other facing surface.
Furthermore, according to the method for manufacturing a motor according to claim 9, the object is a method for manufacturing a motor including a winding having an insulating film and a terminal portion connected to the winding. A convex portion forming step for forming a convex portion extending from one side of the opposing surface to the other while forming an opposing surface spaced apart by a predetermined dimension on the terminal portion to which The winding is pressed with a predetermined pressure between the opposing surfaces and the terminal portion is energized to generate heat, thereby eliminating the insulation film of the winding and exposing the core of the winding. And a connecting step for connecting the terminal portion and the terminal portion, and in the connecting step, the convex portion is brought into pressure contact with the other opposing surface with a predetermined pressure, and the convex portion and the other opposing surface are energized. A convex deformation process for deforming the convex while It is solved by performing.

  As described above, the present invention is not limited to the joining of the terminal portion conducted to the rectifying segment and the winding wound around the armature core, but an insulating film such as the joining of the winding and the terminal portion of the brushless motor is provided. The present invention can be widely used as a motor that joins a winding having a terminal portion provided to the motor and a manufacturing method of such a motor. As a result, even if fusing is performed without previously removing the insulating film of the winding, the connection between the winding and the terminal can be completed before the fusing of the terminal occurs. Therefore, there is no problem in joining the terminal portion and the winding, which is preferable.

  According to the first to fifth aspects of the present invention, since heat can be generated also on the opposite surface by the current from the convex portion, the heat generation position can be effectively dispersed, and thereby the winding without removing the insulating film. Even if fusing using a wire, before the fusing of the terminal portion can occur, the connection between the winding and the terminal portion can be completed, and the area of the terminal piece in contact with the winding decreases, Since the terminal piece can be easily press-fitted into the insulating film of the winding, it is easy to remove the insulating film at the portion where the terminal piece is press-fitted. Accordingly, it is possible to easily connect the winding and the terminal piece, and to provide a commutator in which the winding is firmly fixed during fusing and the terminal portion does not melt, and an armature including the commutator. be able to.

According to the sixth and seventh aspects of the present invention, since the heat can be generated also on the opposite surface by the current from the convex portion, the heat generation position can be effectively dispersed, and thereby the winding without removing the insulating film. Even if fusing using a wire, before the fusing of the terminal portion can occur, the connection between the winding and the terminal portion can be completed, and the area of the terminal piece in contact with the winding decreases, Since the terminal piece can be easily press-fitted into the insulating film of the winding, it is easy to remove the insulating film at the portion where the terminal piece is pressed in, and therefore, the wiring and the terminal piece can be easily connected. In addition, it is possible to provide a method for manufacturing an armature to which a method of joining a winding and a terminal portion in which the winding is firmly fixed during fusing and the terminal portion is not melted is applied.
According to the eighth and ninth aspects of the present invention, the configuration including the convex portion cut and raised from the terminal piece is a method for manufacturing a motor for joining a winding having an insulating film and a terminal portion provided in the motor. Can be widely used.

  As described above, in the present invention, the insulating film can be removed before the bent part of the terminal portion is melted by overcurrent without removing the insulating film of the winding at the joint part in advance. Therefore, before the terminal portion is melted, the bonding between the winding and the terminal portion can be completed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that members, arrangements, and the like described below do not limit the present invention, and it goes without saying that various modifications can be made in accordance with the spirit of the present invention.

(First embodiment)
1 to 8 relate to a first embodiment of the present invention, FIG. 1 is a sectional view of a motor, FIG. 2 is a perspective view of an armature, FIG. 3 is a sectional perspective view of a commutator, FIG. FIG. 5 is a perspective view and a sectional view of the terminal portion, and FIGS. 6 to 8 are explanatory views showing a method of joining the terminal portion and the winding. Moreover, FIG. 9 is explanatory drawing of the terminal part which concerns on a modification.

