JP4800702B2 - Armature and DC motor - Google Patents

Description

  The present invention relates to an armature and a DC motor.

Conventionally, in an armature of a DC motor, a winding and a commutator are electrically connected. As such a DC motor (armature), there is one in which an end portion (free end) of a conducting wire extending from a winding wound around an armature core is connected to a connection portion in a commutator segment ( For example, see Patent Document 1).
JP 2003-299292 A

  However, in the DC motor (armature) as described above, the end (free end) of the conducting wire extending from the winding is connected to the commutator connection in an independent process different from the process of winding the winding. Therefore, the connection work becomes complicated.

  On the other hand, in order to eliminate the end portion (free end) of the conducting wire that is complicated to handle, the winding wound around each tooth portion of the armature core and the connecting wire connecting the plurality of windings (continuous) An armature is conceivable which is constructed in succession (with conductors) and connects a part of its connecting wire to the connection in the commutator segment. However, on the side where the commutator in the armature core is arranged, such as when the connecting wire extends in the circumferential direction so as to connect the windings straddling two or more teeth, the connecting wires overlap, When connecting to the connecting portion, there is a concern that the crossover line (not applicable) becomes an obstacle or the crossover line (not applicable) is damaged.

  The present invention has been made to solve the above-described problems, and its purpose is to facilitate connection work while preventing damage to the crossover wires when electrically connecting the windings to the commutator. An object is to provide an armature and a direct current motor.

In the first aspect of the present invention, the armature core having a plurality of radially extending teeth portions, the winding wound around the teeth portions of the armature core in a concentrated winding, and the plurality of windings are connected. In the armature including a conductor wire that continuously forms a crossover and a commutator that has a plurality of segments and is disposed on one end side in the axial direction of the armature core, the winding is the armature core Is electrically connected to the segment at one end in the axial direction of the armature, and the connecting wire is disposed at the other end in the axial direction of the armature core, and has a diameter between adjacent teeth portions in the armature core. A groove extending in the axial direction in a shape recessed inward in the direction was provided, and a conductor connecting portion connecting the conductor connecting portion connected to the segment and the connecting wire in the conductor was disposed in the groove .

According to a second aspect of the present invention, in the armature according to the first aspect, the connecting wire is guided along the circumferential direction on the other axial end side of the armature core, radially inward from the teeth portion. The guide part for doing was provided.

According to a third aspect of the present invention, in the armature according to the first or second aspect , the commutator has a connection portion extending from the segment, and the armature core is connected to the winding. An insulator interposed therebetween is mounted, and on one end side in the axial direction of the insulator, there is a separating portion that is arranged corresponding to each tooth portion and separates some of the windings from other windings. The connecting portion is electrically connected to the part of the windings.

According to a fourth aspect of the present invention, in the armature according to the first or second aspect , the armature core is provided with a resin insulator interposed between the winding and the groove and the guide. At least one of the parts is integrally formed with the insulator.

According to a fifth aspect of the present invention, the armature according to any one of the first to fourth aspects, a plurality of power supply brushes pressed against the commutator, and a plurality of armature cores disposed so as to surround the armature core. The gist of the present invention is a DC motor including a stator having a magnet.
(Function)
According to the first aspect of the present invention, the winding is electrically connected to the segment on one end side in the axial direction of the armature core (the side on which the commutator is disposed), and the crossover is connected in the axial direction or the like in the armature core. Since it is arranged on the end side, it is possible to prevent the crossover wires from interfering when connecting the windings and the segments, and as a result, the connection work can be easily performed while preventing the crossover wires from being damaged.

In addition , since the lead wire connecting portion for connecting the lead wire connecting portion connected to the segment and the crossover wire is disposed in the groove extending in the axial direction in a shape recessed radially inward between the adjacent tooth portions, The conductor connecting portion can be easily arranged at a fixed position, and accordingly, the conductor connecting portion and the crossover can be easily arranged at a predetermined position. In addition, since the conducting wire connecting portion can be easily arranged at a fixed position different from the portion around which the winding is wound, it is possible to reduce that the conducting wire connecting portion obstructs the winding operation of the winding. As a result, the winding disturbance can be reduced.

