JP2005137193A - Short-circuit member, commutator, and method for manufacturing short-circuit member - Google Patents

Abstract

Provided is a commutator short-circuit member that suppresses an increase in axial length and does not increase the types of components.
A short-circuit member Sb includes a plurality of outer peripheral terminals 33a and 33b arranged in the circumferential direction, a plurality of inner peripheral terminals 34a and 34b arranged in the circumferential direction inside the outer terminals 33a and 33b, Short-circuit component member groups 31a and 31b, in which a plurality of connecting portions 35a and 35b that connect the side terminals 33a and 33b and the inner peripheral terminals 34a and 34b with a predetermined angle shift in the circumferential direction, are formed in the same plane. It is laminated. The short-circuit component members 31a and 31b are stacked with the connecting portions 35a and 35b reversed, and the outer peripheral terminals 33a and 33b and the inner peripheral terminals 34a and 34b are in contact with each other in the stacking direction. The portions 35a and 35b are not brought into contact with each other in the stacking direction by the insulating material 32. The short-circuit member Sb is fixed to the commutator body so that the outer peripheral side terminals 33a and 33b are connected to the segment part of the commutator body.
[Selection] Figure 4

Description

  The present invention relates to a short-circuit member for short-circuiting predetermined segment portions, a commutator in which predetermined segment portions are short-circuited, and a method for manufacturing a short-circuit member.

  2. Description of the Related Art Conventionally, as a motor including a power feeding brush, there is one in which predetermined segments of a plurality of segments (portions) arranged on a commutator are short-circuited. In such a motor, a predetermined segment is short-circuited, whereby a current can be passed to a segment that is not in contact with the power supply brush, and the number of power supply brushes can be reduced.

  And as a structure which short-circuits predetermined segments as mentioned above, there exists a thing made into the state short-circuited by using the short circuit wire or routing the coil | winding wound around a core (by detouring).

  As another structure, a pressure equalizing device (short circuit member) formed by alternately laminating a plurality of terminals and insulating plates for short-circuiting predetermined segments in the axial direction, a commutator having a segment portion (main body) ) In the axial direction (for example, see Patent Document 1).

Further, as another structure, there is a structure in which a plurality of types of terminals for short-circuiting predetermined segments are combined (arranged at different positions in the axial direction) and embedded in the insulator of the commutator (for example, Patent Document 2).
JP 2000-60073 A JP 2003-189547 A

  However, in the case of short-circuiting with a wiring such as a short-circuit line as described above, a wiring arrangement space is required between the commutator (segment) and the armature core, and the commutator including the arrangement space (and thus the armature) It becomes long in the axial direction. In addition, even in the case of short-circuiting with a pressure equalizing device (short-circuit member) in which a large number of terminals and insulating plates are alternately laminated in the axial direction, the axially long pressure equalizing device is assembled to the commutator (main body) in the axial direction. For this reason, the commutator (and consequently the armature) including the pressure equalizing device is elongated in the axial direction. This causes the motor to become large.

  On the other hand, in the case where multiple types of terminals for short-circuiting predetermined segments are combined and embedded in the commutator insulation, the terminals are accommodated inside the commutator (insulation), so the axial length Is suppressed from becoming longer. However, this structure requires a plurality of types of terminals in order to arrange the terminals at different positions in the axial direction. This causes a manufacturing cost to increase because a die corresponding to each type is required, and different types of parts are handled, resulting in complicated assembly work.

  The present invention has been made in order to solve the above-described problems, and its purpose is to prevent a short circuit member, a commutator, and a short circuit member from suppressing an increase in axial length and from increasing the number of component types. It is to provide a manufacturing method.

  In the invention according to claim 1, a plurality of outer peripheral terminals arranged in the circumferential direction, a plurality of inner peripheral terminals arranged in the circumferential direction inside the outer peripheral terminal, the outer peripheral terminals, and the inner peripheral side A plurality of short-circuit component members formed by coplanarly connecting a plurality of connecting portions that are respectively shifted from the terminal by a predetermined angle in the circumferential direction are stacked with the connecting portions reversed, and the outer peripheral terminal The gist is a short-circuit member in which the terminals and the inner peripheral side terminals are in contact with each other in the stacking direction, and the connecting portions are not in contact with each other in the stacking direction.

  According to a second aspect of the present invention, in the short-circuit member according to the first aspect, the connecting portion is formed thinner than the outer peripheral side terminal and the inner peripheral side terminal, and between the connecting portions arranged in the stacking direction. Insulating material is interposed.

  In invention of Claim 3, in the short circuit member of Claim 1, the said connection parts are bent or curved with respect to the said outer peripheral side terminal and the said inner peripheral side terminal so that it may mutually space apart. Contactless.

According to a fourth aspect of the present invention, in the short-circuit member according to the second aspect, a positioning portion for positioning in the circumferential direction is formed in the insulating material.
In invention of Claim 5, in the short circuit member of any one of Claims 1 thru | or 4, it fits in at least one of the said outer peripheral side terminal and the said inner peripheral side terminal in the said short circuit component member group. Concave portions and fitting convex portions are alternately formed in the circumferential direction.

According to a sixth aspect of the present invention, in the short-circuit member according to any one of the first to fifth aspects, the connecting portion is formed along an involute curve.
According to a seventh aspect of the present invention, the short-circuit member according to any one of the first to sixth aspects and a plurality of segment portions provided in the circumferential direction and respectively connected to the outer peripheral side terminal or the inner peripheral side terminal. The gist is a commutator provided with a commutator main body.

  In invention of Claim 8, It is a commutator provided with the commutator main body which has the segment part provided with two or more by the circumferential direction, Comprising: On the outer peripheral side terminal arrange | positioned plurally by the circumferential direction, and the inner side of the said outer peripheral side terminal A short circuit formed by forming a plurality of inner peripheral terminals arranged in the circumferential direction and a plurality of connecting portions that connect the outer peripheral terminal and the inner peripheral terminal with a predetermined angle shift in the circumferential direction. A plurality of component members are stacked with the connecting portions being reversed, the outer peripheral terminals are connected to the segment parts, and the inner peripheral terminals are stacked to be in contact with each other, A short-circuit member in which the connecting portions are not in contact with each other is provided.

  According to a ninth aspect of the present invention, in the commutator according to the seventh or eighth aspect, the commutator body includes a plurality of the segment portions having a substantially cylindrical shape, and a brush is in contact with the outer side in the radial direction. The short-circuit member housing portion is provided inside the segment portion in the radial direction, and the short-circuit member is housed in the short-circuit member housing portion.

According to a tenth aspect of the present invention, in the commutator according to the ninth aspect, the short-circuit member is provided so as not to protrude outward in the axial direction from the axial end surface of the commutator body.
According to an eleventh aspect of the present invention, in the commutator according to the ninth or tenth aspect, the commutator body has a body insulation in which a shaft through-hole into which a rotating shaft is inserted is formed radially inward of the segment portion. The inner peripheral terminal is disposed radially outside the shaft through hole.

  According to a twelfth aspect of the present invention, in the commutator according to any one of the ninth to eleventh aspects, the short-circuit member is provided so as not to protrude radially outward from the outer peripheral surface of the commutator body.

  According to a thirteenth aspect of the present invention, in the commutator according to any one of the ninth to twelfth aspects, a recess opening in the axial direction is formed at an axial end of the segment portion, and the outer peripheral side The terminal is formed with an insertion protrusion that extends radially outward and can be inserted into the recess from the axial direction. The short-circuit member has an end in the axial direction of the commutator body that is inserted into the recess. Placed in the department.

  In the invention described in claim 14, in the commutator according to any one of claims 9 to 11, a recess opening in the axial direction is formed at an axial end of the segment part, and the outer peripheral side The terminal is formed with a locking portion for locking the winding extending outward in the radial direction and projecting outside through the recess, and the locking portion is a pair of arm portions constituting the recess. It is fixed by caulking.