An embodiment in which the armature 10 including the commutator 20 of the present invention is applied to the motor M shown in FIG. 1 will be described. The motor M can be suitably used as various drive devices such as automobile electrical equipment.
FIG. 1 is a cross-sectional view of the motor M. The motor M according to the present embodiment includes an armature 10 in which a winding 12 is wound around a shaft 11 whose one end is an output shaft of the motor M, and an armature 10 in which a commutator 20 is fixed, and an armature core. 13, a magnet 14 disposed so as to surround the outer periphery of the arm 13, a yoke housing 15 that accommodates the armature 10 and the magnet 14 therein, bearings 16 </ b> A and 16 </ b> B that rotatably support the shaft 11, and a commutator 20. The main components are a brush device 17 having a brush in contact with it, an end plate 18 that closes the opening of the yoke housing 15 on the commutator 20 side, and the like.

  As shown in FIG. 2, the armature 10 has an armature core 13 and a commutator 20 adjacent to and fixed to a shaft 11. The armature core 13 is a core member having a plurality of slots protruding in the radial direction of the shaft 11, and the winding 12 is wound by a predetermined winding type. The armature core 13 of this example is provided with an insulator 13a formed of resin or the like on the surface of the winding 12 in order to provide good insulation from the winding 12, but the insulator 13a is omitted. It is also possible to adopt the configuration described above.

As shown in FIG. 3, the commutator 20 is formed by arranging a plurality of rectifying segments 23 on the outer periphery of a fixing portion 22 having a through hole 21 for press-fitting and fixing the shaft 11. The rectifying segments 23 are electrically insulated from each other by adjacent commutator grooves 24 extending in the axial direction of the shaft 11.
The fixed portion 22 of the commutator 20 is made of, for example, resin, and the rectifying segment 23 is made of a conductive metal. The commutator 20 is formed by, for example, injecting resin into the inner peripheral side of a cylindrical metal member to form an integrally molded product in which a through hole 21 is formed at the center, and press-fitting and fixing the shaft 11 into the through hole 21. The metal member (commutator-forming plate material) on the side can be cut to form a commutator groove 24 in the axial direction, and a plurality of rectifying segments 23 can be separately formed. Note that the commutator groove 24 may be formed before press-fitting and fixing the integrally molded product to the shaft 11. Moreover, you may manufacture by assembling the fixing | fixed part 22 and the segment 23 for rectification | straightening instead of integral molding.

  The outer peripheral surface of the rectifying segment 23 is a slidable contact surface on the end plate 18 side where the brush is slidably contacted. On the other hand, on the armature core 13 side of each rectifying segment 23, a terminal piece 25 is provided as a terminal portion for electrical connection with the winding 12 respectively. The terminal piece 25 is formed in a thin plate shape by cutting one end side of the rectifying segment 23 to be thinner than the width of the rectifying segment 23. The terminal piece 25 is bent and folded toward the outer peripheral side of the rectifying segment 23 to be formed in a substantially U-shaped hook shape. Thus, the winding 12 can be easily locked by being formed in a hook shape.

The yoke housing 15 has a bottomed cylindrical shape, and a bearing mounting portion 15a is formed at the bottom so as to bulge. A bearing 16A that supports one end of the shaft 11 is disposed in the bearing mounting portion 15a. The bearing 16 </ b> B that supports the other end of the shaft 11 is disposed at the center of the end plate 18 that closes the opening of the yoke housing 15 on the commutator 20 side.
A magnet 14 as a stator of the motor M is fixed on the inner peripheral side of the cylindrical portion of the yoke housing 15. The magnet 14 is disposed so as to face the winding 12 wound around the armature core 13 via a predetermined gap.
The brush device 17 includes a brush that is held in contact with the surfaces of the plurality of rectifying segments 23, and is fixed inside the end plate 18 in this embodiment. When the commutator 20 rotates, the brush comes into sliding contact with the surface of the rectifying segment 23.