According to the second aspect of the present invention, the other end side in the axial direction of the armature core is provided with a guide wall portion for guiding the connecting wire along the circumferential direction radially inward from the teeth portion. For example, it is possible to reduce the situation where the crossover wire comes into contact with the rotating shaft or the winding on which the armature core is fixed.

According to the third aspect of the present invention, the insulator is provided corresponding to each tooth portion and provided with a separating portion for separating a part of the windings from the other windings. Some windings and other windings are separated. Since the connection portion is electrically connected to the part of the windings, the other windings are prevented from interfering with the connection of the part of the windings and the connection portion. In addition, since the part of the windings are wound, they are difficult to move and are in a stable state, so that the connection work can be performed in the stable state. Therefore, the connection work can be easily performed while preventing damage (short circuit) of the windings (other windings).

According to the fourth aspect of the present invention, since at least one of the groove and the guide portion is integrally formed with a resin insulator that can be easily molded, the groove and the guide portion can be easily provided.

According to the invention described in claim 5 , the effect of the invention described in any one of claims 1 to 4 can be obtained in the DC motor.

  ADVANTAGE OF THE INVENTION According to this invention, the armature and DC motor which can perform a connection operation | work easily can be provided, preventing the damage of a crossover in electrically connecting a coil | winding to a commutator.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the DC motor 101 of this embodiment includes a stator 102 and an armature (rotor) 103. The stator 102 includes a substantially cylindrical yoke housing 104 and a plurality (six in this embodiment) of magnets 105 arranged and fixed at equal angular intervals on the inner peripheral surface of the yoke housing 104. In the present embodiment, six magnets (six poles) are provided, and the number of magnetic poles is six.

  As shown in FIGS. 1 and 2, the armature 103 includes a rotating shaft 106, an armature core 107 fixed to the rotating shaft 106, and a commutator 108 that is also fixed to the rotating shaft 106. As shown in FIG. 2, the armature 103 can be rotated by a bearing G held on a housing including a yoke housing 104 (specifically, an end housing E that closes the yoke housing 104 and its opening) on both ends of the rotating shaft 106. It is supported by. In this state, the anode-side and cathode-side brushes 109a and 109b, which are held by the end housing E and perform power feeding, are pressed and slidably contacted with the outer periphery of the commutator 108. In this state, the armature core 107 is disposed so as to face the magnet 105 and be surrounded by the periphery.

  The armature core 107 has eight teeth T1 to T8 that extend radially about the rotation shaft 106, and slots S1 to S8 are formed between the teeth T1 to T8, respectively (FIG. 1). And FIG. 4 (a)).

  More specifically, as shown in FIG. 5, the armature core 107 has an annular fixed portion in which the rotation shaft 106 is fitted and a circumferential connection portion 107 a that connects the base ends of the teeth T <b> 1 to T <b> 8 in the circumferential direction. A portion 107b and a radial connecting portion 107c extending radially inward from a portion of the circumferential connecting portion 107a in the circumferential direction (every 90 °) and connecting the circumferential connecting portion 107a and the fixing portion 107b.

  An insulator X (see FIG. 5) is attached to one end side (upper side in FIG. 2) of the armature core 107 where the commutator 108 is disposed, and the other end side in the axial direction (lower side in FIG. 2). The insulator Y (see FIG. 6) is mounted on the side.

