JP2012196043A - Method for winding coil of dc motor and dc motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for winding a coil of a DC motor capable of reducing a total time taken for winding a coil on armature and connecting a connection line to lower a manufacturing cost, and a DC motor.SOLUTION: U-phase coils 71U and 72U are formed after shorting segments 14 corresponding to the U-phase coils 71U and 72U, V-phase coils 71V and 72V are formed after shorting segments 14 corresponding to the V-phase coils 71V and 72V, W-phase coils 71W and 72W are formed after shorting segments 14 corresponding to the W-phase coils 71W and 72W, X-phase coils 71X and 72X are formed after shorting segments 14 corresponding to the X-phase coils 71X and 72X, and Y-phase coils 71Y and 72Y are formed after shorting segments 14 corresponding to the Y-phase coils 71Y and 72Y, and a predetermined segment 14 and a predetermined teeth 9 around both of which a coil 12 is wound are opposite to each other with respect to a rotational axis 5 as a center in terms of a positional relationship thereof.

Description

  The present invention relates to a winding method for a DC motor, and a DC motor manufactured by using this method.

  As a DC motor, for example, there is one in which a plurality of permanent magnets are arranged on the inner peripheral surface of a bottomed cylindrical yoke, and an armature is rotatably provided radially inward of the permanent magnet. The armature includes an armature core that is externally fixed to a rotating shaft, and a commutator in which a plurality of segments are disposed. The armature core is provided with a plurality of teeth extending radially outward, and a plurality of axially long slots are formed between the teeth. The windings are inserted from these slots, and the windings are wound around the teeth by, for example, a distributed winding method. Thereby, an armature coil is formed on the outer periphery of the armature core.

  The winding is in conduction with the commutator segment. Each segment is in sliding contact with a brush for supplying power to the winding, and current is supplied to the winding through this brush. Further, when there are a plurality of segments having the same potential, the number of brushes installed can be reduced by short-circuiting the segments having the same potential with a connection line (equal pressure equalization line).

Here, based on FIG. 5, an example of the winding structure of the conventional coil | winding is demonstrated concretely.
FIG. 5 shows the armature 103 in the so-called 4-pole 10-slot 10-segment DC motor 101 having 4 poles (permanent magnet 104), 10 teeth 109 (slots 111) and 10 segments 114. 6 is a developed view of the teeth 109 and the segments 114 of the armature core 106 and the permanent magnet 104. FIG. The gap between adjacent teeth 109 corresponds to the slot 111.

As shown in the figure, the segments 114 having the same potential are short-circuited by a connection line 125. In other words, every fourth segment 14 facing each other around the rotation axis is short-circuited by the connection line 125.
The armature coil 107 formed on the outer periphery of the armature core 106 is formed by winding the winding 112 in a distributed winding manner so as to straddle the two adjacent teeth 109, 109, and the U phase and the V phase. , W phase, X phase, Y phase.

  In other words, for example, the first and second teeth 109 and 109 and the sixth and seventh teeth 109 and 109 are wound with a series of windings 112 to form a U-phase armature coil 107U. The winding start end 131 of the winding 112 forming the U-phase armature coil 107U exists in the vicinity of the drawing position of the winding start end 131 and is connected to the first segment 114 corresponding to the U-phase armature coil 107U. Is done. On the other hand, the winding end 132 is connected to the seventh segment 114 having the same potential as the second segment 114 adjacent to the first segment 114. The seventh segment 114 is located in the vicinity of the drawing position of the winding end end 132.

Hereinafter, the V-phase to Y-phase armature coils 107V to 107Y are also formed by winding the windings 112 around predetermined teeth 109, and the winding start ends 131 and winding end ends 132 of the respective windings 112 are pulled out. It is connected to a predetermined segment 114 located in the vicinity.
That is, the winding 112 is wound in series around the 2nd-3rd teeth 109, 109 and the 7th-8th teeth 109, 109 to form a V-phase armature coil 107V. The winding start end 131 of the winding 112 forming the V-phase armature coil 107V is connected to the second segment 114, while the winding end 132 has the same potential as the third segment 114 adjacent to the second segment 114. Is connected to the eighth segment 114.

  Further, a winding 112 is wound around the third to fourth teeth 109 and 109 and the eighth to ninth teeth 109 and 109 to form a W-phase armature coil 107W. The winding start end 131 of the winding 112 forming the W-phase armature coil 107W is connected to the third segment 114, while the winding end 132 is equal in potential to the fourth segment 114 adjacent to the third segment 114. Is connected to the No. 9 segment 114.