Next, a characteristic configuration of the present invention will be described.
In the present embodiment, as shown in FIG. 3, the terminal pieces 25 provided as the terminal portions in the respective rectifying segments 23 are bent and folded in a substantially U shape on the outer peripheral side of the commutator 20 to form a hook shape. ing. More specifically, as shown in FIGS. 4 and 5, the terminal piece 25 is configured such that the plate surface on the free end side and the plate surface on the base end side face each other, and are substantially spaced apart by a predetermined dimension. It is formed to have parallel opposing surfaces 25a and 25b and a substantially U-shaped connecting portion 25c that connects these opposing surfaces 25a and 25b. And the convex part 26 is formed in the opposing surface 25a as shown in FIG. 4, FIG. 4 and 5 are enlarged views (perspective view and sectional view) of a region A surrounded by a dotted line in FIG. 3, but FIG. 4 shows a state where the winding 12 is not locked, and FIG. 25 shows a state in which the winding 12 is locked.

As shown in FIG. 5B, when the winding 12 is locked between the opposing surfaces 25a and 25b, the convex portion 26 connects the winding 12 between the opposing surfaces 25a and 25b and the connecting portion. It is formed at a position where it can be held between 25 c and the convex portion 26.
The convex portion 26 is formed by cutting and raising a part of the facing surface 25a and bending it toward the facing surface 25b. More specifically, the convex portion 26 is cut at three sides in a substantially rectangular shape at the central portion of the facing surface 25a so as to keep the connection on the free end side (opposite side of the connecting portion 25c) of the facing surface 25a. A substantially rectangular region cut along the retained portion is formed by bending the rectifying segment 23 at a substantially right angle. Further, the gap between the tip of the convex portion 26 and the facing surface 25b is arbitrary, and is appropriately selected depending on the process for locking the winding 12 and the wire diameter of the winding 12.

  The convex portion 26 may be formed by cutting and raising a part of the opposing surface 25b and bending the opposing surface 25a toward the opposing surface 25a, or may be provided on each of the opposing surfaces 25a and 25b. Good. However, the convex part 26 shall be comprised with the intensity | strength which can deform | transform in the connection process mentioned later. In addition, in this embodiment, the free end side plate surface (opposing surface 25a) and the base end side plate surface (opposing surface 25b) are configured to face each other. The plate surface (opposing surface 25a) and the outer peripheral surface of the rectifying segment may be configured to face each other.

Here, the manufacturing method of the armature 10 in this embodiment is demonstrated.
(Projection forming process)
First, each of the plurality of rectifying segments 23 formed separately by forming commutator grooves 24 in the axial direction of the commutator forming plate material disposed on the outer peripheral side of the fixing portion 22 press-fitted and fixed to the shaft 11. A terminal portion to which the winding 12 is locked is formed. The terminal portions are formed as facing surfaces 25a and 25b separated by a predetermined size by folding terminal strips 25 provided on each rectifying segment 23 into a substantially U shape on the outer peripheral side of the commutator 20, and facing the facing surfaces 25a. A convex portion 26 extending toward the surface 25b is formed. The convex portion 26 is formed by cutting and raising a part of the facing surface 25a. Any known method can be used as appropriate.
In addition, after forming the convex part 26 in the terminal piece 25, the procedure which fixes the rectifying segment 23 to the shaft 11 and forms a commutator may be sufficient.

(Connection process)
The winding 12 extended from the armature core 13 side is locked between the opposing surfaces 25a and 25b of the hook-shaped terminal piece 25 and temporarily fixed. Then, by pressing the winding 12 temporarily fixed to the terminal piece 25 with a predetermined pressure between the opposing surfaces 25a and 25b, a part of the terminal piece 25 is pressed into the insulating film 12a of the winding 12, and By conducting current to the terminal piece 25 to generate heat, the insulating film 12a of the winding 12 is lost, the core wire 12b of the winding 12 is exposed, and a wire connecting step for connecting the core wire 12b and the terminal piece 25 so as to be conductive is performed.

