JP4745751B2 - Armature, DC motor and method of manufacturing armature - Google Patents

Description

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

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) A continuous armature (with conductors) is conceivable. However, in such a configuration, there is a problem in what configuration and method the conductive wire (winding) and the connection portion are brought into intimate contact to be electrically connected (for example, welding).

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an armature, a DC motor, and an armature manufacturing method capable of easily connecting a winding and a commutator. Is to provide.

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. a lead constituting a connecting wire in succession, e Bei a commutator having a connecting portion extending from a plurality of segments and said segments, said connecting portion is electrically in a state of being pressed in contact with the conductor The armature core is connected with a resin insulator interposed between the windings, and the connecting portion is disposed so as to sandwich the conductor together with the insulator. It was .

In the invention according to claim 2, the armature core having a plurality of teeth portions extending radially, the winding wound around each tooth portion of the armature core by concentrated winding, and the plurality of the windings are connected. A conductor comprising a connecting wire continuously; and a commutator having a plurality of segments and a connecting portion extending from the segment, wherein the connecting portion is electrically connected in a state of being pressed against the conducting wire. The connecting portion has an arc-shaped contact portion substantially along the outer peripheral surface of the conducting wire, and the contacting portion is pressed against the conducting wire.
According to a third aspect of the present invention, in the armature according to the first or second aspect , the connecting portion has flexibility, and is pressed into contact with the conductive wire by the flexibility.
According to a fourth aspect of the present invention, in the armature according to any one of the first to third aspects, the connecting portion is one end coil that is the first or last winding of the windings. Electrically connected to the part.

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.

In the invention according to claim 6 , the armature core having a plurality of teeth portions extending radially, and the winding wound around each tooth portion of the armature core by concentrated winding and the plurality of the windings are connected. A method of manufacturing an armature, comprising: a conducting wire that continuously forms a crossover wire; and a commutator having a plurality of segments and connecting portions extending from the segments, wherein the commutation is performed with respect to the armature core. By positioning the child, a pressing contact step for pressing and contacting the connecting portion to the conducting wire, and a connecting step for electrically connecting the connecting portion and the conducting wire after the pressing contacting step are provided.
(Function)
According to the first and second aspects of the present invention, the winding wound around each tooth portion of the armature core and the connecting wire connecting the plurality of windings are continuously connected by the (continuous) conductor. Since it is configured, the end portion (free end) of the conducting wire (for connecting to the commutator) that is complicated to handle as in the prior art is eliminated. And since the connection part of a commutator is electrically connected in the state press-contacted to conducting wire, a connection operation (for example, welding) can be performed easily. That is, there is no need to keep the connecting portion and the lead wire in close contact with each other (for example, with a device (jig) other than a welding jig) during the connection work, so there is room for the connection work space, Shortening can be achieved.
In addition, according to the first aspect of the present invention, since the connecting portion is arranged so as to sandwich the conducting wire together with the insulator, the connecting portion can be brought into a state in which the connecting portion is securely and strongly pressed against the conducting wire. Can be easily performed.
According to the second aspect of the present invention, the connecting portion has an arc-shaped abutting portion substantially along the outer peripheral surface of the conducting wire, and the abutting portion is pressed into contact with the conducting wire. On the other hand, it is prevented that the lead wire moves so as to escape, and a stable pressing contact can be achieved.

According to the third aspect of the present invention, since the connecting portion has flexibility and is pressed and brought into contact with the conducting wire by the flexibility, for example, even if the axial positioning accuracy of the connecting portion and the conducting wire varies. The variation is absorbed by the flexibility and can be pressed and contacted well.

According to the invention described in claim 4 , since the connecting portion is electrically connected to a part of the end winding which is the first or last winding among the windings, the connecting wire is connected to a predetermined wire. It can be in a stable state in position. That is, the winding (end winding) is less likely to move than the crossover by being wound, and it is easy to hold a part of the end winding that is the first or final winding in a predetermined position. The connecting portion can be easily pressed into contact with the conducting wire (a part of the end winding), and the connecting operation can be performed more easily.

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.
According to the sixth aspect of the present invention, the winding wound around each tooth portion of the armature core and the connecting wire connecting the plurality of windings are continuously constituted by (continuous) conducting wires. Thus, the end portion (free end) of the conducting wire (for connecting to the commutator) becomes complicated as in the prior art. Then, the commutator is positioned with respect to the armature core in the pressing contact step, so that the connecting portion is pressed into contact with the conductor, and the connecting portion and the conductor are electrically connected (for example, welding) in the subsequent connecting step. Therefore, connection work can be performed easily. That is, since the connecting portion is simultaneously pressed and brought into contact with the conducting wire in the originally essential process of positioning the commutator with respect to the armature core, it is possible to perform the connection work (for example, with a device (jig) other than the welding jig). ) Since there is no need to hold the connecting portion and the conductive wire in close contact with each other, the connecting work space can be afforded and the connecting work time can be shortened.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the armature, DC motor, and armature which can perform the connection operation | work of a coil | winding and a commutator easily can be provided.