According to a fifteenth aspect of the present invention, in the commutator according to any one of the ninth to fourteenth aspects, the outer peripheral side terminal is in contact with the inner periphery of the segment portion in the radial direction.
The invention according to claim 16 is the method of manufacturing a short-circuit member according to any one of claims 1 to 6, wherein at least each of the connecting portions is formed to be spaced apart in the circumferential direction, and the connections are made. Punching step of punching the conductive plate material so as to form a connecting portion at the time of forming a ring connecting at least one of the radially inner side and the radially outer side, and the conductive material punched after the punching step A short circuit provided with a lamination step of laminating a plurality of plate members with the connecting portions in the reverse direction, and a removing step of removing at least the forming connection portions of the plurality of conductive plate members laminated after the laminating step. The gist of the manufacturing method of the member.

  In the invention according to claim 17, in the method of manufacturing a short-circuit member according to claim 16, an insulating material that keeps the interval between the connecting portions is filled after the stacking step and before the removing step. An insulating material filling step provided by curing is provided.

  According to an eighteenth aspect of the present invention, in the method for manufacturing a short-circuit member according to the sixteenth or seventeenth aspect, the first and first short-circuit members are formed so that the connecting portions are formed in opposite directions when viewed from the same direction. Each of the two punching work sections is performed, and the two conductive plate materials punched by the first and second punching work sections are moved to the common stacking work section as they are, and the stacking process is performed.

(Function)
According to the first aspect of the present invention, for example, each of the 24 outer peripheral terminals (each inner peripheral terminal) is 120 with a configuration in which two short-circuit constituent member groups formed in the same plane are stacked. Can be electrically connected at intervals. Thus, for example, by connecting each outer peripheral terminal (or each inner peripheral terminal) to 24 segment portions provided in the circumferential direction of the commutator body, the segment portions at intervals of 120 degrees can be short-circuited, respectively. it can. That is, in the above configuration, the number of short-circuiting conductors arranged in the axial direction (stacking direction) can be reduced (compared to the prior art pressure equalizing device), and the axial length of the commutator (armature) can be reduced. It can suppress becoming longer. Moreover, since the short-circuit component group is formed in the same plane, it can be easily formed from a conductive plate. And since the same short circuit component group is used, the increase in a component kind is suppressed. Furthermore, since the outer peripheral side terminals and the inner peripheral side terminals are in contact with each other in the laminating direction, electrical connection can be made in a simple shape while eliminating the need for separate members (pins, etc.) for connection. Reliability can be obtained.

  According to the invention of claim 2, the connecting portion is formed thinner than the outer peripheral side terminal and the inner peripheral side terminal, and an insulating material is interposed between the connecting portions arranged in the stacking direction. The short circuit between the connecting portions is reliably prevented. Moreover, the space | interval of the member which consists of a connection part and the outer peripheral side terminal connected by a connection part and an inner peripheral side terminal is maintained with an insulating material.

  According to invention of Claim 3, it is made non-contact by bending (bending) or curving in the direction of an axis to an outer peripheral side terminal and an inner peripheral side terminal so that connecting parts may mutually be separated, The short circuit is prevented. In addition, since the structure is made non-contact by being bent or curved in the axial direction, for example, the outer peripheral side terminal, the inner peripheral side terminal and the connecting portion may all have the same thickness (need to be processed to different thicknesses). A short-circuit component group can be easily obtained from a plate material having a constant thickness.

  According to the fourth aspect of the invention, since the positioning member for positioning in the circumferential direction is formed in the insulating material, it can be easily positioned and assembled with the commutator body side where the segment part is provided.

  According to the fifth aspect of the present invention, at least one of the outer peripheral side terminal and the inner peripheral side terminal in the short-circuit component member group is formed with fitting concave portions and fitting convex portions alternately in the circumferential direction. Therefore, when the short-circuit component group is laminated so that the connecting portions are in the opposite direction, the fitting concave portions and the fitting convex portions coincide with each other in the stacking direction, and they can be easily fitted and fixed.

  According to the sixth aspect of the present invention, since the connecting portion is formed along the involute curve, useless space on the plane (non-space other than space necessary for ensuring insulation between the connecting portions). (Required space) can be reduced, so that the area of each part (inner side and outer side in the radial direction) in the connecting part can be increased as viewed from the axial direction. As a result, the axial thickness can be minimized while ensuring the insulation between the connecting portions.

According to the seventh aspect of the invention, it is possible to obtain a commutator in which predetermined segment portions are short-circuited, the axial length is short, and the number of component types is small.
According to the eighth aspect of the present invention, for example, 24 segment parts (outer peripheral side terminals) are electrically connected at intervals of 120 degrees in a configuration in which two short-circuit constituent member groups formed in the same plane are stacked. Can be connected and short-circuited. That is, in the above configuration, the number of short-circuiting conductors arranged in the axial direction (stacking direction) can be reduced (compared to the prior art pressure equalizing device), and the axial length of the commutator (armature) can be reduced. It can suppress becoming longer. Moreover, since the short-circuit component group is formed in the same plane, it can be easily formed from a conductive plate. And since the same short circuit component group is used, the increase in a component kind is suppressed. Furthermore, since the inner peripheral terminals are brought into contact with each other by being laminated, the reliability of electrical connection is obtained with a simple shape while eliminating the need for separate members (such as pins) for connection. be able to.

  According to the ninth aspect of the present invention, the commutator body has a plurality of segment portions that are substantially cylindrical, and the brush is in contact with the outer side in the radial direction. Since it is accommodated in the short-circuit member accommodating portion on the inner side in the direction, for example, the brush wear powder is suppressed from adhering to the short-circuit member. Therefore, for example, a short circuit between connecting portions adjacent to each other in the circumferential direction in the short circuit member is prevented.

  According to the tenth aspect of the present invention, the brush wear powder adheres to the short-circuit member, for example, because it is housed in the short-circuit member housing portion so as not to protrude outward in the axial direction from the axial end surface of the commutator body. This is further suppressed. Therefore, for example, the short circuit of the connection parts adjacent to each other in the circumferential direction in the short circuit member is further prevented. Moreover, the short-circuit member does not lengthen the axial length of the commutator.

  According to the eleventh aspect of the invention, since the inner peripheral terminal is disposed radially outside the shaft through hole into which the rotating shaft is inserted, the rotating shaft can be made of a conductive material such as metal. Short circuit is prevented (insulation is ensured).

  According to invention of Claim 12, since a short circuit member is provided so that it may not protrude radially outward from the outer peripheral surface of a commutator main body, it is suppressed that brush abrasion powder adheres to a short circuit member further, for example. . Further, the short-circuit member does not increase the outermost diameter of the commutator.

  According to the invention of claim 13, the short-circuit member is moved in the axial direction with respect to the commutator body, and the insertion convex portion is inserted into the concave portion, so that the axial end portion of the commutator body is circumferentially provided. It can be easily arranged so that it cannot move. Further, by causing the insertion convex portion to abut against the bottom portion of the concave portion, the short-circuit member can be easily positioned in the axial direction, and shakiness in the axial direction can be prevented.

  According to the fourteenth aspect of the present invention, it is possible to easily fix the locking portion, and thus the short-circuit member, to the commutator body, and to reliably connect the segment portion and the outer peripheral side terminal via the locking portion. Can be connected to. In addition, since the short-circuit member is disposed in the axial direction so as to overlap with the space of the locking portion necessary for the commutator, the short-circuit member does not increase the axial length of the commutator.

  According to the fifteenth aspect of the present invention, since the outer peripheral side terminal is brought into contact with the inner periphery of the segment portion in the radial direction, the short-circuit member is displaced in the radial direction due to centrifugal force during rotation. Is prevented.