(Projection deformation process)
In the connecting step, when pressing is applied between the opposing surfaces 25a and 25b, the convex portion 26 is pressed against the opposing surface 25b, and therefore, the convex portion 26 can be energized. At this time, by performing the convex part deformation process in which the convex part 26 is deformed while being pressed against the opposing surface 25b, the movement of the opposing surface 25a toward the opposing surface 25a is not hindered. Therefore, the winding 12 can be crushed by the facing surfaces 25a and 25b, and the winding 12 can be fixed to the terminal piece 25 more firmly.

The above-described connection process will be described in more detail with reference to the connection process illustrated in FIGS. Here, FIG. 6A, FIG. 7A, and FIG. 8A are schematic cross-sectional views in the rotational direction of the commutator 20, and FIG. 6B, FIG. 7B, and FIG. ) Is a schematic cross-sectional view of the commutator 20 in the axial direction.
As shown in FIGS. 6A and 6B, the welding electrode P1 of the resistance welding apparatus is brought into contact with the facing surface 25a side of the terminal piece 25, and the welding electrode P2 is brought into contact with the terminal surface 25b side and fixed. In a state where the back side of the portion 22 is supported by a jig (not shown), the terminal piece 25 sandwiched is pressed by pressing the welding electrode P1 in the direction of the arrow B1.

  As a result, as shown in FIGS. 7A and 7B, the terminal piece 25 is pressed against the winding 12, and the convex portion 26 is pressed against the opposing surface 25 b, so that electricity can be supplied from the convex portion 26. It becomes a state. When the pressing force reaches a predetermined value, the convex portion 26 is deformed and the opposing surface 25a moves toward the opposing surface 25b, so that the winding 12 sandwiched between the opposing surfaces 25a and 25b is crushed and the opposing surface 25a is It is press-fitted into the insulating film 12 a of the winding 12. The opposing surface 25a has an opening at the center due to the opening 25d formed by cutting and raising the convex portion 26, and the area in contact with the winding 12 is reduced. For this reason, the opposing surface 25a can be easily press-fitted into the insulating film 12a of the winding 12.

  In this state, when electricity is supplied to the welding electrodes P1 and P2, the terminal strip 25 generates heat due to overcurrent. The portion of the winding 12 where the terminal piece 25 (opposing surface 25a) has eroded easily disappears due to heat deterioration due to heat input from the terminal piece 25 that has generated heat because the insulating film 12a is thin. Thereby, as shown to Fig.8 (a), (b), the terminal piece 25 and the core wire 12b in the center part of the coil | winding 12 will contact, and will be in the state which can be conduct | electrically_connected. Even at this stage, the winding 12 is fixed by being held between the facing surfaces 25b and 25b because it is continuously pressed by the welding electrode P1.

When the energization is further continued, the terminal piece 25 and the core wire 12b are welded. That is, the terminal piece 25 is deformed by resistance heat and joined to the core wire 12b. In this way, the terminal piece 25 and the core wire 12b are joined to complete the joining by fusing, the winding 12 and the rectifying segment 23 are conducted, and the winding 12 is firmly fixed to the terminal piece 25. .
6 to 8, the number of windings 12 to be connected is two. However, the number of windings 12 to be connected may be one or three or more, and the material of the terminal piece 25 is particularly limited. Although it is not a thing, it can comprise also by the material currently used conventionally. Further, since the winding 12 is firmly held in a state of being held between the opposing surfaces 25a and 25b and between the connecting portion 25c and the convex portion 26, the portion in contact with the convex portion 26 and the connecting portion 25c. Insulating film 12a can be removed.