  Further, a winding 112 is wound around the 4th-5th teeth 109, 109 and the 9th-10th teeth 109, 109 in series to form an X-phase armature coil 107X. The winding start end 131 of the winding 112 forming the X-phase armature coil 107X is connected to the fourth segment 114, while the winding end 132 is the same potential as the fifth segment 114 adjacent to the fourth segment 114. Is connected to the 10th segment 114.

  Windings 112 are wound in series around Nos. 5-6 teeth 109, 109 and Nos. 10-1 teeth 109, 109 to form a Y-phase armature coil 107Y. The winding start end 131 of the winding 112 forming the Y-phase armature coil 107Y is connected to the fifth segment 114, while the winding end 132 has the same potential as the sixth segment 114 adjacent to the fifth segment 114. Is connected to the first segment 114.

  Under such a configuration, two brushes 121, 121 are arranged around the segment 114 at an interval of 90 degrees in the circumferential direction. When a current is supplied from the brush 121 to the winding 112 via the segment 114, a magnetic field is formed in the armature core 106. The armature 103 rotates by a magnetic attractive force or repulsive force generated between the magnetic field and the permanent magnet 104 (see, for example, Patent Document 1).

JP 2005-33843 A

By the way, in the winding structure of the winding in the above-mentioned prior art, it is excellent in that the mechanical weight balance can be taken, but the electrical balance is bad.
More specifically, a description will be given based on FIG.
FIG. 6 is an explanatory diagram showing a connection state between the segment 114 of FIG. 5 and the armature coils 107U to 107Y of each phase.
As shown in FIGS. 5 and 6, in the above-described prior art, the U-phase and Y-phase two-phase armature coils 107 </ b> U and 107 </ b> Y are connected to the first segment 114, and the armature coil is connected to the sixth segment 114. 107 is not connected. For this reason, the sixth segment 114 is connected only to the first segment 114 via the connection line 125.

  In such a state, the brush 121 on the anode side of the two brushes 121 and 121 is in sliding contact with the 6th segment 114, while the brush 121 on the cathode side is slid between the 8th and 9th segments 114 and 114. If it contacts, the electric current value of the connection line 125 which short-circuits between the 6th-1st segments 114 and 114 will be doubled compared with another connection location. As described above, the overcurrent is supplied to the winding 112 depending on the sliding contact position of the brush 121, and there is a problem that the heat generation of the DC motor 101 increases.

  Therefore, the present invention has been made in view of the above-described circumstances, and provides a winding method for a 4-pole 10-slot 10-segment DC motor with excellent electrical balance, and a DC motor. is there.

  In order to solve the above-described problems, the invention described in claim 1 is a yoke having four magnetic poles, a rotary shaft rotatably supported by the yoke, and an armature core provided on the rotary shaft. And a commutator provided adjacent to the armature core on the rotating shaft, and the armature core includes ten teeth extending radially in the radial direction and ten slots formed between the teeth. Each tooth is wound in a distributed winding manner so as to straddle two adjacent teeth, and a coil having a U-phase, V-phase, W-phase, X-phase, and Y-phase. The coils formed at the positions facing each other around the rotation axis are in-phase coils, and the in-phase coils are formed in series, and the commutator is provided for each phase. A total of 10 segments are arranged along the circumferential direction so that two corresponding segments of the same potential are arranged opposite to each other about the rotation axis, and the segments of the same potential are short-circuited by the windings. A winding method for a 4-pole 10-slot 10-segment DC motor, wherein a coil having a 5-phase structure of U phase, V phase, W phase, X phase, and Y phase is provided on the teeth of the armature core. In this case, the winding start end of the U-phase coil is connected to a segment adjacent to the segment to which the winding end of the U-phase coil is connected, or the winding of the Y-phase coil is connected. The end is connected to a segment adjacent to the segment to which the winding start end of the Y-phase coil is connected, and the V-phase, W-phase, and X-phase coils have their respective winding start ends and winding ends. End, the same as the potential difference between two adjacent segments, are arranged on both sides and around the said rotation axis, characterized in that it is connected to the two segments corresponding to each phase.

  By adopting such a winding method, it is possible to prevent a segment to which no coil is connected from existing.