  According to the sixteenth aspect of the present invention, the electrically conductive plate material punched in the punching step is formed with a molding-time connecting portion that connects the connecting portion in an annular shape at least one of the radially inner side and the radially outer side. Therefore, handling of the material (conductive plate material) at the time of the lamination process becomes easy. Therefore, a short circuit member can be manufactured easily.

  According to the invention of claim 17, since the insulating material that keeps the interval between the connecting portions in the insulating material filling step is filled and hardened before the removing step, the connecting step is performed after the removing step. The interval between the members composed of the part and the outer peripheral side terminal and the inner peripheral side terminal connected by the connecting part is maintained by the insulating material.

  According to the eighteenth aspect of the present invention, the punching step is performed in the first and second punching working portions so that the connecting portions are formed in opposite directions when viewed from the same direction. And the two electroconductive board | plate materials pierced by the 1st and 2nd punching | working operation | work parts are moved to a common lamination | stacking operation | work part as it is, and the said lamination | stacking process is performed. Therefore, each working part can always be moved. Moreover, it is not necessary to invert the punched conductive plate material so that the connecting portion is in the opposite direction. From these things, high-speed manufacture of a short circuit member is attained efficiently.

According to invention of Claims 1-6, it can suppress that an axial direction length becomes long and can provide the short circuit member which does not increase a component kind.
According to the invention described in claims 6 to 15, it is possible to provide a commutator that suppresses an increase in the axial length and short-circuits predetermined segment portions that do not increase in component type.

  According to invention of Claims 16-18, it can provide the manufacturing method of the short circuit member which suppresses that an axial direction length becomes long and does not increase a component kind.

Hereinafter, an embodiment in which the present invention is embodied in a motor having a commutator having 24 segments will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the motor 101 of this embodiment includes a stator 102 and an armature (rotor) 103. The stator 102 includes a substantially bottomed cylindrical yoke housing 104 and a plurality (six in this embodiment) of permanent magnets 105 disposed and fixed at equal angular intervals on the inner peripheral surface of the yoke housing 104. Yes. An end frame 106 is fixed to the yoke housing 104 so as to close the opening, and an anode-side power supply brush B1 and a cathode-side power supply brush B2 connected to an external power source or the like are held on the end frame 106. ing.

  The armature 103 includes a metal rotating shaft 107, an armature core K fixed to the rotating shaft 107, and a commutator S that is also fixed to the rotating shaft 107. A bearing 108a held at the center of the bottom of the yoke housing 104 and a bearing 108b held at the center of the end frame 106 are rotatably held. In this state, the armature core K is disposed so as to face the permanent magnet 105 and be surrounded.

  The armature core K has eight teeth T1 to T8 extending radially about the rotation shaft 107, and slots S1 to S8 are formed between the teeth T1 to T8, respectively. Then, windings M1 to M8 are wound around the teeth T1 to T8 so as to pass through the slots S1 to S8, respectively, and both ends of the windings M1 to M8 are connected to the commutator S. FIG. 12 is a schematic diagram in which the armature 103 is developed in a planar shape.

  As shown in FIG. 3, the commutator S includes a commutator body Sa and a short-circuit member Sb. The commutator main body Sa includes a substantially cylindrical main body insulating material H and a plurality of segments (24 in the present embodiment) disposed on the outer peripheral surface of the main body insulating material H in the circumferential direction (see FIG. 12). 3, only two are shown). The segment portions 1 to 24 have a substantially cylindrical shape on the outer periphery of the main body insulating material H, and the anode side and cathode side power supply brushes B1 and B2 are in contact (press contact) from the outside in the radial direction. Become. In the axial ends of the segment portions 1 to 24 of the present embodiment, concave portions 25 (see FIGS. 9 to 11) that are open in the axial direction are formed. Further, a short-circuit member accommodating recess 26 as a short-circuit member accommodating portion is formed at the axial end of the main body insulating material H to the same depth as the recess 25. The short-circuit member accommodating recess 26 is formed in the body insulating material H in an annular shape and is formed from the outer periphery of the main body insulating material H to the vicinity of the inner periphery of the main body insulating material H. A positioning concave portion 27 for positioning is formed at a predetermined position in the circumferential direction of the short-circuit member accommodating concave portion 26. Further, the inner periphery of the main body insulating material H constitutes a shaft through hole 28 into which the rotating shaft 107 is inserted. Further, the short-circuit member accommodating recess 26 is formed in the main body insulating material H up to the vicinity of the inner periphery (shaft through hole 28) of the main body insulating material H, so that the inner periphery of the short-circuit member accommodating recess 26 and the main body insulating material H An annular portion 29 is formed between the inner periphery and the inner periphery.

  As shown in FIGS. 4A and 4B, the short-circuit member Sb includes two identical short-circuit constituent member groups 31a and 31b and an insulating material 32. Each short circuit component group 31a, 31b includes a plurality of outer peripheral terminals 33a, 33b arranged in the circumferential direction, a plurality of inner peripheral terminals 34a, 34b arranged in the circumferential direction inside the outer terminals 33a, 33b, A plurality of connecting portions 35a and 35b for connecting the outer peripheral side terminals 33a and 33b and the inner peripheral side terminals 34a and 34b with a predetermined angle shift in the circumferential direction are formed in the same plane.

  In the present embodiment, the outer peripheral terminals 33a and 33b extend radially outward (from the center of the outer peripheral terminals 33a and 33b in the radial direction (outer periphery)) to lock the windings M1 to M8. The locking portions 36a and 36b are formed. The locking portions 36a and 36b constitute insertion convex portions that can be inserted into the concave portion 25 from the axial direction. In the present embodiment, the outer peripheral terminals 33a and 33b, the inner peripheral terminals 34a and 34b, the connecting parts 35a and 35b, and the locking parts 36a and 36b are formed in each of the short circuit component groups 31a and 31b. Has been. In addition, the predetermined angle in the present embodiment is 60 degrees, and the connecting portions 35a and 35b shift the outer peripheral terminals 33a and 33b and the inner peripheral terminals 34a and 34b by 60 degrees in the circumferential direction (this In the embodiment, the terminals are connected by shifting four terminals. In addition, the same plane shape is a layered shape even if there are some irregularities (steps) (each part is not in the axial direction), and the connecting portions 35a and 35b of the present embodiment are on the outer peripheral side. It is formed thinner than the terminals 33a and 33b, the inner peripheral terminals 34a and 34b, and the locking portions 36a and 36b, and one surface is formed with a step D (see FIG. 5) from one surface of the other portion. ing. Further, the outer peripheral side terminals 33a, 33b and the inner peripheral side terminals 34a, 34b are alternately provided with fitting concave portions (holes) 37a, 37b, 38a, 38b and fitting convex portions 39a, 39b, 40a, 40b in the circumferential direction. (See FIG. 5). The fitting concave portions 37a, 37b, 38a, 38b and the fitting convex portions 39a, 39b, 40a, 40b are the respective circumferential centers of the outer peripheral side terminals 33a, 33b and the inner peripheral side terminals 34a, 34b. It is formed at a substantially radial center. The connecting portions 35a and 35b are formed along an involute curve.

  The short circuit component groups 31a and 31b are laminated in the axial direction with the connecting portions 35a and 35b reversed (the direction shifted from the same direction is reversed), and are laminated in the outer peripheral side terminal 33a. 33b and the inner peripheral terminals 34a, 34b are in surface contact with each other in the stacking direction, and the connecting portions 35a, 35b are not in contact with each other in the stacking direction (due to the step D). In addition, the short circuit component group 31a, 31b has the fitting convex portions 39a, 39b, 40a, 40b fitted into the fitting concave portions 37a, 37b, 38a, 38b, so that the outer peripheral side terminals 33a, 33b and the inner terminals The peripheral terminals 34a and 34b are fixed to each other.