  As shown in FIG. 5, the insulator X corresponds to the annular covering portion Xa covering the circumferential connecting portion 107a, the teeth covering portion Xb covering the teeth T1 to T8, and the base ends of the teeth T1 to T8. The separation portion Xc arranged in the above-described manner and a placement convex portion Xd as a placement portion disposed on the radially inner side of the separation portion Xc (that is, on the annular covering portion Xa) are provided. The insulator X is made of resin, and the respective parts (the annular covering part Xa, the teeth covering part Xb, the separating part Xc, and the mounting convex part Xd) are integrally formed. The annular covering portion Xa includes an axial covering portion Xe that covers the circumferential connecting portion 107a from the axial direction, and a radial covering portion that covers the outer peripheral surface (between adjacent teeth T1 to T8) of the circumferential connecting portion 107a from the radial direction. Xf. The radial covering portion Xf is formed in a rectangular shape when viewed from the axial direction so as to protrude outward in the radial direction toward the center between the teeth T1 to T8 adjacent in the circumferential direction, and is recessed radially inward at the corner. A groove Xg extending in the axial direction is formed. The angular angle is an angle corresponding to a regular octagon. The groove Xg is recessed in a substantially arc shape. Further, the separation part Xc protrudes in the axial direction from the tooth coating part Xb. The separation part Xc is formed so as to partition the teeth covering part Xb side and the placement convex part Xd side at the base end parts of the teeth T1 to T8. Further, the separation portion Xc is provided with a recess Xh extending from the radially inner side to the radially outer side. Moreover, the mounting convex part Xd protrudes in the axial direction from the teeth covering part Xb, and the protruding amount is set smaller than that of the separating part Xc. The mounting convex portion Xd of the present embodiment is formed in a substantially trapezoidal shape as viewed from the radial direction (a substantially trapezoidal shape in which the shorter of the two parallel sides is set at the tip (top surface)) ( (See FIG. 7).

  As shown in FIG. 6, the insulator Y corresponds to the annular covering portion Ya covering the circumferential connecting portion 107a, the teeth covering portion Yb covering the teeth T1 to T8, and the base end portions of the teeth T1 to T8. An outer wall Yc projecting in the axial direction intermittently in the circumferential direction and an inner wall Yd projecting in the axial direction in a substantially cylindrical shape inside the outer wall Yc (inner edge of the annular covering portion Ya) are provided. In the present embodiment, the outer wall Yc and the inner wall Yd constitute a guide part. The insulator Y is made of resin, and the respective parts (the annular covering part Ya, the teeth covering part Yb, the outer wall Yc, and the inner wall Yd) are integrally formed. The annular covering portion Ya includes an axial covering portion Ye that covers the circumferential connecting portion 107a from the axial direction, and a radial covering portion that covers the outer peripheral surface (between adjacent teeth T1 to T8) of the circumferential connecting portion 107a from the radial direction. Yf. The radial covering portion Yf is formed in a square shape when viewed from the axial direction so as to protrude outward in the radial direction toward the center between the teeth T1 to T8 adjacent in the circumferential direction, and is recessed radially inward at the corner. A groove Yg extending in the axial direction is formed. The angular angle is an angle corresponding to a regular octagon. Further, the groove Yg is recessed in a substantially arc shape.

  The armature 103 has windings M1 to M8 wound in concentrated winding on the teeth T1 to T8 of the armature core 107 to which the insulators X and Y are mounted (through the slots S1 to S8). And the conducting wire D which comprises continuously the connecting wire 110 (refer FIG.2, FIG.9 and FIG.10) which connects several coil | windings M1-M8 is provided. FIG. 4A is a schematic diagram in which the armature 103 is developed in a planar shape. The windings M1 to M8 are entirely disposed in the radial direction of the teeth T1 to T8 by being wound around the teeth T1 to T8 (with respect to the teeth T1 to T8). It is arranged so as to have a binding force. The crossover wire 110 is disposed across (over) at least one of the teeth T1 to T8 disposed in the circumferential direction so as to connect the two teeth (in the direction perpendicular to the axis). It is arranged to have tension.

  That is, the conductive wire D of the present embodiment, for example, first forms a winding M1 by being wound around the tooth T1 in a concentrated manner, and then forms a connecting wire 110 that reaches the tooth T6 across the teeth T8 and T7. Then, a pattern in which the winding M6 is formed by concentrated winding on the tooth T6 is repeatedly provided (see FIG. 10). FIG. 10 illustrates an intermediate stage in the process of arranging the conductive wire D as described above.