  In the invention described in claim 2, each segment is sequentially numbered from No. 1 to No. 10 in the circumferential direction, and the No. 1 segment and No. 6 segment are set as the same potential segment. Set the 7th segment to the same potential, set the 3rd and 8th segments to the same potential, set the 4th and 9th segments to the same potential, and set the 5th and 10th segments to the same potential. When the same potential is set, the winding start end of the winding is connected to the 6th segment, the winding is connected to the 1st segment, and then the windings are connected to the four teeth corresponding to the U phase. After that, the windings are connected in the order of the 7th segment and the 2nd segment, and then the windings are wound around the four teeth corresponding to the V phase. Previous segment, segment 3 After connecting the windings, the windings are wound around the four teeth corresponding to the W phase, and then the windings are connected in the order of the 9th segment and the 4th segment. The windings are wound around four teeth corresponding to the X phase, and then the windings are connected in the order of the 10th segment and the 5th segment, and then the four teeth corresponding to the Y phase are connected to the 4 teeth. The winding is wound, and finally, the winding end of the winding is connected to the 6th segment.

  By setting it as such a winding method, the winding operation | work to the armature core and the connection operation | work of the winding to a segment can be performed in series. In other words, the winding operation for winding the armature core and the connecting operation for connecting the winding to the segment can be performed continuously in the manner of a single stroke.

  The invention described in claim 3 is characterized in that the positional relationship between the predetermined segment spanned by the winding and the predetermined tooth is a positional relationship facing the rotation axis as a center.

  By adopting such a winding winding method, it is possible to route the winding so that the winding under the neck of the commutator is applied to the rotating shaft.

  According to a fourth aspect of the present invention, there is provided the armature core in which the winding is wound using the winding method for a DC motor according to any one of the first to third aspects, and the commutator. A direct current motor is provided.

  By adopting such a configuration, it is possible to provide a 4-pole 10-slot 10-segment DC motor with excellent electrical balance.

  According to the first aspect of the present invention, there can be no segment to which the coil is not connected. For this reason, the electrical balance of the winding structure is improved, and overcurrent is supplied to some windings depending on the position of the brush that is in sliding contact with the segment, thereby preventing the generation of heat.

  According to the second aspect of the present invention, the winding operation for winding the armature core and the connecting operation for winding the winding to the segment can be performed in series. In other words, the winding operation for winding the armature core and the connecting operation for connecting the winding to the segment can be performed continuously in the manner of a single stroke. For this reason, the total time of the winding time of the coil to an armature and the connection time of the connection line to a segment can be shortened, and manufacturing cost can be reduced.

  According to the invention described in claim 3, it is possible to route the winding so that the winding under the neck of the commutator is applied to the rotating shaft. For this reason, it can prevent that the winding under the neck of a commutator loosens toward the radial direction outer side, and can reduce the winding thickness by winding.

  According to the fourth aspect of the present invention, it is possible to provide a 4-pole 10-slot 10-segment DC motor excellent in electrical balance.

It is a longitudinal section of a direct-current motor in an embodiment of the present invention. It is an expanded view of the armature in 1st Embodiment of this invention. It is explanatory drawing which shows the connection state of the segment of FIG. 2, and the coil of each phase. It is an expanded view of the armature in 2nd Embodiment of this invention. It is a development view of a conventional armature. It is explanatory drawing which shows the connection state of the segment of FIG. 5, and the armature coil of each phase.

(First embodiment)
(DC motor)
Next, a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a longitudinal sectional view of a DC motor.
As shown in the figure, a DC motor 1 is a drive source for electrical components mounted on a vehicle, and has a configuration in which an armature 3 is rotatably arranged in a bottomed cylindrical yoke 2. . Four permanent magnets 4 are arranged on the inner peripheral surface of the yoke 2 in the circumferential direction so that the magnetic poles are in order. As a result, the DC motor 1 is in a state where four poles are formed in the yoke 2.

  The armature 3 includes an armature core 6 that is externally fixed to the rotary shaft 5, an armature coil 7 that is wound around the armature core 6, and a commutator (commutator) 13 that is disposed on one end side of the armature core 6. Has been. The armature core 6 is obtained by laminating a plurality of ring-shaped metal plates 8 in the axial direction. Ten T-shaped teeth 9 in a plan view in the axial direction are formed on the outer peripheral portion of the metal plate 8 at regular intervals and radially along the circumferential direction.

By fitting a plurality of metal plates 8 to the rotating shaft 5, dovetail-shaped slots 11 are formed between adjacent teeth 9 on the outer periphery of the armature core 6. Ten slots 11 extend along the axial direction, and are formed at equal intervals along the circumferential direction.
An enamel-wrapped winding 12 is wound between the slots 11, whereby a plurality of armature coils 7 are formed on the outer periphery of the armature core 6.