  The insulating material 32 is made of an insulating resin material and is interposed between the connecting portions 35a and 35b arranged in the stacking direction. Specifically, the insulating material 32 is formed so as to fill the gaps between the outer peripheral side terminals 33a and 33b, the inner peripheral side terminals 34a and 34b, and the connecting portions 35a and 35b configured as described above. The insulating material 32 is formed with positioning convex portions 32 a as positioning portions for positioning in the circumferential direction at positions corresponding to the positioning concave portions 27.

  And short circuit member Sb is being fixed to commutator body Sa so that the peripheral side terminals 33a and 33b may be connected to the segment parts 1-24, respectively. Specifically, in the short-circuit member Sb, the positioning convex portion 32a is fitted into the positioning concave portion 27, the portions excluding the locking portions 36a and 36b are accommodated in the short-circuit member accommodating concave portion 26, and the locking portions 36a and 36b are It is arranged so as to be inserted into the recess 25 and to protrude outside (from the outer periphery of the commutator body Sa) through the recess 25. 10 and 11, the locking portions 36a and 36b are caulked and fixed by the pair of arm portions 25a constituting the concave portion 25, so that the short-circuit member Sb is fixed to the commutator body Sa. It is fixed. 10 and 11 are schematic views of a part of the end of the commutator S in the axial direction viewed from the outside in the radial direction, and also show a jig J for caulking. Moreover, the outer peripheral side terminals 33a and 33b in the short-circuit member Sb of the present embodiment are in a fixed state, and the outer periphery excluding the locking portions 36a and 36b is brought into contact with the inner periphery of the segment portions 1 to 24 in the radial direction. Is set to Further, the short-circuit member Sb is provided so as not to protrude outward in the axial direction from the axial end surface of the commutator body Sa. Further, the inner peripheral side terminals 34 a and 34 b of the short-circuit member Sb are disposed on the radially outer side than the shaft through hole 28. Further, an annular portion 29 of the main body insulating material H is disposed between the inner peripheral side terminals 34 a and 34 b and the shaft through hole 28.

Next, the manufacturing method of the short circuit member Sb configured as described above will be described in detail.
First, in the punching process, as shown in FIG. 5, the connecting portions 35 a and 35 b in one short-circuit component group 31 a (31 b) are formed apart from each other in the circumferential direction, and the connecting portions 35 a and 35 b are arranged in the radial direction. The conductive plate 53 is punched out so that the inner connecting portion 51 and the outer connecting portion 52 are formed as connecting portions at the time of molding that are connected in an annular shape inside and outside. In the present embodiment, at this time, the conductive plate 53 is punched out so that the outer peripheral terminals 33a and 33b and the inner peripheral terminals 34a and 34b are also separated in the circumferential direction. In the present embodiment, the fitting recesses 37a, 37b, 38a, 38b and the fitting projections 39a, 39b, 40a, 40b are simultaneously formed at this time. In the present embodiment, the step D is simultaneously formed at this time. In the present embodiment, as shown in FIG. 7, the first and second punching working portions 54 and 55 perform the punching process so that the connecting portions 35a and 35b are formed in opposite directions when viewed from the same direction. Do each. FIG. 7 is a schematic view of the manufacturing apparatus (including the first and second punching operation portions 54 and 55) and the continuous conductive plate 53 as viewed from above, and the punched shape is not shown. .

  Next, in the laminating step, as shown in FIG. 6, the two punched conductive plate materials 53 are laminated with the connecting portions 35a and 35b in opposite directions. In this embodiment, at this time, the fitting concave portions 37a, 37b, 38a, 38b are fitted with fitting convex portions 39a, 39b, 40a, 40b (specifically, 37a is 39b, 37b is 39a, 38a 40b and 40b are fitted into 38b). Further, in the present embodiment, as shown in FIG. 7, the two conductive plate materials 53 punched by the first and second punching work portions 54 and 55 are used as they are in a common laminating work portion 56. The stacking process is carried out by moving.

  Next, in the insulating material filling step, as shown in FIG. 8, the insulating material 32 is filled and cured. Specifically, the laminated two conductive plate materials 53 are accommodated in a mold (not shown), and the molten insulating resin material is filled and cured so that the gaps formed in the two conductive plate materials 53 are filled. Then, the insulating material 32 is formed. In the present embodiment, the positioning convex portion 32a is simultaneously formed at this time.

  Next, in the removing step, as shown by a one-dot chain line in FIG. 8, the inner connecting portion 51 and the outer connecting portion 52 of the two conductive plate members 53 stacked are removed (punched). Thereby, manufacture of short circuiting member Sb (refer to Drawing 4) is completed.

  In the short-circuit member Sb configured as described above, the 24 outer peripheral terminals 33a and 33b (the inner peripheral terminals 34a and 34b) are electrically connected at intervals of 120 degrees. Therefore, in the commutator S, a predetermined segment portion (for example, a set of the segment portions 1, 9, 17 and a set of the segment portions 5, 13, 21, etc.) is provided by the short-circuit member Sb (specifically, the locking portion 36a). The outer terminal 33a, the connecting part 35a, the inner terminals 34a and 34b, the connecting part 35b, the outer terminal 33b, and the locking part 36b) are short-circuited. Therefore, for example, as shown in FIG. 12, not only the segment portions 6, 7, 18, and 19 in which the anode-side and cathode-side power supply brushes B1 and B2 are in direct contact, but also the segment short-circuited by the short-circuit member Sb. Current can also flow through the portions 2, 3, 10, 11, 14, 15, 22, and 23. Therefore, it is possible to supply current to a large number of windings M1 to M8 while reducing the number of anode-side and cathode-side power supply brushes B1 and B2.

Next, characteristic effects of the above embodiment will be described below.
(1) Twenty-four outer peripheral terminals 33a and 33b (inner peripheral terminals 34a and 34b) are 120 degrees with a configuration in which two short-circuit component groups 31a and 31b formed in the same plane are stacked. Can be electrically connected to the interval. That is, in the above configuration, the number of short-circuiting conductors (coupling portions 35a, 35b, etc.) arranged in the axial direction (stacking direction) can be reduced (compared to the prior art pressure equalizing device), and thus the commutator S An increase in the axial length of the (armature) can be suppressed. Moreover, since the short circuit component groups 31a and 31b are formed in the same plane, they can be easily formed from the conductive plate 53. And since the same short circuit component group 31a, 31b is used, the increase in a component kind is suppressed. Furthermore, since the outer peripheral terminals 33a and 33b and the inner peripheral terminals 34a and 34b are in direct contact with each other (surface contact in the axial direction without using another member), separate members (in particular, for connecting each other) The reliability of the electrical connection can be obtained with a simple shape while eliminating the need for pins and the like. For these reasons, it is not necessary to use many types of molds, and it is not necessary to handle different types of parts, thereby suppressing an increase in manufacturing cost. In addition, since the short-circuit member Sb is provided by being assembled to the commutator body Sa having the segment portions 1 to 24 (it is not necessary to be formed simultaneously with the commutator body Sa), the commutator body Sa needs the short-circuit member Sb. Can be used with a commutator that does not (does not short-circuit).

  (2) The connecting portions 35a and 35b are formed thinner than the outer peripheral side terminals 33a and 33b and the inner peripheral side terminals 34a and 34b, and the insulating material 32 is interposed between the connecting portions 35a and 35b arranged in the stacking direction. In addition, the insulating material 32 reliably prevents a short circuit between the connecting portions 35a and 35b. Moreover, the space | interval of the member which consists of connection part 35a, 35b, outer peripheral side terminal 33a, 33b connected by connection part 35a, 35b, and inner peripheral side terminal 34a, 34b is maintained with an insulating material.