  In the above connection process, since the opening 25d is formed at the center of the opposing surface 25a due to the formation of the convex portion 26, the energized area of the opposing surface 25a is reduced, and the opposing surface 25a is likely to generate heat. That is, in the conventional terminal portion that does not include the raised protrusion 26 that is cut and raised, when the terminal piece 25 is energized, the heat generation position is concentrated on the connecting portion 25c, whereas in the present embodiment, the protrusion 26 is disposed on the opposing surface 25b. By energizing while being pressed against each other, heat can be generated even at the facing surface 25a, and the heat generation at the connecting portion 25c can be relatively relaxed. For this reason, a heat_generation | fever position disperse | distributes and it can prevent fusing by the connection part 25c. Since fusing hardly occurs, the terminal portion can be formed in a smaller size, or the commutator-forming plate material constituting the terminal piece 25 can be formed in a thinner plate thickness.

  According to the present embodiment, the terminal piece 25 is press-fitted into the outer part of the insulating film 12a, but the insulating film 12a is not completely removed by the press-fitting of the terminal piece 25, and the inner part of the insulating film 12a is not heated by energization heating. Removed. Therefore, the terminal piece 25 does not dig deeply into the core wire 12b, and the core wire 12b is not crushed and disconnected. In addition, since the insulating film 12a can be removed by heating even if current heating is performed in a state in which the terminal piece 25 is not press-fitted into the outer portion of the insulating film 12a, even if the pressure applied by the welding electrode P1 is reduced to some extent, substantially the same. The effect can be expected.

  The resistance welding apparatus used for the joining process may be an apparatus generally used for fusing, and a publicly known system can be used as a power supply control system and a pressurization system. In addition, the pressure contact of the terminal piece 25 to the winding 12 performed in the connection process is performed by pressurizing the facing surface 25a of the terminal piece 25 with the welding electrode P1 for energizing the winding 12. By performing pressurization and energization through the welding electrodes P1 and P2, the configuration of the apparatus used for the joining process is simplified.

  In the connection step, energization is started after first pressurizing with a predetermined pressure and the terminal piece 25 is press-fitted. However, the energization start timing may be different from the above method. For example, if energization is started simultaneously with pressurization, the terminal piece 25 can be easily press-fitted while the insulating film 12a is softened by heat.

In the above embodiment, the terminal piece 25 is formed by bending the free end side of the terminal piece 25 back to the base end side and bending it into a substantially U shape so that the opposing surfaces 25a, 25b are substantially parallel. The shape is not limited to this, and any shape that can form two surfaces capable of sandwiching the winding 12 may be used.
Moreover, in the said embodiment, although the terminal piece 25 was integrally formed in the end of the commutator segment 23, it is not limited to such a structure, The segment for commutators and a terminal part are electrically connected. What is necessary is just to be comprised.

  In the present embodiment, while the fixing portion 22 is supported by a jig from the back side, the terminal piece 25 is pressed by the welding electrode P1, but the terminal piece 25 is configured to be easily deformed, thereby fixing the fixing portion. It can be set as the process which does not use the jig | tool which supports 22 from the back side. Moreover, it is not necessary to use the jig | tool which supports the fixing | fixed part 22 from a back side by performing a connection process after fixing the fixing | fixed part 22 to the shaft 11. FIG. Furthermore, the opposing surfaces 25a and 25b may be formed so as to protrude from the fixing portion 22 toward the armature 10, and the terminal piece 25 may be sandwiched between the welding electrodes P1 and P2 and pressed.

(Modification example)
An example in which the above embodiment is modified will be described with reference to FIGS.
In the embodiment described above, the convex portion 26 is provided by cutting and raising the central portion of the facing surface 25a (see FIGS. 7A and 7B), but it is shown in FIGS. 9C to 9F. As described above, the convex portion 26 may be formed by bending the free end portion of the facing surface 25a toward the facing surface 25b. 9A, 9C, and 9E are top views of the terminal portions, and FIGS. 9B, 9D, and 9F are II sectional views, II-II sectional views, and III, respectively. It is -III sectional drawing.

  9 (c) and 9 (d) show an example in which an opening 35d is formed on the free end side of the facing surface 35a and the free end side is bent toward the facing surface 35b to form a convex portion 36. is there. 9E and 9F, an opening 45d is formed on the side surface of the facing surface 45a, and the convex portion 46 is formed by bending the free end portion toward the facing surface 45b. In either case, the vicinity of the openings 35d and 45d can be efficiently heated.