  The commutator 13 is externally fitted and fixed to one end of the rotating shaft 5. Ten segments 14 made of a conductive material are attached to the outer peripheral surface of the commutator 13. The segments 14 are made of plate-like metal pieces that are long in the axial direction, and are fixed in parallel at equal intervals along the circumferential direction in a state of being insulated from each other. A riser 15 is integrally formed at an end portion of each segment 14 on the armature core 6 side and is bent in a manner of being folded back to the outer diameter side. The riser 15 is wound around the winding start end 31 and the winding end end 32 (see FIG. 2) of the winding 12 that forms the armature coil 7 and a connection line (equal pressure equalization line) 25, which will be described later. Is fixed to the riser 15. Thereby, the segment 14, the armature coil 7 corresponding to this, and the connection line 25 are electrically connected.

  The other end of the rotary shaft 5 is rotatably supported by a bearing 16 in a boss that is formed to protrude from the yoke 2. A cover 17 is provided at the open end of the yoke 2, and a holder stay 18 is attached to the inside of the cover 17. The holder stay 18 is provided with two brush holders 19 at a predetermined angle (90 degrees in the present embodiment) in the circumferential direction.

  Each brush holder 19 includes a brush 21 that can be moved in and out in a state where the brush 21 is urged through a spring S. The tip portions of the brushes 21 are urged by the spring S and are in sliding contact with the commutator 13, so that power from the outside is supplied to the commutator 13 through the brushes 21.

(Wound winding method)
FIG. 2 is a developed view of the segment 14 (riser 15) of the armature 3, the teeth 9, and the permanent magnet 4 disposed on the yoke 2 side. The gap between the adjacent teeth 9 corresponds to the slot 11. (The same applies to the following drawings). In the following drawings, each segment 14 and each tooth 9 are numbered in order along the rotation direction, and the wound winding 12 is denoted by a reference numeral. In FIG. 2, the rotation direction of the armature 3 (hereinafter simply referred to as the rotation direction) is the right direction.

  Here, the armature coil 7 formed on the outer periphery of the armature core 6 is formed by winding the winding 12 in a distributed winding manner so as to straddle the two adjacent teeth 9, 9. It has a five-phase structure of phase, W phase, X phase, and Y phase. And the armature coil 7 of each phase is formed in two places so that it may respectively oppose centering on the rotating shaft 5. As shown in FIG. That is, the armature coil 7 includes a first U-phase coil 71U, a second U-phase coil 72U, a first V-phase coil 71V, a second V-phase coil 72V, a first W-phase coil 71W, a second W-phase coil 72W, a first X-phase coil 71X, It is composed of a 2X phase coil 72X, a first Y phase coil 71Y, and a second Y phase coil 72Y.

Further, the segments 14 having the same potential, that is, the two segments 14 facing each other around the rotation shaft 5 are short-circuited by the connection line 25.
The armature coil 7 and the connection line 25 having such a configuration are formed by winding the winding 12 in series. More specific description will be given below.

  As shown in FIG. 2, first, for example, when the winding start end 31 of the winding 12 is wound around the riser 15 of the sixth segment 14, the first segment 14 having the same potential as that of the sixth segment 14 is subsequently generated. The winding 12 is wound around the riser 15. And the connection line 25 which short-circuits the 6th segment 14 and the 1st segment 14 is formed.

  Next, the winding 12 is drawn into the slot 11 between the 10th and 1st teeth 9 and 9 existing in the vicinity of the 1st segment 14. Winding between the slot 11 between the 10th and 1st teeth 9 and 9 and the slot 11 between the 2nd and 3rd teeth 9 and 9 existing by skipping one slot 11 forward in the rotational direction from here. The wire 12 is wound N times (N is a natural number) to form a first U-phase coil 71U.

  The winding wire 12 forming the first U-phase coil 71U is pulled out from the slot 11 between the 2nd and 3rd teeth 9 and 9, and routed in the rotational direction, and then the 5th and 6th teeth 9 and 9 are arranged. It is drawn into the slot 11 between. Then, winding is performed between the slot 11 between the 5th and 6th teeth 9 and 9 and the slot 11 between the 7th and 8th teeth 9 and 9 that are present by skipping one slot 11 forward in the rotational direction. The wire 12 is wound N times to form the second U-phase coil 72U.

  Subsequently, the winding 12 is pulled out from the slot 11 between the 7th and 8th teeth 9 and 9, is present in the vicinity of the slot 11, and the riser 15 of the 7th segment 14 adjacent to the 6th segment 14. It is hung around. Further, the winding 12 is wound around the riser 15 of the second segment 14 having the same potential as the seventh segment 14. Thereby, the connection line 25 which short-circuits the 7th segment 14 and the 2nd segment 14 is formed.

  Next, the winding 12 is drawn into the slot 11 between the first and second teeth 9 and 9 existing in the vicinity of the second segment 14, and the slot 11 between the first and second teeth 9 and 9, The winding 12 is wound N times between the slot 11 between the third and fourth teeth 9 and 9 that are present by skipping one slot 11 forward in the rotation direction, thereby forming the first V-phase coil 71V. .