  (3) Since the positioning recess 27 is formed in the main body insulating material H and the positioning convex portion 32a is formed in the insulating material 32, the short-circuit member Sb can be easily positioned and assembled with the commutator main body Sa side. it can. In addition, since the positioning convex part 32a is formed in the said insulating material filling process, the process only for forming the positioning convex part 32a is not required.

  (4) Fitting recesses 37a, 37b, 38a, 38b and fitting protrusions 39a, 39b, 40a, 40b are alternately formed in the circumferential direction on the outer peripheral terminals 33a, 33b and the inner peripheral terminals 34a, 34b. Is done. In this way, when the short-circuit component members 31a and 31b are stacked so that the connecting portions 35a and 35b are in the opposite directions, the fitting recesses 37a, 37b, 38a, and 38b and the fitting protrusions 39a and 39b are stacked in the stacking direction. , 40a, 40b coincide with each other and can be easily fitted and fixed.

  (5) Since the connecting portions 35a and 35b are formed along an involute curve, it is necessary to ensure useless space on the plane (as viewed from the axial direction) (insulation between the connecting portions 35a and 35b). (Unnecessary space other than the space to become) can be reduced. Therefore, the area of each part (radial inner side and outer side) in the coupling parts 35a and 35b when viewed from the axial direction can be made wider than in the case where the linear coupling part is simply used. As a result, the axial thickness can be minimized while ensuring the insulation between the connecting portions 35a and 35b.

  (6) The short-circuit member Sb is accommodated in the short-circuit member accommodating recess 26 on the radially inner side of the segment portions 1 to 24 except for the locking portions 36a and 36b. Adhering to the stoppers 36a and 36b) is suppressed. In particular, in the present embodiment, since the short-circuit member Sb is provided so that (all) does not protrude outward in the axial direction from the axial end surface of the commutator body Sa, for example, the brush wear powder is caused by the short-circuit member Sb (the locking portions 36a, Adhering to (except 36b) is further suppressed. Therefore, for example, a short circuit between the connecting portions 35a and 35b adjacent in the circumferential direction in the short circuit member Sb is prevented.

  (7) Since the short-circuit member Sb (excluding the locking portions 36a and 36b) is accommodated in the short-circuit member accommodating recess 26 on the radially inner side of the segment portions 1 to 24 (the short-circuit member Sb is the axial direction of the commutator body Sa) The short-circuit member Sb does not lengthen the axial length of the commutator S because it is provided so as not to protrude outward in the axial direction from the end face.

  Further, in the present embodiment, each outer peripheral side terminal 33a, 33b has a locking portion 36a for locking the windings M1 to M8 that extend radially outward and project outward from the outer periphery of the commutator body Sa. , 36b are formed. Therefore, even with this configuration alone (even if the short-circuit member Sb is not housed in the short-circuit member housing recess 26), the short-circuit member Sb overlaps the space of the locking portion necessary for the commutator S in the axial direction. Therefore, the short-circuit member Sb does not lengthen the axial length of the commutator S.

  (8) Since the inner peripheral side terminals 34a and 34b of the short-circuit member Sb are arranged radially outside the shaft through hole 28, the rotating shaft 107 is made of a metal that is a conductive material as in the present embodiment. Also, short circuit is prevented (insulation is ensured). Further, since the annular portion 29 of the main body insulating material H is disposed between the inner peripheral side terminals 34 a and 34 b and the shaft through hole 28, a short circuit is reliably prevented at the annular portion 29. Further, since the inner peripheral side terminals 34a and 34b and the annular portion 29 can be engaged, the fixing of the short-circuit member Sb to the main body insulating material H can be strengthened.

  (9) A concave portion 25 opened in the axial direction is formed at the axial end of each of the segment portions 1 to 24. Each outer peripheral side terminal 33a, 33b extends radially outward and is inserted into the concave portion 25 from the axial direction. Possible locking portions 36a and 36b are formed, and the short-circuit member Sb is arranged at the axial end of the commutator body Sa with the locking portions 36a and 36b inserted into the recess 25. Therefore, the short-circuit member Sb is moved in the axial direction with respect to the commutator body Sa, and the engaging portions 36a and 36b are inserted into the recesses 25 to move to the axial end of the commutator body Sa in the circumferential direction. It can easily be arranged impossible. In addition, by bringing the locking portions 36a and 36b into contact with the bottom of the recess 25, the short-circuit member Sb can be easily positioned in the axial direction, and shakiness in the axial direction can be prevented.

  (10) A concave portion 25 opened in the axial direction is formed at the axial ends of the segment portions 1 to 24, and the locking portions 36 a and 36 b are caulked by a pair of arm portions 25 a constituting the concave portion 25. Fixed. Therefore, the locking portions 36a and 36b and thus the short-circuit member Sb can be easily fixed to the commutator body Sa, and the segment portions 1 to 24 and the outer peripheral side terminals 33a and 33b are connected via the locking portions 36a and 36b. Can be reliably connected electrically.

  (11) Since the outer peripheral terminals 33a and 33b are in a fixed state and the outer periphery excluding the locking portions 36a and 36b is in contact with the inner periphery of the segment portions 1 to 24 in the radial direction, the centrifugal force during rotation For example, the short circuit member Sb is prevented from being displaced in the radial direction.

  (12) The fitting concave portions 37a, 37b, 38a, 38b and the fitting convex portions 39a, 39b, 40a, 40b are the respective circumferential centers of the outer peripheral side terminals 33a, 33b and the inner peripheral side terminals 34a, 34b. Since it is formed at the substantially radial center, the fitting force can be increased while maintaining the rigidity of each part (the outer peripheral terminals 33a and 33b and the inner peripheral terminals 34a and 34b).

  (13) In the manufacturing method described above, the inner connection portion 51 and the outer connection as a connection portion during molding that connect the connection portions 35a and 35b to the conductive plate 53 punched in the punching process in an annular manner on the radially inner side and the outer side. Since the portion 52 is formed (not separated for each of the connecting portions 35a and 35b), handling of the material (conductive plate material 53) during the stacking process (and the insulating material filling process) is facilitated. Therefore, the short circuit member Sb can be easily manufactured.

  (14) In the above manufacturing method, before the removing step of removing (punching) the inner connecting portion 51 and the outer connecting portion 52 of the two conductive plate members 53 stacked, each connecting portion 35a, An insulating material 32 that keeps an interval of 35b is filled and cured. Therefore, after the removing step, the insulating member 32 has an interval between the members composed of the connecting portions 35a and 35b and the outer peripheral terminals 33a and 33b and the inner peripheral terminals 34a and 34b connected by the connecting portions 35a and 35b. Kept.

  (15) In the manufacturing method described above, the punching process is performed in the first and second punching working portions 54 and 55 so that the connecting portions 35a and 35b are formed in opposite directions when viewed from the same direction. Then, the two conductive plate members 53 punched by the first and second punching work sections 54 and 55 are moved to the common stacking work section 56 in the same direction, and the stacking process is performed. Therefore, each working part 54-56 can always be moved. Moreover, it is not necessary to invert either one of the punched conductive plate 53 so that the connecting portions 35a and 35b are opposite to each other. From these things, high-speed manufacture of the short circuit member Sb is attained efficiently.