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. And a placement portion Xd (which is a part of the annular covering portion Xa in the present embodiment) disposed on the radially inner side of the separation portion Xc. The insulator X is made of resin, and the respective parts (annular covering part Xa (mounting part Xd), teeth covering part Xb, and separating part Xc) 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 part Xd side at the base ends 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.

  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 a tooth T1 on the radially outer side of the separation portion Xc except for the end winding Ma (see FIGS. 1 and 7) which is the final winding (last winding). Wrapped around T8, the movement inward in the radial direction is restricted by the separation portion Xc. The conducting wire connecting portion Mb, which is a part of the end winding Ma, is disposed on the placement 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.

  Further, each of the crossover wires 110 is arranged avoiding the placement portion Xd. In the present embodiment, as shown in FIGS. 2 and 10, each crossover wire 110 is arranged 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 arranged). 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 lead wire D, the lead wire connecting portion Mc (see FIG. 1) for connecting the lead wire connecting portion Mb (on the one end side in the axial direction) and the connecting wire 110 (on the other end side in the axial direction) is provided in the grooves Xg, Yg ( 5 (see FIG. 5 and FIG. 6).

  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 connecting portion 116a is electrically connected (welded) in a state of being pressed and contacted with the conducting wire connecting portion Mb in the conducting wire D. More specifically, the connecting portion 116a of the present embodiment has flexibility by extending radially outward, and is pressed against the conductor D (conductor connecting portion Mb) by the flexibility. The connecting portion 116a is electrically connected and fixed on the conducting wire connecting portion Mb in the conducting wire D and the placement portion Xd. Further, in the present embodiment, the conductive wire connecting portion Mb and the connecting portion 116a are stacked on the placement portion Xd in the axial direction, and more specifically, the connection portion 116a is disposed so as to sandwich the conductive wire connection portion Mb together with the placement portion Xd. Is done. The connecting portion 116a is disposed at a position corresponding to the concave portion Xh and the circumferential direction. Further, the connecting portion 116a of the present embodiment has an arc-shaped contact portion 116b (see FIGS. 7 and 9) substantially along the outer peripheral surface of the conducting wire D at the tip thereof, and the contact portion 116b (the arc-shaped configuration). The inner surface) of the lead wire D is pressed into contact with the lead wire D. Note that the arc-shaped inner surface of the contact portion 116b in the present embodiment is an arc shape having a diameter larger than the diameter of the conducting wire D, and is set to an arc shape smaller than 180 °. As a result, for example, even when the positions of the contact portion 116b and the conductive wire D are slightly shifted during the pressing contact, a favorable pressing contact is ensured (that is, the allowable contact range is increased). Further, in the present embodiment, when the commutator 108 is positioned with respect to the armature core 107 and when the commutator 108 is fixed by press-fitting to the rotating shaft 106 to which the armature core 107 is fixed. (When the commutator 108 is moved downward in the drawing as in FIGS. 8 to 9), the connecting portion 116 a is pressed into contact with the conducting wire D (leading wire connecting portion Mb) (pressing contact step). In this embodiment, the connection portion 116a and the conductive wire D (conductive wire connection portion Mb) are electrically connected by welding in this state (the state in which the pressing contact process is completed, see FIG. 9) ( Connection process). In addition, this connection part 116a is formed in the circumferential direction in every 24 short circuit pieces 116 (namely, eight pieces in total).

  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 wound around the teeth T1 to T8 of the armature core 107 and the crossover wires 110 connecting the plurality of windings M1 to M8 are continuously formed by the (continuous) conductor D. Therefore, the end portion (free end) of the conducting wire (for connecting to the commutator) becomes complicated (as in the prior art). And since the connection part 116a of the commutator 108 is electrically connected (welded in this Embodiment) in the state pressed by the conducting wire D (conductor connecting part Mb), it can perform a connection operation | work easily. it can. That is, there is no need to keep the connecting portion and the lead wire in close contact with each other (for example, with a device (jig) other than a welding jig) during the connection work, so there is room for the connection work space, Shortening can be achieved.