Also in these modified examples, as in the above-described embodiment, the heat generation positions are dispersed, so that fusing at the connecting portions 35c and 45c can be prevented, and the opening portions 35d and 45d can prevent the opposing surfaces 35a and 45a. In the portion where the width becomes narrow, the facing surfaces 35a and 45a can be easily press-fitted into the insulating film 12a of the winding 12. Both the convex portions 36 and 46 are adjusted in width and thickness so that they can be deformed by pressing with the welding electrodes P1 and P2.
The shapes of the openings 25d, 35d, and 45d are not limited to a rectangular shape or a semicircular shape, and can be any shape.

The connection process used in the armature manufacturing method shown in the first embodiment described above is not limited to the connection process in which the commutator 20 and the winding 12 in the brushed motor M are joined, and the insulating film 12a. Can be widely used for connection between a winding 12 having a surface and a terminal portion having a facing surface and a convex portion formed on the facing surface.
For example, an example in which the present invention is applied to a connection terminal portion of a brushless motor will be described below as a second embodiment.

(Second Embodiment)
10 to 12 relate to the second embodiment of the present invention, FIG. 10 and FIG. 11 are sectional views of the motor, and FIG. 12 is an explanation showing a method of joining the power supply terminal and each V-phase coil end. FIG.
In the following embodiments, members, arrangements, and the like are assigned the same reference numerals as in the first embodiment, and detailed descriptions thereof are omitted.

  As shown in FIGS. 10 and 11, the motor M2 (brushless motor) according to the present embodiment is provided on the side of the yoke housing 15 as a member for holding a power supply terminal for supplying drive current from an excitation circuit (not shown). And a power supply terminal 52a, 52b, and 52c as power supply terminals respectively corresponding to three-phase drive currents. The holder portion 51 includes three cutout portions 51e, 51e, 51e formed so as to extend in the radial direction. Power supply terminals 52a, 52b, 52c is held.

The ends of the coils derived from the V-phase coil, U-phase coil, and W-phase coil (winding 62) are connected to the power supply terminals 52a, 52b, and 52c, respectively.
Specifically, the first V-phase coil end 53a derived from the V-phase coil extends along the annular shape of the stator 60 to the second V-phase coil end 53b derived from the V-phase coil, and each V-phase coil end 53a, 53b is electrically connected to the power supply terminal 52a by fusing to which the present invention is applied.

Similarly, the first U-phase coil end 54a and the second U-phase coil end 54b derived from the U-phase coil are electrically connected to the power supply terminal 52b by fusing to which the present invention is applied.
Similarly, the first W-phase coil end 55a and the second W-phase coil end 55b derived from the W-phase coil are electrically connected to the power supply terminal 52c by fusing to which the present invention is applied.
In this way, by electrically connecting the coil ends 53a to 55b of the respective phases, the driving currents of the corresponding phases are supplied via the power supply terminals 52a, 52b, and 52c.

Next, a connection method will be described.
FIG. 12 shows a method of joining the power supply terminal 52a and the V-phase coil ends 53a and 53b.
12A is a schematic cross-sectional view in the rotational direction of the rotor, and FIG. 12B is a schematic cross-sectional view in the radial direction of the rotor.
As shown in FIG. 12, the power feeding terminal 52a is sandwiched between the welding electrodes P1 and P2 of the resistance welding apparatus, and the power feeding terminals are sandwiched by pressing the welding electrodes P1 and P2 in the directions of arrows B1 and B2, respectively. Pressurize 52a.