The above embodiment may be modified as follows.
The commutator S (commutator body Sa and short-circuit member Sb) of the above embodiment may be changed to a commutator 61 (commutator body 62 and short-circuit member 63) shown in FIG. As shown in FIG. 13, the short-circuit member 63 is different from the above-described embodiment (outer peripheral terminals 33a and 33b) in the shape of the outer peripheral terminal 63a. Specifically, the outer peripheral end 63a of this example is not formed with the locking portions (36a, 36b) for locking the windings of the above embodiment. The width of the outer terminal 63a (the width in the circumferential direction when viewed from the axial direction) is set to be substantially the same as the width of the connecting portion 63b (substantially the same shape as the connecting portions 35a and 35b in the embodiment). . Further, the commutator body 62 has a pair of locking portions 64a (for locking the windings) projecting radially outward in each segment portion 64. And the outer peripheral side terminal 63a is arrange | positioned (caulking and fixing) so that it may be pinched | interposed into the base end side of a pair of latching | locking part 64a. In this example, the portion sandwiching the outer peripheral side terminal 63a constitutes a concave portion opened in the axial direction of the segment portion 64, and the portion sandwiched by the outer peripheral side terminal 63a constitutes an insertion convex portion. Further, in this example, the short-circuit member 63 is provided so as to partially protrude from the commutator body 62 (extrude). Further, in this example, the outer peripheral side terminal 63a is not in contact with the inner periphery of the segment part 64 in the radial direction because the engaging part is not formed on the outer peripheral side terminal 63a and the width thereof is constant. You may carry out by changing in this way.

  The commutator S (commutator body Sa and short-circuit member Sb) of the above embodiment may be changed to a commutator 66 (commutator body 67 and short-circuit member 68) shown in FIG. As shown in FIG. 14, the short-circuit member 68 is formed in substantially the same shape as that of the other example (see FIG. 13), but the outer peripheral side terminal 68 a has a diameter from the outer peripheral surface of the commutator body 67 (segment portion 69). Specifically, the difference is that the radially outer end of the outer peripheral terminal 68a is formed (provided) so as to coincide with the outer peripheral surface of the commutator body 67 so as not to protrude outward in the direction. Further, the commutator body 67 has a pair of locking portions 69a (for locking the windings) protruding radially outward at one axial end of each segment portion 69. A pair of sandwiching portions 69b projecting in the axial direction is provided at the other end in the direction. And the outer peripheral side terminal 68a is arrange | positioned so that it may be pinched | interposed into a pair of clamping part 69b in the axial direction other end side of each segment part 69 (fixed). In this example, a portion (clamping portion 69b) that sandwiches the outer peripheral side terminal 68a constitutes a concave portion that opens in the axial direction of the segment portion 69, and a portion that is sandwiched by the outer peripheral side terminal 68a constitutes an insertion convex portion. . In this example, the outer peripheral terminal 68a is not in contact with the inner periphery of the segment 69 in the radial direction because no locking portion is formed on the outer peripheral terminal 68a and the width thereof is constant. You may carry out by changing in this way.

  The commutator S (commutator body Sa and short-circuit member Sb) of the above embodiment may be changed to a commutator 71 (commutator body 72 and short-circuit member 73) shown in FIG. As shown in FIG. 15, the short-circuit member 73 is formed in substantially the same shape as the other example (see FIG. 14), but the outer peripheral side terminal 73 a has a diameter from the outer peripheral surface of the commutator main body 72 (segment portion 74). Specifically, the difference is that the radially outer end of the outer peripheral side terminal 73a is formed (provided) so as to be disposed radially inward from the outer peripheral surface of the commutator body 72 so as not to protrude outward in the direction. The commutator body 72 has a connecting terminal portion 74a that protrudes in the axial direction at one axial end of the predetermined segment portion 74, and opens axially and radially inward at the other axial end of each segment portion 74. It has the connection recessed part 74b as a recessed part. And the outer peripheral side terminal 73a is arrange | positioned (welding fixation) so that it may be accommodated in the connection recessed part 74b by the axial direction other end side of each segment part 74. FIG. In this example, the portion accommodated in the connection concave portion 74b of the outer peripheral side terminal 73a constitutes an insertion convex portion. In this example, the outer peripheral side terminal 73 a is in contact with the inner periphery of the segment portion 74 in the radial direction. In this example, the commutator 71 is connected to the winding wire by inserting the connection terminal portion 74a into a coil terminal provided in an armature core (not shown). You may carry out by changing in this way.

  The commutator S (commutator body Sa and short-circuit member Sb) of the above embodiment may be changed to a commutator 76 (commutator body 77 and short-circuit member 78) shown in FIG. As shown in FIG. 16, the short-circuit member 78 is formed in substantially the same shape as the above-described another example (see FIG. 15), but a pair of outer peripheral side terminals 78 a and 78 b of different layers are formed by being shifted in the circumferential direction. (Not contacting in the stacking direction (axial direction)) and having a bent portion 78c bent in the axial direction and contacted (contacted) in the circumferential direction. The commutator body 77 has a connecting terminal portion 79a protruding in the axial direction at one axial end of the predetermined segment portion 79, and a protruding wall 79b protruding in the axial direction at the other axial end of each segment portion 79. Have The outer peripheral side terminals 78a and 78b are arranged (welded and fixed) so that the bent portions 78c are in contact with the inner periphery of the protruding wall 79b in the radial direction on the other axial end side of each segment portion 79. . In this example, the commutator 76 is connected to the winding by the connection terminal portion 79a being inserted into a coil terminal provided in an armature core (not shown). You may carry out by changing in this way.

  The commutator S (commutator body Sa and short-circuit member Sb) of the above embodiment may be changed to a commutator 81 (commutator body 82 and short-circuit member 83) shown in FIG. As shown in FIG. 17, the short-circuit member 83 is different from the above-described embodiment (outer peripheral terminals 33a and 33b) in the shape of the outer peripheral terminal 83a. Specifically, the outer peripheral side terminal 83a of this example is formed with auxiliary portions (36a, 36b) as auxiliary auxiliary portions 83b for engaging the windings of the above embodiment. That is, the commutator body 82 has a connecting terminal portion 84a protruding in the axial direction at one axial end of the predetermined segment portion 84, and the auxiliary locking portion 83b avoids the connecting terminal portion 84a (circumferential direction). In this example, they are formed and arranged (welded and fixed) so as to abut in the circumferential direction. In this example, the connecting terminal portion 84a is inserted into a coil terminal provided in an armature core (not shown) or the winding is locked to the auxiliary locking portion 83b, whereby the commutator 81 is connected to the winding. The That is, the commutator 81 can be connected to the winding at at least one of the connection terminal portion 84a and the auxiliary locking portion 83b. You may carry out by changing in this way.

  In the above embodiment, the insulating material 32 is interposed between the connecting portions 35a and 35b arranged in the stacking direction. However, the structure is changed to a configuration in which a gap is formed without providing an insulating material between the connecting portions arranged in the stacking direction. May be. Even if it does in this way, the short circuit of the connection parts arranged in a lamination direction with a space | gap is prevented. In the above-described embodiment, the insulating material 32 is also interposed between the connecting portions 35a and 35b arranged in the circumferential direction. However, the gap is formed without providing the insulating material between the connecting portions arranged in the circumferential direction. You may change to Even if it does in this way, the short circuit of the connection parts arranged in the circumferential direction in a space | gap is prevented.