  (2) Since the connection portion 116a has flexibility and is pressed and brought into contact with the conductive wire D (conductive wire connection portion Mb) by the flexibility, for example, the connection portion 116a (commutator 108) and the conductive wire D (conductive wire D are connected to each other). Even if the positioning accuracy in the axial direction with respect to the armature core 107) to be supported varies, the variation is absorbed by the flexibility and can be brought into good pressing contact.

  (3) Since the connecting portion 116a is electrically connected to the conducting wire connecting portion Mb that is a part of the end winding Ma that is the final winding among the windings M1 to M8, the connecting wire D is connected to the predetermined portion. It is possible to achieve a stable state at the position. That is, the end winding Ma is less likely to move than the crossover wire 110 by being wound, and the conductor connecting portion Mb is easily held in a predetermined position, so that the connecting portion 116a can be easily connected to the conductor connecting portion Mb. It can be pressed and contacted, and the connection work can be performed more easily.

  (4) Since the connecting portion 116a is disposed so as to sandwich the conductor D (conductor connecting portion Mb) together with the insulator X (mounting portion Xd), the connecting portion 116a is securely and strongly pressed against the conductor connecting portion Mb. Thus, the connection work can be easily performed.

  (5) The connecting portion 116a has an arc-shaped contact portion 116b substantially along the outer peripheral surface of the conducting wire D, and the contacting portion 116b is pressed into contact with the conducting wire D (conducting wire connecting portion Mb). It is possible to prevent the lead wire connecting portion Mb from moving so as to escape with respect to 116 a, and a stable pressing contact can be achieved.

  (6) 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 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 located on the placement portion Xd. Is electrically connected. 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. As a result, connection work can be easily performed while preventing damage (short circuit) of the windings M1 to M8 (excluding the end winding Ma).

  (7) The conductor connecting portion Mb is electrically connected to the connecting portion 116a at one end side in the axial direction of the armature core 107 (the side where the commutator 108 is disposed), and the connecting wire 110 is connected to the armature core 107 in the axial direction or the like. It is arranged on the end side (the side opposite to the side where the commutator 108 is arranged). Therefore, it is possible to prevent the crossover wire 110 from interfering with the connection between the conductor connecting portion Mb and the connecting portion 116a. As a result, the connection work can be easily performed while preventing damage to the crossover wire 110.

  (8) Since the concave portion Xh extending radially outward is provided at a position corresponding to the connection portion 116a in the separation portion Xc, the separation portion Xc is obstructed and the connection work (for example, welding) is reduced. Is done. That is, since the entire separation portion Xc is not thinned in the radial direction, but the recess Xh is partially formed, the connection work can be easily performed while maintaining the rigidity of the entire separation portion Xc.

  (9) In the pressing contact process, the commutator 108 is positioned with respect to the armature core 107 (the commutator 108 is fixed by press-fitting to the rotating shaft 106 to which the armature core 107 is fixed. ), The connecting portion 116a is pressed into contact with the conducting wire D (the conducting wire connecting portion Mb). Then, after that, in the connecting step, the connecting portion 116a and the conductive wire D (conductive wire connecting portion Mb) are electrically connected by welding. If it does in this way, connection work can be performed easily. That is, since the connecting portion 116a is simultaneously pressed and contacted with the lead wire D (lead wire connecting portion Mb) in the originally essential step of positioning the commutator 108 with respect to the armature core 107, the connecting portion and the lead wire are connected during the connection work. Is not required to be held in close contact with each other, so that the connection work space can be afforded and the connection work time can be shortened.

The above embodiment may be modified as follows.
In the above embodiment, the connection portion 116a has flexibility and is pressed and brought into contact with the conductive wire D (conductive wire connection portion Mb) by the flexibility. However, the present invention is not limited to this. For example, FIG. As shown in FIG. 6, the conductive wire D (conductive wire connecting portion Mb) may be changed to a connecting portion 116c having a compressible (crushable) thickness (rigidity). In addition, the connection part 116c in this example has a plurality (a pair) of extension parts 116d in the circumferential direction of the commutator 108, and each of the extension parts 116d is pressed and brought into contact with the conductor D (conductor connection part Mb). . If it does in this way, since the connection part of the connection part 116c and the conducting wire D becomes multiple, the reliability of a connection can be improved. Also, in the connection portion 116c in this example, the extending portion 116d has an arc-shaped contact portion 116e substantially along the outer peripheral surface of the conductive wire D (conductive wire connection portion Mb), and the contact portion 116e is the conductive wire D. Is pressed against. Of course, a plurality of extending portions may be formed in the flexible connecting portion, and each extending portion may be pressed and brought into contact with the conductor, for example.