  The winding wire 12 forming the first V-phase coil 71V is pulled out from the slot 11 between the third and fourth teeth 9 and 9, and routed in the rotational direction, and then the sixth and seventh teeth 9,9. It is drawn into the slot 11 between. And it winds between the slot 11 between the 6th-7th teeth 9 and 9 and the slot 11 between the 8th-9th teeth 9 and 9 that exists by skipping one slot 11 forward in the rotational direction from here. The wire 12 is wound N times to form the second V-phase coil 72V.

  Subsequently, the winding 12 is pulled out from the slot 11 between the 8th and 9th teeth 9 and 9, is present in the vicinity of the slot 11, and the riser 15 of the 8th segment 14 adjacent to the 7th segment 14. It is hung around. Further, the winding 12 is wound around the riser 15 of the third segment 14 having the same potential as the eighth segment 14. Thereby, the connection line 25 which short-circuits the 8th segment 14 and the 3rd segment 14 is formed.

  Thereafter, in the same procedure as when the first U-phase coil 71U to the second V-phase coil 72V are formed, between the slot 11 between the 2nd and 3rd teeth 9 and 9 and between the 4th and 5th teeth 9 and 9 A first W-phase coil 71 </ b> W is formed between the slot 11 and the second W-phase between the slot 11 between the seventh and eighth teeth 9 and 9 and the slot 11 between the ninth and tenth teeth 9 and 9. A coil 72W is formed.

Further, the winding 12 is again wound around the riser 15 of the corresponding segment 14, and then the winding 12 is wound around the segment 14 having the same potential. And the connection line 25 which short-circuits between the segments 14 used as the same electric potential is formed. Thereafter, the winding 12 is again drawn out to the armature core 6 side, and the first X-phase coil 71X and the second X-phase coil 72X are formed between the predetermined slots 11.
Subsequently, the winding 12 is again wound around the riser 15 of the corresponding segment 14, and the winding 12 is further wound around the segment 14 having the same potential to form the connection line 25. Then, the winding 12 is again drawn out to the armature core 6 side, and the first Y-phase coil 71Y and the second Y-phase coil 72Y are formed between the predetermined slots 11.

Here, the winding wire 12 forming the second Y-phase coil 72 </ b> Y is drawn from the slot 11 between the first and second teeth 9 and 9, but is present in the vicinity of the slot 11 and adjacent to the tenth segment 14. It is not hung around the riser 15 of the matching first segment 14.
That is, the winding end 32 of the winding 12 drawn out from the slot 11 between the first and second teeth 9 and 9 is routed in the rotation direction, and the sixth segment 14 having the same potential as the first segment 14. Is connected to the riser 15. Thereby, formation of the armature coil 7 wound around the armature core 6 is completed.

  In this way, the winding 12 is arranged so as to repeatedly move between the segment 14 and the armature core 6 in the manner of a single stroke, thereby forming the armature coil 7 and the connection line 25 in series.

  When the winding 12 is routed from the segment 14 toward the armature core 6, the riser 15 of the segment 14 from which the winding 12 is drawn and the slot 11 into which the winding 12 is drawn are centered on the rotary shaft 5. It exists in the almost opposite position. Similarly, when the winding 12 is routed from the armature core 6 toward the segment 14, the slot 11 from which the winding 12 is drawn and the riser 15 of the segment 14 around which the winding 12 is wound are centered on the rotating shaft 5. Exist at almost opposite positions. For this reason, the winding 12 that is routed between the commutator 13 and the armature core 6, that is, the winding 12 that is routed under the neck of the commutator 13, is slightly hung on the rotating shaft 5.

Further, the winding 12 wound as shown in FIG. 2 is in a state where the armature coil 7 and the connection line 25 are connected to each segment 14 as shown in FIG.
FIG. 3 is an explanatory diagram showing a connection state between the segment 14 of FIG. 2 and the coils 71U to 72Y of the respective phases.
That is, as shown in the figure, to each segment 14, one end of a corresponding phase coil 71 </ b> U to 72 </ b> Y is connected, and one end of a connection line 25 is connected.

Under such a configuration, when a current is sequentially supplied to each of the coils 71 </ b> U to 72 </ b> Y via the brush 21, a magnetic field is sequentially generated at a predetermined position of the armature core 6. Then, a repulsive force and an attractive force are generated between the permanent magnet 4 provided on the yoke 2 and the armature 3 rotates.
At this time, one end of the corresponding phase coil 71U to 72Y is connected to each segment 14, and one end of the connection line 25 is connected. No overcurrent is supplied to 12.