  Here, each of the windings M1 to M8 is the separation portion Xc except for the end winding Ma (see FIGS. 1 and 7) as a part of the winding that is the final winding (last winding). Is wound around the teeth T1 to T8 on the outer side in the radial direction, and movement toward the inner side in the radial direction is restricted by the separation portion Xc. Further, the conducting wire connecting portion Mb which is a part of the end winding Ma is disposed on the mounting convex portion Xd. That is, each of the windings M1 to M8 is separated into an end winding Ma (partial windings) and other windings by the separation part Xc.

  Moreover, each crossover 110 is arranged avoiding the above-mentioned placement convex part Xd. In this embodiment, as shown in FIGS. 2, 9, and 10, each crossover wire 110 is disposed on the other end side in the axial direction of the armature core 107 (opposite side where the commutator 108 is disposed). Is done. Each connecting wire 110 is guided along the circumferential direction radially inward of the teeth T1 to T8 by the guide portions (the outer wall Yc and the inner wall Yd). Specifically, each of the crossover wires 110 is restricted from moving radially outward by the outer wall Yc, and restricted radially inward by the inner wall Yd.

  Further, in the conductive wire D, the conductive wire connecting portion Mc (see FIG. 9) for connecting the conductive wire connecting portion Mb (one axial end side) and the connecting wire 110 (the other axial end side) is formed in the grooves Xg and Yg. Placed (substantially half accommodated).

  As shown in FIG. 2, the commutator 108 includes a commutator body 111 and a short-circuit member 112. The commutator body 111 includes a substantially cylindrical main body insulating material 113 and 24 segments 1 to 24 (see FIG. 4A) disposed on the outer peripheral surface of the main body insulating material 113 in the circumferential direction. The segments 1 to 24 are substantially cylindrical on the outer periphery of the main body insulating material 113, and the anode side and cathode side brushes 109a and 109b are brought into contact (pressing contact) from the outside in the radial direction.

  The short-circuit member 112 is fixed to the axial end of the commutator body 111 and electrically connects the 24 segments 1 to 24 at intervals of 120 degrees as shown in FIG. , 9, 17 and segments 5, 13, 21 are short-circuited (same potential). Specifically, as shown in FIG. 3, the short-circuit member 112 includes 24 short-circuit pieces 115 and 116 disposed in two layers sandwiching an insulating layer (insulating paper) 114, respectively. Each short-circuit piece 115 on one side (the layer on the front side in FIG. 3) has its radially inner end shifted by 60 ° in the circumferential direction (clockwise in FIG. 3) with respect to the radially outer end. It is formed as follows. In addition, each short-circuit piece 116 on the other side (in FIG. 3, a layer on the back side of the paper and indicated by a broken line) has a radially inner end portion that is circumferentially opposite to a radially outer end portion (in FIG. 3). , In a counterclockwise direction). The short-circuiting pieces 115 and 116 of the two layers are electrically connected to each other between the radially inner ends and the radially outer ends (without sandwiching the insulating layer 114). Thereby, the radial direction outer side edge part of the short circuit pieces 115 and 116 in the short circuit member 112 will be electrically connected to a 120 degree space | interval. And the short circuit member 112 is being fixed to the commutator main body 111 so that each radial direction outer side edge part may be electrically connected to the segments 1-24, respectively. In the present embodiment, the other end (the layer on the back side of the paper in FIG. 3 and indicated by a broken line) extends radially outward from the segments 1 to 24 at the radially outer end of the short-circuit piece 116. A connecting portion 116a (see FIG. 8) is formed. The connection portion 116a is electrically connected and fixed on the conductive wire connection portion Mb, which is a part of the end winding Ma, and the placement convex portion Xd. In the present embodiment, the conductor connecting portion Mb and the connecting portion 116a are stacked on the placement convex portion Xd in the axial direction, and more specifically, the connection portion 116a sandwiches the conductor connecting portion Mb together with the placement convex portion Xd. Placed in. The connecting portion 116a is disposed at a position corresponding to the concave portion Xh and the circumferential direction. Further, the connection portions 116a are formed at intervals of three (that is, eight in total) in the circumferential direction of the 24 short-circuit pieces 116.