  In the above embodiment, the connecting portion 116a has the arc-shaped contact portion 116b substantially along the outer peripheral surface of the conducting wire D, and the contacting portion 116b is pressed against the conducting wire D (conducting wire connecting portion Mb). However, the present invention is not limited to this. For example, as shown in FIG. If it does in this way, the structure of the connection part 116f will become simple, and manufacture of a short circuit member and by extension, a commutator will become easy.

  In the above embodiment, the connecting portion 116a is arranged so as to sandwich the conductor connecting portion Mb together with the placement portion Xd of the insulator X. For example, as shown in FIG. When the connecting portion Mb) is stretched and is floating from the insulator X (mounting portion Xd), the connecting portion 116a may be pressed into contact with the floating conductor connecting portion Mb.

  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 portion Xd. However, the end winding is the first winding (first winding). ) May be changed. 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 part Xd.

  In the above embodiment, the crossover wire 110 is disposed on the other end side in the axial direction of the armature core 107 (the side opposite to the side on which the commutator 108 is disposed). May be arranged on one end side in the axial direction of the armature core 107 (side where the commutator 108 is arranged). In this case, the connecting portion (in place of the conducting wire connecting portion Mb) may be pressed and brought into contact with the connecting wire arranged on one end side in the axial direction and electrically connected (for example, welded) in that state. . Further, when the connecting wire is arranged on one end side in the axial direction of the armature core 107, the grooves Xg, Yg and the like need not be formed. Further, when the connecting portion is pressed and brought into contact with the connecting wire arranged on the one end side in the axial direction, the first or last winding (end winding Ma) of the windings M1 to M8 is arranged on the mounting portion Xd. There is no need.

  In the above embodiment, the concave portion Xh extending radially outward is provided at a position corresponding to the connecting portion 116a in the separation portion Xc. However, the present invention is not limited to this, and the concave portion Xh is not formed. The separation unit may be changed.

-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) The prior Symbol armature core, the winding a resin insulator interposed is mounted between, on the insulator, the arranged corresponding to each tooth portion and the end windings (one A separation part for separating the other windings from the other windings, and the connection part is electrically connected to the end windings (partial windings). The This prevents the windings (other windings) excluding the end windings from interfering with each other when the end windings (part of the windings) are connected to the connecting portion. Therefore, the connection work can be easily performed while preventing damage (short circuit) of the windings (excluding the end windings).

(B) pre-Symbol end windings (part of the winding), the connecting portion and are electrically connected with one axial end side which is the commutator side of the armature core, the crossover line, the electrical machine it characterized in that arranged on the other axial end side of the child core. If it does in this way, it will be prevented that a crossover becomes obstructive at the time of connection with an end winding (part winding) and a connection part. Therefore, it is possible to easily perform the connection work while preventing damage to the crossover wire.

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 schematic diagram for demonstrating the connection part in this Embodiment. The principal part expansion schematic diagram for demonstrating the connection part 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 schematic diagram for demonstrating the connection part in another example. The principal part expansion schematic diagram for demonstrating the connection part 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 116a, 116c, 116f ... connecting portion, 116b, 116e ... abutting portion, D ... conducting wire, M1-M8 ... winding, Ma ... end winding, Mb ... conducting wire connecting portion which is a part of the end winding, T1-T8 ... Teeth (teeth part), X ... Insulator.

Claims (6)

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;
E Bei a commutator having a connecting portion extending from a plurality of segments and said segments,
The connecting portion is an armature that is electrically connected in a state of being pressed and contacted with the conducting wire ,
The armature core is provided with a resin insulator interposed between the windings,
The armature , wherein the connecting portion is disposed so as to sandwich the conductor together with the insulator . 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;
A commutator having a plurality of segments and connections extending from the segments;
With
The connecting portion is an armature that is electrically connected in a state of being pressed and contacted with the conducting wire,
The said connection part has an arc-shaped contact part substantially along the outer peripheral surface of the said conducting wire, The contact part was press-contacted to the said conducting wire, The armature characterized by the above-mentioned. The armature according to claim 1 or 2 ,
The armature according to claim 1, wherein the connecting portion has flexibility, and is pressed into contact with the conductive wire by the flexibility. The armature according to any one of claims 1 to 3 ,
The armature, wherein the connecting portion is electrically connected to a part of an end winding which is the first or last winding among the windings. 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. 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;
A method of manufacturing an armature comprising a plurality of segments and a commutator having a connecting portion extending from the segments,
By performing positioning of the commutator with respect to the armature core, a pressing contact step of pressing and contacting the connection portion with the conductive wire;
A method for manufacturing an armature, comprising a connecting step of electrically connecting the connecting portion and the conductive wire after the pressing contact step.

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