(effect)
Therefore, according to the first embodiment described above, when forming the armature core 6 from the first U-phase coil 71U to the second Y-phase coil 72Y in order, the U-phase, V-phase, W-phase, and X-phase coils 71U to 72X. The terminals are connected between the segments 14 and 14 located on both sides of the rotation axis 5, while the Y-phase coils 71Y and 72Y are formed in the second Y By connecting the winding end 32 of the phase coil 72Y to the 6th segment 14 adjacent to the 5th segment 14 to which the winding start end of the Y phase coil 71Y is connected, One end of each of the coils 71U to 72Y can be connected and one end of the connection line 25 can be connected (see FIG. 3). For this reason, the electrical balance of the winding structure is improved, the overcurrent is not supplied to the winding 12 regardless of the position of the brush 21, and the promotion of heat generation of the DC motor 1 can be prevented.

  In forming the armature coil 7 and the connection line 25, the armature coil 7 and the connection line 25 can be formed in series by arranging the winding 12 so as to repeatedly move in the manner of one stroke. Therefore, the total time of the winding time of the winding 12 around the armature core 6 and the formation time of the connection line 25 between the segments 14 can be shortened. As a result, the manufacturing cost of the DC motor 1 can be reduced.

(Second Embodiment)
Next, a second embodiment of the present invention will be described based on FIG. 4 with reference to FIG.
FIG. 4 is a developed view of the segment 14 (riser 15) and teeth 9 of the armature 3 and the permanent magnet 4 disposed on the yoke 2 side in the second embodiment. In addition, the same code | symbol is attached | subjected and demonstrated to the same aspect as 1st Embodiment.
In this second embodiment, the DC motor 1 is a motor having four permanent magnets 4, ten slots 11, and ten segments 14, and the armature coil 7 formed on the outer periphery of the armature core 6 is The winding 12 is wound in a distributed winding manner so as to straddle two adjacent teeth 9, 9 and has a five-phase structure of U phase, V phase, W phase, X phase, and Y phase. The armature coils 7 of each phase are formed at two locations so as to face each other about the rotation axis 5, and the segments 14 having the same potential, that is, the rotation axis 5 is the center. The two segments 14 facing each other have the same basic configuration as the first embodiment described above, such as being short-circuited by the connection line 25 (the same applies to the following embodiments).

  Here, the difference between the first embodiment described above and the second embodiment is that the routing path of the winding 12 between each segment 14 and the armature core 6 is different. More specific description will be given below.

(Wound winding method)
As shown in FIG. 4, first, for example, when the winding start end 31 of the winding 12 is wound around the riser 15 of the 6th segment 14, The winding 12 is wound around the riser 15. And the connection line 25 which short-circuits the 6th segment 14 and the 1st segment 14 is formed.

  Next, the winding 12 is drawn into the slot 11 between the 7th and 8th teeth 9 and 9 that are located substantially opposite to the first segment 14 around the rotation axis 5. A slot 11 between the 7th and 8th teeth 9 and 9 and a slot 11 between the 5th and 6th teeth 9 and 9 that are present by skipping one slot 11 on the opposite side to the rotation direction from here. Winding 12 is wound N times in between, forming first U-phase coil 71U.

  The winding wire 12 forming the first U-phase coil 71U is drawn out from the slot 11 between the 5th and 6th teeth 9 and 9, and after being routed in the rotational direction, the 2nd and 3rd teeth 9 and 9 It is drawn into the slot 11 between. A slot 11 between No. 2 and No. 3 teeth 9 and 9 and a slot 11 between No. 10 and No. 1 teeth 9 and 9 existing by skipping one slot 11 opposite to the rotation direction from here. Winding 12 is wound N times in the middle to form second U-phase coil 72U.

  Subsequently, the winding 12 is pulled out from the slot 11 between the 10th and 1st teeth 9 and 9, and is present at a position substantially opposite to the slot 11 around the rotation shaft 5, and the 6th segment 14 Is hung around the riser 15 of the seventh segment 14 adjacent to the second segment 14. Further, the winding 12 is wound around the riser 15 of the second segment 14 having the same potential as the seventh segment 14. Thereby, the connection line 25 which short-circuits the 7th segment 14 and the 2nd segment 14 is formed.

  Next, the winding 12 is drawn into the slot 11 between the Nos. 8-9 teeth 9 and 9 that are located substantially opposite to the No. 2 segment 14 around the rotating shaft 5, and Nos. 8-9. The winding 12 is N between the slot 11 between the teeth 9 and 9 and the slot 11 between the 6th and 7th teeth 9 and 9 that is present by skipping one slot 11 opposite to the rotation direction from here. The first V-phase coil 71V is formed by winding.