  In the armature 103 configured as described above, the windings M1 to M8 constitute one closed loop in total. Note that the windings M1 to M8 of this embodiment form a closed loop in the order of M1, M4, M7, M2, M5, M8, M3, M6, M1,. That is, when the circuit formed by the windings M1 to M8 in FIG. 4A is developed in a visually easy-to-understand manner, it is as shown in FIG. 4B.

Next, characteristic effects of the above embodiment will be described below.
(1) The windings M1 to M8 are electrically connected to the segments 1 to 24 (connecting portions 116a) of the commutator 108 on one end side in the axial direction of the armature core 107 (the side where the commutator 108 is disposed). The wire 110 is disposed on the other end side in the axial direction of the armature core 107 (the side opposite to the side where the commutator 108 is disposed). Therefore, the crossover wire 110 is prevented from interfering with the connection between the windings M1 to M8 (conductive wire connection portion Mb) and the connection portion 116a. As a result, the connection work can be easily performed while preventing damage to the crossover wire 110.

  (2) In the lead wire D, the lead wire connecting portion Mc (see FIG. 9) that connects the lead wire connecting portion Mb (one axial end side) and the connecting wire 110 (the other axial end side) is adjacent in the circumferential direction. It is arranged (substantially half accommodated) in the grooves Xg and Yg extending in the axial direction in a shape recessed radially inward between the teeth T1 to T8. Therefore, the conductor connecting portion Mc can be easily (stable) arranged at a fixed position, and the conductor connecting part Mb and the connecting wire 110 are also easily (stable) arranged at predetermined positions. be able to. Moreover, since the conducting wire connecting portion Mc can be easily arranged at a fixed position different from the portion where the windings M1 to M8 are wound, the conducting wire connecting portion Mc obstructs the winding work of the windings M1 to M8. Can be reduced, and consequently, the disturbance of the windings M1 to M8 can be reduced.

  (3) Each connecting wire 110 is guided along the circumferential direction radially inward from the teeth T1 to T8 by the guide portions (the outer wall Yc and the inner wall Yd) in the insulator Y. Specifically, each of the crossover wires 110 is restricted from moving radially outward by the outer wall Yc, and restricted radially inward by the inner wall Yd. Therefore, it is possible to reduce that the crossover wire 110 comes into contact with the rotating shaft 106 and the windings M1 to M8 (and eventually is damaged). Further, since the inner side wall Yd is substantially cylindrical, the crossover wire 110 is smoothly bent into a curved shape, and rapid bending (damage) is suppressed. In addition, since the outer wall Yc is intermittently provided in the circumferential direction, the crossover wire 110 (the conductive wire D) can be easily pulled in (without riding on) from the radially outer side where the windings M1 to M8 are disposed. The crossover wire 110 (conductive wire D) can be easily pulled out (without riding on) outward in the radial direction where the windings M1 to M8 are arranged.

  (4) The insulator X is provided with a separating portion Xc corresponding to each base end portion of the teeth T1 to T8, and windings excluding the end winding Ma (partial windings) which is the final winding. M1 to M8 (other windings) are restricted from moving radially inward by the separation portion Xc. In addition, a placement convex portion Xd is disposed on the radially inner side of the separation portion Xc in the insulator X, and the conductor connection portion Mb that is a part of the end winding Ma and the connection portion 116a of the commutator 108 are placed on the placement convex portion. Electrically connected on Xd. Therefore, it is possible to prevent the windings M1 to M8 excluding the end winding Ma from interfering with each other when the conductor connecting portion Mb and the connecting portion 116a are connected. Further, since the end winding Ma (conductive wire connecting portion Mb) is wound so as to pass over the mounting convex portion Xd, the conductive wire connection is made when electrically connecting on the mounting convex portion Xd. The connection work can be performed in a stable state because the part Mb becomes difficult to move. Accordingly, the connection work can be easily performed while preventing damage (short circuit) of the windings M1 to M8 (excluding the end winding Ma).