  From the state shown in FIG. 12, by pressing the welding electrodes P1 and P2 in the directions of arrows B1 and B2, the V-phase coil ends 53a and 53b temporarily fixed to the power supply terminal 52a are connected to the power supply terminal 52a. While being pressed against the opposing surfaces 56 a and 56 b, the convex portion 57 is pressed against the opposing surface 56 b and the energization is also possible from the convex portion 57. When the applied pressure reaches a predetermined value, the connecting portion 56c is deformed and the opposing surface 56a moves toward the opposing surface 56b. Therefore, the V-phase coil ends 53a and 53b sandwiched between the opposing surfaces 56a and 56b are crushed. The opposing surface 56a is press-fitted into the insulating film of each V-phase coil end 53a, 53b. At this time, the contact area between the facing surface 56a and each of the V-phase coil ends 53a and 53b is reduced by the opening 56d, and is easily pressed into the insulating film.

In this state, when electricity is supplied to the welding electrodes P1 and P2, the power supply terminal 52a generates heat due to overcurrent. The insulating coatings on the V-phase coil ends 53a and 53b are easily deteriorated due to heat input from the power supply terminal 52a that has generated heat and disappear. As a result, the power supply terminal 52a and the core wire at the center of each of the V-phase coil ends 53a and 53b come into contact and become conductive. Even at this stage, the V-phase coil ends 53a and 53b are fixed in a state of being held between the opposing surfaces 56a and 56b because they are continuously pressed by the welding electrodes P1 and P2.
When energization is further continued, the power supply terminal 52a and the core wires of the V-phase coil ends 53a and 53b are welded. In this way, the power feeding terminal 52a and the core wires of the V-phase coil ends 53a and 53b are joined, and joining by fusing is completed.

  Note that the connection between the power supply terminal 52b and each of the U-phase coil ends 54a and 54b and the connection between the power supply terminal 52c and each of the W-phase coil ends 55a and 55b are described above. Since the connection process with the phase coil ends 53a and 53b is the same, the description thereof is omitted.

  As described above, when the winding is joined to the power supply terminal for supplying power to the excitation circuit of the brushless motor, the power supply terminal connected to the excitation circuit has a surface facing the same as the terminal piece 25. The shape is such that convex portions are formed on the opposing surfaces. Thereby, a coil | winding and the terminal part of a brushless motor can be joined by the connection process used with the manufacturing method of the above-mentioned armature.

It is sectional drawing of the motor which concerns on the 1st Embodiment of this invention. 1 is a perspective view of an armature according to a first embodiment of the present invention. It is a section perspective view of the commutator concerning a 1st embodiment of the present invention. It is the perspective view and sectional drawing of the terminal part which concern on the 1st Embodiment of this invention. It is the perspective view and sectional drawing of the terminal part which concern on the 1st Embodiment of this invention. It is explanatory drawing which shows the joining method of the terminal part and winding which concern on the 1st Embodiment of this invention. It is explanatory drawing which shows the joining method of the terminal part and winding which concern on the 1st Embodiment of this invention. It is explanatory drawing which shows the joining method of the terminal part and winding which concern on the 1st Embodiment of this invention. It is explanatory drawing of the terminal part which concerns on the modification of the terminal part which concerns on the 1st Embodiment of this invention. It is sectional drawing of the motor which concerns on the 2nd Embodiment of this invention. It is sectional drawing of the motor which concerns on the 2nd Embodiment of this invention. It is explanatory drawing which shows the joining method of the terminal for electric power feeding which concerns on the 2nd Embodiment of this invention, and each V-phase coil end.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Armature, 11 Shaft, 12 Winding, 12a Insulation film, 12b Core wire, 13 Armature core, 13a Insulator, 14 Magnet, 15 York housing, 15a Bearing mounting part, 16A, 16B Bearing, 17 Brush device, 18 End plate 20 commutators, 21 through holes, 22 fixing portions, 23 commutation segments, 24 commutator grooves, 25 terminal pieces, 25a, 25b, 56a, 56b facing surfaces, 25c, 56c connecting portions, 25d, 56d openings, 26 , 57 Convex part, 35a, 45a, 35b, 45b Opposing surface, 35c, 45c Connecting part, 35d, 45d Opening part, 36, 46, 57 Convex part, A region, B1, B2 arrow, M, M2 motor, P1, P2 welding electrode, 51 holder member, 51e notch, 52a, 52b, 52c Null, 53a, 53b V-phase coil end, 54a, 54b U-phase coil end, 55a, 55b W-phase coil end, 59 rotor, 60 a stator 62 winding