  The winding wire 12 forming the first V-phase coil 71V is pulled out from the slot 11 between the 6th and 7th teeth 9 and 9 and routed in the rotational direction, and then the 3rd and 4th teeth 9 and 9 are placed. It is drawn into the slot 11 between. A slot 11 between the third and fourth teeth 9 and 9 and a slot 11 between the first and second teeth 9 and 9 that are present by skipping one slot 11 opposite to the rotation direction from here. Winding 12 is wound N times in the middle to form second V-phase coil 72V.

  Subsequently, the winding 12 is pulled out from the slot 11 between the first and second teeth 9, 9, and is present at a position substantially opposite to the slot 11 around the rotation shaft 5, and the seventh segment 14 Is hung around the riser 15 of the eighth segment 14 adjacent to. Further, the winding 12 is wound around the riser 15 of the third segment 14 having the same potential as the eighth segment 14. Thereby, the connection line 25 which short-circuits the 8th segment 14 and the 3rd segment 14 is formed.

  Thereafter, in the same procedure as when the first U-phase coil 71U to the second V-phase coil 72V are formed, the slot 11 between the 9th and 10th teeth 9, 9 and the space between the 7th and 8th teeth 9, 9 are used. A first W-phase coil 71 </ b> W is formed between the slot 11 and the second W-phase between the slot 11 between the fourth and fifth teeth 9 and 9 and the slot 11 between the second and third teeth 9 and 9. A coil 72W is formed.

  Further, the winding 12 is again wound around the riser 15 of the corresponding segment 14, and then the winding 12 is wound around the segment 14 having the same potential. And the connection line 25 which short-circuits between the segments 14 used as the same electric potential is formed. Thereafter, the winding 12 is again drawn out to the armature core 6 side, and the first X-phase coil 71X and the second X-phase coil 72X are formed between the predetermined slots 11.

  Subsequently, the winding 12 is again wound around the riser 15 of the corresponding segment 14, and the winding 12 is further wound around the segment 14 having the same potential to form the connection line 25. Then, the winding 12 is again drawn out to the armature core 6 side, and the first Y-phase coil 71Y and the second Y-phase coil 72Y are formed between the predetermined slots 11.

Here, the winding wire 12 forming the second Y-phase coil 72 </ b> Y is drawn out from the slot 11 between the 4th and 5th teeth 9 and 9, and the slot 11 is substantially opposed to the rotation axis 5. And is not wound around the riser 15 of the first segment 14 adjacent to the tenth segment 14.
That is, the winding end 32 of the winding 12 drawn out from the slot 11 between the 4th and 5th teeth 9 and 9 exists in the vicinity of the slot 11 and has the same potential as the 1st segment 14. 14 risers 15 are connected to each other. Further, at this time, the winding 12 is pulled out from the slot 11 between the 4th and 5th teeth 9 and 9, and is not directly routed to the 6th segment 14, but once around the rotary shaft 5 in the rotational direction. Routed towards. Then, after winding the winding 12 around the rotating shaft 5, the winding 12 is connected to the sixth segment 14. Thereby, formation of the armature coil 7 wound around the armature core 6 is completed.

(effect)
Therefore, according to the second embodiment described above, the same effects as those of the first embodiment described above can be achieved.
When the winding 12 is routed from the segment 14 toward the armature core 6, the riser 15 of the segment 14 from which the winding 12 is drawn and the slot 11 into which the winding 12 is drawn are centered on the rotary shaft 5. It exists in the almost opposite position. Similarly, when the winding 12 is routed from the armature core 6 toward the segment 14, the slot 11 from which the winding 12 is drawn and the riser 15 of the segment 14 around which the winding 12 is wound are centered on the rotating shaft 5. Exist at almost opposite positions. For this reason, the winding 12 that is routed between the commutator 13 and the armature core 6, that is, the winding 12 that is routed under the neck of the commutator 13, is slightly hung on the rotating shaft 5. Therefore, it is possible to prevent the winding 12 under the neck of the commutator 13 from becoming loose toward the outside in the radial direction, and to reduce the winding of the winding 12 under the neck of the commutator 13.

The present invention is not limited to the above-described embodiment, and includes various modifications made to the above-described embodiment without departing from the spirit of the present invention.
For example, in the above-described embodiment, the case where the two brush holders 19 are provided on the holder stay 18 and the two brushes 21 and 21 are in sliding contact with the segment 14 has been described. However, the present invention is not limited to this, and the number of brushes 21 can be increased to four, which is the same number as the number of poles.