(5) Since the grooves Xg and Yg are integrally formed with resin insulators X and Y that are easy to mold, they can be easily provided.
(6) Since the guide portion (the outer wall Yc and the inner wall Yd) is integrally formed with the resin insulator Y that is easy to mold, it can be easily provided. The above embodiment may be modified as follows.

  In the above embodiment, the connecting portion 116a of the commutator 108 is arranged so as to sandwich the conductive wire connecting portion Mb which is a part of the end winding Ma together with the placement convex portion Xd, and is electrically connected. If the windings M1 to M8 are electrically connected to the commutator 108 (connecting portion 116a) on one end side in the axial direction of the armature core 107 (the side on which the commutator 108 is disposed), the configuration is changed. Also good.

  For example, as shown in FIG. 11, the conductive wire connecting portion Mb may be disposed so as to sandwich the connecting portion 116b together with the placement convex portion Xd and electrically connected. In this case, unlike the above embodiment, after the armature core 107 and the commutator 108 are fixed to the rotating shaft 106 (in a fixed state), the windings M1 to M8 and the crossover wire 110 are configured by the conductor D ( It is necessary to carry out a conductor arranging step).

  Further, for example, as shown in FIG. 12, the insulator does not have the above-described mounting convex portion or the like, but is disposed on the winding M and the crossover (on the other end side in the axial direction of the armature core, not shown). ) May be changed to a configuration in which the conductive wire connecting portion Md between the connecting portion 121 and the connecting portion 121a (segment) of the commutator 121 is electrically connected. In FIG. 12, only one conductor connecting portion Md is shown.

  In the above embodiment, between the teeth T1 to T8 adjacent in the circumferential direction, the grooves Xg and Yg extending in the axial direction are provided in a shape recessed inward in the radial direction, and a conductor is connected to the grooves Xg and Yg. Although the connecting portion Mc (see FIG. 9) is arranged, the shape and number of the grooves Xg and Yg may be changed, or the grooves may not be provided. In the above-described embodiment, the grooves Xg and Yg are integrally formed in the insulators X and Y, but may be directly formed in the armature core 107.

  In the above-described embodiment, the other end side in the axial direction of the armature core 107 is a guide portion (outer wall Yc and inner side for guiding the crossover wire 110 along the circumferential direction on the radially inner side from the teeth T1 to T8. Although the wall Yd) is provided, the shape or the like of the guide portions (outer wall Yc and inner wall Yd) may be changed, or the guide portion may not be provided. Moreover, in the said embodiment, although the guide part (the outer side wall Yc and the inner side wall Yd) was integrally formed in the insulator Y, you may provide separately.

  In the above embodiment, each of the windings M1 to M8 is outside the separation portion Xc in the radial direction except for the end winding Ma (see FIGS. 1 and 7) which is the final winding (last winding). The conductive wire connection portion Mb, which is a part of the end winding Ma, is disposed on the placement convex portion Xd. However, the end winding is the first winding (the first one). It may be changed to (winding). That is, each of the windings M1 to M8 is wound around the teeth T1 to T8 on the radially outer side of the separation portion Xc except for the end winding which is the first winding (first winding), and the end winding ( You may change so that the conducting wire connection part which is a part of 1st coil | winding) may be arrange | positioned on the mounting convex part Xd.

-The short circuit member 112 of the said embodiment may be changed into the thing of another structure, if predetermined segments can be electrically connected.
-In above-mentioned embodiment, although the connection part 116a of the commutator 108 was formed in the short circuit member 112 (the short circuit piece 116), if it is the structure extended from the segment of a commutator, it will not be limited to this. For example, a connecting portion integrally formed with the segment of the commutator body 111 may be used. Moreover, although the connection part 116a was made into the shape extended to the radial direction outer side from the segment, it is not limited to this, It is good also as a shape extended in the axial direction.

  In the above embodiment, the number of magnets 105 is 6, the number of slots S1 to S8 is 8, and the number of segments 1 to 24 is 24. However, the present invention is not limited to this. You may implement. For example, a DC motor with 8 magnets, 9 slots, and 36 segments, or a DC motor with 10 magnets, 12 slots, and 60 segments May be.