The short-circuit member Sb of the above embodiment may be provided with a spacing member for keeping the spacing between the connecting portions 35a and 35b arranged in the stacking direction separately from the insulating material 32.
For example, as shown in FIGS. 18 and 19, during the insulating material filling process (before filling the resin material), the distance between the connecting portions 35a and 35b arranged in the stacking direction (axial direction) in the mold 86 (see FIG. 19). In this state, the insulating member (molten insulating resin material) 32 is filled. The spacing members 87 and 88 are in contact with the opposing surfaces of the connecting portions 35a and 35b, respectively, and are in contact with the mold 86 through the circumferential gaps of the opposing connecting portions 35a and 35b. Are arranged as follows. If it does in this way, it will prevent that connection part 35a, 35b will bend in the lamination direction (axial direction) and short-circuit by the pressure etc. of the insulating material 32 (molten insulating resin material) with which it fills. 18 and 19 show an example of the short-circuit member Sc in which the locking portions 36a and 36b of the short-circuit member Sb are not formed. Further, in FIG. 18, the short-circuit member Sc is illustrated even when the insulating material 32 is not provided. Moreover, in FIG. 19, in order to explain a manufacturing method easily, the cross section of the connection parts 35a and 35b is shown typically. Also, in this example, the inner connecting portion 51 and the outer connecting portion 52 are not formed in the punching process, the inner peripheral side terminal 89 is separated in the circumferential direction, and the outer peripheral side terminal 90 is not separated in the circumferential direction. That is, the outer peripheral side terminal connecting portion 91 (indicated by a one-dot chain line in FIG. 18) is formed as a connecting portion at the time of molding that is connected in a ring shape on the outer side in the radial direction of the connecting portions 35a and 35b. In this example, the outer peripheral terminal connecting portion 91 is still formed, and the segments of the commutator body are not separated in the circumferential direction, that is, a cylindrical conductive plate is provided on the outer periphery. In a simple state, the outer peripheral side terminal 90 and the outer peripheral side terminal connecting portion 91 are fixed to the cylindrical conductive plate member by welding or the like, and the short-circuit member Sc and the commutator body are fixed. Then, the cylindrical conductive plate material is cut so as to be divided in the circumferential direction to form a plurality of segment portions, and the outer peripheral side terminal connecting portion 91 is cut to separate the outer peripheral side terminal 90 in the circumferential direction. If it does in this way, the undercut process which divides | segments a cylindrical electroconductive board | plate material to the circumferential direction and forms a several segment part, and the removal process which removes the outer peripheral side terminal connection part 91 as a connection part at the time of shaping | molding are common. Therefore, the manufacturing cost of the commutator can be reduced and the manufacturing cost can be reduced. Further, in this example, for example, the commutator body has the structure in which the engaging portion is formed at the opposite end to the side where the short-circuit member Sc is fixed, so that the commutator body requires the short-circuit member Sc as it is. A commutator that does not (not short-circuit) can be used.

  In the above embodiment, the number of segments (segment portions 1 to 24) is 24 and the commutator S is short-circuited at intervals of 120 degrees. It may be embodied in different things.

  For example, the number of segments may be 16 and they may be commutators that are short-circuited at intervals of 180 degrees, and may be changed to a short-circuit member 96 as shown in FIGS. In other words, the short-circuit member 96 includes 16 outer peripheral terminals 97a and 97b, inner peripheral terminals 98a and 98b, outer peripheral terminals 97a and 97b, and inner peripheral terminals 98a and 98b in the circumferential direction. The connecting portions 99a and 99b, which are connected to each other by 90 degrees, are composed of two short circuit component groups 96a and 96b formed on the same plane.

  In this example, as shown in FIG. 21, the connecting portions 99a and 99b are curved in the axial direction with respect to the outer peripheral side terminals 97a and 97b and the inner peripheral side terminals 98a and 98b so as to be separated from each other. In non-contact. 20 and 21, the insulating material that fills each gap is omitted, and in FIG. 21, the cross sections of the connecting portions 99a and 99b are schematically shown for easy visual understanding. In this example, the outer peripheral side terminals 97a and 97b, the inner peripheral side terminals 98a and 98b, and the connecting portions 99a and 99b are all formed with the same thickness. In other words, in this example, since the connecting portions 99a and 99b are curved with respect to the outer peripheral side terminals 97a and 97b and the inner peripheral side terminals 98a and 98b so as to be separated from each other, all have the same thickness. (There is no need to process to different thicknesses), and the short-circuit constituting member groups 96a and 96b can be easily obtained from a plate having a constant thickness.

  Further, as shown in FIG. 22, the connecting portions 99a and 99b of the other examples are bent (bent) in the axial direction with respect to the outer peripheral side terminals 97a and 97b and the inner peripheral side terminals 98a and 98b so as to be separated from each other. By doing so, the connecting portions 100a and 100b may be changed to non-contact.

  In the above embodiment, the connecting portions 35a and 35b are formed thinner than the outer peripheral side terminals 33a and 33b and the inner peripheral side terminals 34a and 34b (a step D is formed in the connecting portions 35a and 35b). However, the connecting portion may be configured with the same thickness (no step) as the outer peripheral side terminals 33a and 33b and the inner peripheral side terminals 34a and 34b with insulating paper interposed between the connecting portions arranged in the stacking direction.

  In the above embodiment, the positioning recess 27 is formed in the main body insulating material H, and the positioning convex portion 32a is formed in the insulating material 32. You may change into the positioning part of another shape. Moreover, it is good also as a structure which abbreviate | omitted the positioning recessed part 27 and the positioning convex part 32a.

  In the embodiment described above, the outer peripheral terminals 33a and 33b and the inner peripheral terminals 34a and 34b are respectively provided with fitting recesses 37a, 37b, 38a, and 38b and fitting protrusions 39a, 39b, 40a, and 40b. Although they are alternately formed in the direction, they may be formed on at least one of the outer peripheral terminals 33a and 33b and the inner peripheral terminals 34a and 34b. Also, fitting concave portions are formed in all of the inner peripheral side terminal and the outer peripheral side terminal in one short-circuit constituent member group, and fitting convex portions are provided in all of the inner peripheral side terminal and outer peripheral side terminal in the other short-circuit constituent member group. It is good also as the formed structure. In this case, the pair of short-circuit component members has a slightly different shape. However, in the manufacturing apparatus of the above-described embodiment (by partially changing the molds in the first and second punching working parts 54 and 55). ) Can be manufactured easily. Further, as a configuration in which the fitting concave portions 37a, 37b, 38a, 38b and the fitting convex portions 39a, 39b, 40a, 40b are omitted, for example, the outer peripheral terminals and the inner peripheral terminals are fixed by welding or the like. Also good.

-In above-mentioned embodiment, although connection part 35a, 35b was formed along the involute curve, it may be changed into another curve shape and it is good also as a straight line shape.
In the above embodiment, the axially ends of the segment portions 1 to 24 are formed with the recessed portions 25 opened in the axial direction, and the locking portions 36a and 36b are formed by the pair of arm portions 25a constituting the recessed portions 25. Although the fastening is fixed, the locking portions 36a and 36b may be fixed to the segment portions 1 to 24 (concave portion 25) by welding or the like.

  In the above embodiment, the punching process is performed in the first and second punching working parts 54 and 55 so that the connecting parts 35a and 35b are formed in opposite directions when viewed from the same direction. The lamination process may be performed by inverting one of the punched conductive plate 53 so that the connecting portions 35a and 35b are opposite to each other.

The technical idea that can be grasped from the above embodiments will be described below together with the effects thereof.
(A) The short-circuit member according to claim 2, further comprising an interval holding member for holding an interval between the connecting portions arranged in the stacking direction separately from the insulating material. If it does in this way, since it has an interval maintenance member for maintaining the interval of the above-mentioned connecting parts arranged in a laminating direction apart from the above-mentioned insulating material, for example, it fills up at the time of the insulating material filling process of filling and forming the insulating material It is possible to prevent the connecting portions from being short-circuited by the pressure of the insulating material to be used.

  (B) In the commutator according to claim 7, the outer peripheral end is formed with a locking portion for locking a winding that extends radially outward and protrudes to the outside. Commutator. If it does in this way, since a short circuit member will be arranged in the direction of an axis and the space of a stop required for a commutator, a short circuit member will not lengthen the axial direction length of a commutator. .

  (C) In the method of manufacturing a short-circuit member according to claim 17, a gap holding member is provided in the mold to hold a gap between the connecting portions arranged in the stacking direction in the insulating material filling step. A method for manufacturing a short-circuit member, comprising filling a material. In this way, at the time of the insulating material filling step, the mold is provided with the interval holding member for holding the interval between the connecting portions arranged in the stacking direction and filled with the insulating material. It is possible to prevent the connecting portions from being short-circuited due to the pressure or the like.