  In the first and second embodiments described above, the case where the armature coil 7 and the connection line 25 are formed in series by moving the winding 12 in the manner of one-stroke writing has been described. However, the present invention is not limited to this, and the armature coil 7 and the connection line 25 may be formed by separate windings 12.

Furthermore, in the first embodiment and the second embodiment described above, after the second Y-phase coil 72Y is formed, the winding end 32 of the winding 12 is not the first segment 14, but the Y-phase coils 71Y and 72Y. The case where it is connected to the sixth segment 14 adjacent to the fifth segment 14 to which the winding start end is connected has been described.
However, when the armature coil 7 and the connection line 25 are formed by separate windings 12, after the second Y-phase coil 72Y is formed, the winding end 32 of the winding 12 is connected to the first segment 14. The winding start ends of the U-phase coils 71U and 72U, that is, the winding start ends of the first U-phase coil 71U, the winding end ends of the U-phase coils 71U and 72U, that is, the winding end ends of the second U-phase coil 72U. You may comprise so that it may connect to the 6th segment 14 adjacent to the 7th segment 14 connected. Even when configured in this way, the same effects as those of the first embodiment described above can be obtained.

1 DC motor 2 Yoke 3 Armature 4 Permanent magnet (magnetic pole)
5 Rotating shaft 6 Armature core 7 Armature coil (coil)
9 Teeth 11 Slot 12 Winding 13 Commutator 14 Segment 25 Connection line 71U 1st U phase coil 72U 2nd U phase coil 71V 1st V phase coil 72V 2nd V phase coil 71W 1st W phase coil 72W 2nd W phase coil 71X 1st X phase coil 72X Second X-phase coil 71Y First Y-phase coil 72Y Second Y-phase coil

Claims (4)

A yoke having four poles;
A rotating shaft rotatably supported by the yoke;
An armature core provided on the rotating shaft;
A commutator provided adjacent to the armature core on the rotating shaft;
The armature core has ten teeth extending radially in the radial direction and ten slots formed between the teeth, and each tooth spans two adjacent teeth. The windings are wound by the distributed winding method to form a coil having a five-phase structure of U phase, V phase, W phase, X phase, and Y phase, and formed at positions facing each other around the rotation axis. The coils are in-phase coils, and these in-phase coils are formed in series.
The commutator has a total of ten segments arranged along the circumferential direction so that two segments of the same potential corresponding to each phase are opposed to each other around the rotation axis. Is a winding method of a 4-pole 10-slot 10-segment DC motor that is short-circuited by the winding,
A coil having a U-phase, V-phase, W-phase, X-phase, and Y-phase structure is sequentially formed on the teeth of the armature core, and at this time, the winding start end of the U-phase coil is connected to the U-phase. The winding end of the Y phase coil is connected to a segment adjacent to the connected segment, or the winding end of the Y phase coil is adjacent to the segment to which the winding start end of the Y phase coil is connected. Connected to the segment
The V-phase, W-phase, and X-phase coils have winding start ends and winding end ends that are the same as the potential difference between two adjacent segments, and are arranged on both sides around the rotation axis. A winding method for winding a DC motor, wherein the winding is connected to two segments corresponding to each phase. Each segment is numbered from 1 to 10 in the circumferential direction in order, set segment 1 and segment 6 to the same potential, and set segment 2 and segment 7 to the same potential. When the 3rd and 8th segments are set to the same potential, the 4th and 9th segments are set to the same potential, and the 5th and 10th segments are set to the same potential,
After connecting the winding start end of the winding to the No. 6 segment, connecting the winding to the No. 1 segment, and then winding the winding around the four teeth corresponding to the U phase. The 7th segment, the 2nd segment are connected in this order, and then the winding is wound around the 4 teeth corresponding to the V phase, and then the 8th segment, the 3rd segment. The winding is connected, and then the winding is wound around the four teeth corresponding to the W phase, and then the winding is connected in the order of the 9th segment and the 4th segment. The windings are wound around the four teeth corresponding to the X phase, and then the windings are connected in the order of the 10th segment and the 5th segment, and then the four teeth corresponding to the Y phase are connected. Winding the winding, and finally, the winding end of the winding Winding wound method of the DC motor according to claim 1, characterized in that connecting to the turn segment.   The positional relationship between a predetermined segment and a predetermined tooth on which the winding is spanned is a positional relationship that faces the rotation axis as a center. DC motor winding method.   A DC motor comprising: the armature core on which the winding is wound using the winding method for a DC motor according to any one of claims 1 to 3; and the commutator. .

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