The technical idea that can be grasped from the above embodiments will be described below together with the effects thereof.
(B) pre-Symbol guide portion, characterized in that projecting axially in a substantially cylindrical shape including an inner wall for restricting the movement in the radial direction inside of the connecting wire. If it does in this way, it can reduce that a connecting wire contacts a rotating shaft, for example. Moreover, since the inner wall is substantially cylindrical, the crossover line is smoothly bent into a curved shape, and rapid bending is suppressed.

(B) pre-Symbol guide portion, you comprising an outer wall for the circumferential direction and projects intermittently axially restricts the radially outward movement of the connecting wire. If it does in this way, it can reduce that a connecting wire contacts a coil | winding. Moreover, since the outer wall is intermittently provided in the circumferential direction, the crossover wire can be easily drawn in from the radial direction outside where the winding is arranged, or the crossover wire is easily drawn out outside in the radial direction where the winding is arranged. Can be.

1 is a schematic configuration diagram of a motor in the present embodiment. FIG. 3 is a cross-sectional view of a main part of the motor in the present embodiment. The top view of the short circuit member in this Embodiment. (A) Explanatory drawing for demonstrating the armature of this Embodiment expand | deployed planarly. (B) The circuit diagram formed with the coil | winding of the armature of this Embodiment. The top view of the insulator and armature core of the axial direction one end side of this Embodiment. The bottom view of the insulator and armature core of the axial direction other end side of this Embodiment. The principal part expansion perspective view for demonstrating the armature in this Embodiment. The principal part expansion perspective view for demonstrating the armature in this Embodiment. The principal part expanded bottom view for demonstrating the armature in this Embodiment. The perspective view for demonstrating the armature in this Embodiment. The principal part expansion perspective view for demonstrating the armature in another example. The principal part expansion perspective view for demonstrating the armature in another example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1-24 ... Segment, 102 ... Stator, 103 ... Armature, 105 ... Magnet, 107 ... Armature core, 108 ... Commutator, 109a, 109b ... Anode side and cathode side brush (power supply brush), 110 ... Crossing Wire, 116a ... Connection portion, D ... Conducting wire, M1-M8 ... Winding, Ma ... End winding (partial winding), Mc ... Conducting wire connecting portion, T1-T8 ... Teeth (tooth portion), X, Y ... insulator, Xc ... separation part, Xg, Yg ... groove, Yc ... outer wall constituting part of guide part, Yd ... inner side wall constituting part of guide part.

Claims (5)

An armature core having a plurality of teeth extending radially;
A conductive wire that continuously constitutes a winding wound around each of the teeth portions of the armature core in a concentrated manner and a crossover that connects the plurality of windings;
In the armature provided with a commutator having a plurality of segments and disposed on one end side in the axial direction of the armature core,
The winding is electrically connected to the segment at one axial end side of the armature core,
The crossover is disposed on the other axial end side of the armature core ,
Between the adjacent tooth portions in the armature core, a groove extending in the axial direction is provided in a shape recessed radially inward,
The armature , wherein a conductor connecting portion that connects the conductor connecting portion connected to the segment and the jumper wire is disposed in the groove . The armature according to claim 1 ,
An armature characterized in that a guide portion is provided on the other end side in the axial direction of the armature core so as to guide the connecting wire along the circumferential direction on the radially inner side from the tooth portion. The armature according to claim 1 or 2 ,
The commutator has a connection extending from the segment;
An insulator interposed between the windings is mounted on the armature core,
On the one end side in the axial direction of the insulator, a separating portion is provided for separating a part of the windings from the other windings, corresponding to each tooth portion,
The armature, wherein the connection portion is electrically connected to the part of the windings. The armature according to claim 1 or 2 ,
The armature core is provided with a resin insulator interposed between the windings,
At least one of the groove and the guide part is formed integrally with the insulator. The armature according to any one of claims 1 to 4 ,
A DC motor comprising: a power supply brush pressed against the commutator; and a stator having a plurality of magnets disposed so as to surround the armature core.

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