Claims (9)

A fixed portion fixed to the shaft of the rotating electrical machine, and a plurality of rectifying segments arranged circumferentially on the outer peripheral surface of the fixed portion and electrically insulated from each other, and the rectifying segment has a winding A commutator provided with a terminal portion for joining,
The terminal portion has opposing surfaces spaced apart by a predetermined dimension, and at least one of the opposing surfaces is formed with a convex portion extending toward the other opposing surface,
The commutator is characterized in that, by applying a predetermined pressing force to the facing surface, the convex portion is deformable while being pressed against the other facing surface. The terminal portion includes a thin plate-like terminal piece that is formed to extend from an end portion of the rectifying segment on the armature core side and is bent in a substantially U shape.
The opposing surface is formed by a plate surface on the free end side of the terminal piece and a plate surface on the base end side of the terminal piece or an outer peripheral surface of the rectifying segment,
The commutator according to claim 1, wherein the convex portion is formed by cutting and raising a part of the plate surface of any one of the terminal pieces.   The commutator according to claim 1, wherein an opening is formed in a part of the facing surface.   The said terminal part is comprised so that arrangement | positioning of the said coil | winding can be arrange | positioned in the position between the said convex part and the connection part which connects the said opposing surface. The commutator described in   An armature comprising the commutator according to any one of claims 1 to 4. An armature core wound with a winding, a shaft to which the armature core is fixed, and a commutator having a plurality of rectifying segments electrically insulated from each other and fixed to the shaft. An armature manufacturing method comprising:
A projecting portion forming step for forming a projecting portion extending from one of the facing surfaces to the other while forming a facing surface separated by a predetermined dimension at a terminal portion where the winding of the rectifying segment is locked,
The winding temporarily fixed to the terminal portion is pressed between the opposing surfaces with a predetermined pressure, and the terminal portion is energized to generate heat so that the insulation film on the winding disappears and the winding is turned on. A wire connecting step of exposing a core wire of the wire and electrically connecting the core wire and the terminal portion;
In the connecting step, the convex portion deforming step of deforming the convex portion while bringing the convex portion into pressure contact with the other facing surface with a predetermined pressure and energizing between the convex portion and the other facing surface. And a method of manufacturing an armature.   7. The armature according to claim 6, wherein in the connecting step, a part of the terminal portion is press-fitted into an insulating film of the winding by pressing the winding between the facing surfaces. Manufacturing method. A motor comprising a winding having an insulating film and a terminal portion connected to the winding, wherein the terminal portion has a facing surface separated by a predetermined dimension, and at least one of the facing surfaces has the other surface Protrusions extending on the facing surface are formed,
By applying a predetermined pressing force to the facing surface, the convex portion is formed so as to be deformable while being pressed against the other facing surface. A method of manufacturing a motor comprising a winding having an insulating film and a terminal portion connected to the winding, wherein a facing surface spaced apart by a predetermined dimension is formed on a terminal portion to which the winding is locked. A protrusion forming step of forming a protrusion extending from one of the opposing surfaces toward the other;
The winding temporarily fixed to the terminal portion is pressed between the opposing surfaces with a predetermined pressure, and the terminal portion is energized to generate heat so that the insulation film on the winding disappears and the winding is turned on. A wire connecting step of exposing a core wire of the wire and electrically connecting the core wire and the terminal portion;
In the connecting step, the convex portion deforming step of deforming the convex portion while bringing the convex portion into pressure contact with the other facing surface with a predetermined pressure and energizing between the convex portion and the other facing surface. And a method of manufacturing a motor.

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