1 is a schematic configuration diagram of a motor in the present embodiment. Sectional drawing of the motor in this Embodiment. Sectional drawing of the commutator in this Embodiment. (A) The top view of the short circuit member in this Embodiment. (B) AA sectional drawing of (a). Explanatory drawing for demonstrating the manufacturing method of the short circuit member of this Embodiment. Explanatory drawing for demonstrating the manufacturing method of the short circuit member of this Embodiment. Explanatory drawing for demonstrating the manufacturing method of the short circuit member of this Embodiment. Explanatory drawing for demonstrating the manufacturing method of the short circuit member of this Embodiment. Explanatory drawing for demonstrating the manufacturing method of the short circuit member of this Embodiment. Explanatory drawing for demonstrating the fixing structure of the commutator main body and short circuit member of this Embodiment. Explanatory drawing for demonstrating the fixing structure of the commutator main body and short circuit member of this Embodiment. Explanatory drawing for demonstrating the armature of this Embodiment expand | deployed planarly. The perspective view of the commutator in another example. The perspective view of the commutator in another example. The perspective view of the commutator in another example. The perspective view of the commutator in another example. The perspective view of the commutator in another example. Explanatory drawing for demonstrating the short circuit member in another example. Explanatory drawing for demonstrating the short circuit member in another example. Explanatory drawing for demonstrating the short circuit member in another example. The schematic cross section of the short circuit member in another example. The short circuit member in another example is a schematic sectional view.

Explanation of symbols

  1 to 24, 64, 69, 74, 79, 84 ... segment part, 25 ... concave part, 25a ... arm part, 26 ... short-circuit member accommodating concave part (short-circuit member accommodating part), 28 ... shaft through hole, 31a, 31b, 96a , 96b ... Short-circuit component group, 32 ... Insulating material, 32a ... Positioning convex part (positioning part), 33a, 33b, 63a, 68a, 73a, 78a, 78b, 83a, 90, 97a, 97b ... Outer terminal, 34a , 34b, 89, 98a, 98b ... inner peripheral side terminal, 35a, 35b, 63b, 99a, 99b, 100a, 100b ... connection part, 36a, 36b ... locking part (insertion convex part), 37a, 37b, 38a, 38b ... fitting concave part, 39a, 39b, 40a, 40b ... fitting convex part, 51 ... inner connecting part (molding connecting part), 52 ... outer connecting part (molding connecting part), 53 ... conductive plate material, 54 ... No. Punching working part, 55 ... second punching working part, 56 ... stacking working part, 91 ... outer peripheral side terminal connecting part (molding connecting part), H ... main body insulating material, Sa ... commutator body, Sb, Sc ... short circuit member , B1, B2... Anode-side and cathode-side power supply brushes (brushes).

Claims (18)

A plurality of peripheral terminals arranged in the circumferential direction;
A plurality of inner peripheral terminals arranged in the circumferential direction inside the outer peripheral terminal;
A short-circuit component member group in which a plurality of connecting portions that connect the outer peripheral side terminal and the inner peripheral side terminal with a predetermined angle shift in the circumferential direction are formed in the same plane, the connecting portion is reversed. A short circuit member, wherein a plurality of the outer peripheral side terminals and the inner peripheral side terminals are contacted in the stacking direction, and the connecting portions are non-contacted in the stacking direction. The short-circuit member according to claim 1,
The connecting portion is formed thinner than the outer peripheral side terminal and the inner peripheral side terminal,
A short-circuit member characterized in that an insulating material is interposed between the connecting portions arranged in the stacking direction. The short-circuit member according to claim 1,
The short-circuit member, wherein the connecting portions are made non-contact by being bent or curved in the axial direction with respect to the outer peripheral side terminal and the inner peripheral side terminal so as to be separated from each other. The short-circuit member according to claim 2,
A short-circuit member having a positioning portion for positioning in the circumferential direction formed in the insulating material. In the short circuit member according to any one of claims 1 to 4,
A short-circuit member, wherein fitting concave portions and fitting convex portions are alternately formed in a circumferential direction on at least one of the outer peripheral side terminal and the inner peripheral side terminal in the short-circuit component group. In the short circuit member according to any one of claims 1 to 5,
The connecting portion is formed along an involute curve. The short-circuit member according to any one of claims 1 to 6,
A commutator comprising a plurality of commutator bodies provided in the circumferential direction and having segment portions respectively connected to the outer peripheral side terminal or the inner peripheral side terminal. A commutator including a commutator body having a plurality of segment portions provided in the circumferential direction,
A plurality of outer peripheral terminals arranged in the circumferential direction, an inner peripheral terminal arranged in the circumferential direction inside the outer peripheral terminal, and the outer peripheral terminal and the inner peripheral terminal are shifted by a predetermined angle in the circumferential direction. A plurality of connecting parts that are connected to each other in the same plane, the plurality of connecting parts are stacked so that the connecting parts are reversed, and the outer peripheral terminals are connected together to the segment part. A commutator including a short-circuit member in which the inner peripheral terminals are brought into contact with each other by being stacked and the connecting portions are not in contact with each other. The commutator according to claim 7 or 8,
The commutator body, the plurality of segment portions are substantially cylindrical, the brush is contacted from the radially outer side, and has a short-circuit member accommodating portion on the radially inner side of the segment portion,
The commutator, wherein the short-circuit member is housed in the short-circuit member housing portion. The commutator according to claim 9, wherein
The commutator, wherein the short-circuit member is provided so as not to protrude outward in the axial direction from an axial end surface of the commutator body. The commutator according to claim 9 or 10,
The commutator body has a body insulating material in which a shaft through-hole into which a rotation shaft is inserted is formed on the radially inner side of the segment part,
The commutator, wherein the inner peripheral terminal is disposed radially outside the shaft through hole. The commutator according to any one of claims 9 to 11,
The commutator, wherein the short-circuit member is provided so as not to protrude radially outward from an outer peripheral surface of the commutator body. The commutator according to any one of claims 9 to 12,
A concave portion opened in the axial direction is formed at the axial end of the segment portion,
The outer peripheral terminal is formed with an insertion convex portion that extends radially outward and can be inserted into the concave portion from the axial direction.
The commutator, wherein the short-circuit member is arranged at an axial end of the commutator body with the insertion convex portion inserted into the concave portion. The commutator according to any one of claims 9 to 11,
A concave portion opened in the axial direction is formed at the axial end of the segment portion,
The outer peripheral side terminal is formed with a locking portion for locking the winding extending outward in the radial direction and projecting outside through the recess,
The commutator, wherein the locking portion is fixed by caulking with a pair of arm portions constituting the concave portion. The commutator according to any one of claims 9 to 14,
The commutator, wherein the outer peripheral end is in contact with the inner periphery of the segment portion in the radial direction. It is a manufacturing method of the short circuiting member according to any one of claims 1 to 6,
At least each of the connecting portions is formed to be spaced apart in the circumferential direction, and the conductive connecting portions are formed so as to form a connecting portion during molding that connects the connecting portions in an annular shape at least one of the radially inner side and the radially outer side. Punching process of punching
After the punching step, a stacking step of stacking a plurality of punched conductive plate materials with the connecting portion in the reverse direction;
After the said lamination process, the removal process which removes at least the said connection part at the time of a shaping | molding of the several laminated | stacked electroconductive board | plate material was provided, The manufacturing method of the short circuit member characterized by the above-mentioned. In the manufacturing method of the short circuiting member according to claim 16,
A method of manufacturing a short-circuit member, comprising an insulating material filling step that is provided after the lamination step and before the removing step, by filling and curing an insulating material that keeps the interval between the connecting portions. In the manufacturing method of the short circuiting member according to claim 16 or 17,
The punching process is performed in the first and second punching working parts so that the connecting parts are formed in opposite directions when viewed from the same direction, and punched in the first and second punching working parts. A method for manufacturing a short-circuit member, wherein the two laminating steps are performed by moving two conductive plate members as they are to a common laminating work section.

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