JP2014103712A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent second and succeeding wires from being disordered under influence of a lead-out wire.SOLUTION: A stator 4 includes a cylindrical yoke part 6, a rectangularly-sectioned teeth part 7 which projects radially from the yoke part 6, a restriction wall part 15 which projects axially from the yoke part 6 and is provided with a wire lead-out part 17, and a coil 8 which has a wire 14 arrayed and wound while positioned by the wire lead-out part 17. Peripheral surfaces 6a of the yoke part 6 on both sides of the teeth part 7 are shifted radially in position when the axial direction is viewed from the side where the wire 14 is led out, and then a first edge part 21 where the wire begins to be wound between two edge parts 20 of the teeth part 7 extending radially is longer than a fourth edge part 24 where the wire puts and end to winding.

Description

  The present invention relates to a winding structure of an aligned winding motor.

  Generally, a motor is provided with a stator that generates a magnetic force by electrical control in order to rotate the rotor. A plurality of teeth portions are radially arranged on the stator, and a plurality of coils are provided on the stator by winding a wire around these teeth portions. Generally, a stator is configured by covering a magnetic core with an insulating insulator, and a wire is wound around the core via the insulator.

  One method of winding the wire is concentrated winding. In concentrated winding, a coil is formed by repeatedly winding a wire around each of the teeth.

  In order to improve the performance of the motor, it is important to improve the space factor of the wire. That is, the wire is wound so that a gap is not left as much as possible in a space (slot) between adjacent teeth portions. By doing so, it becomes possible to generate a strong magnetic force and to obtain a motor with higher output.

  Therefore, when winding the wire around the teeth portion by concentrated winding, aligned winding is usually performed. That is, the wire is wound in layers while being wound around the teeth portion so as to be parallel with no gap. In order to guide the winding position of the first layer wire, in many motors, an uneven guide is formed on the surface of the tooth portion.

  When performing aligned winding, there is a tendency that wire disturbance tends to occur particularly at the beginning of winding. Therefore, various attempts have been made so far in order to prevent the wire from being disturbed.

  For example, in Patent Document 1, no guide is provided and positioning is not performed from the first winding to a certain number of windings in order to prevent the first winding of the winding start side wire from riding on the second winding. It is disclosed to do so.

  Patent Document 2 discloses that a guide protrusion is formed on the insulator and guides the replacement of the first-layer winding by the guide protrusion.

JP 2002-284446 A JP 2006-115565 A

  FIG. 1 shows a main part of a conventional winding structure using aligned winding. In the figure, 101 is a teeth portion, 102 is a core, 103 is an insulator, and 104 is a wire. An outer wall portion 105 of an insulator 103 that extends in the circumferential direction is provided at the proximal end portion of the tooth portion 101. At the base end portion of the tooth portion 101 of the outer wall portion 105, a lead groove 106 is formed along the edge of the tooth portion 101, and the wire 104 connected to another coil is drawn to the tooth portion 101 side through the lead groove 106. ing.

  The wire 104 drawn out from the lead-out groove 106 is wound around the tooth portion 101 in parallel toward the tip end while being guided by the guide 107, thereby forming the first layer of the coil. Thereafter, the second layer of the coil is formed by folding back from the tip end side of the tooth portion 101 and overlapping the first layer of the coil and winding the wire 104 in parallel.

  FIG. 2 shows a part of the second layer of the coil. Each wire 104 forming the second layer is guided in a recess of two adjacent wires 104, 104 of the first layer and wound in parallel. However, when the wire 104 comes to a portion where the winding start side end (leader line 104a) is present, the leader line 104a becomes an obstacle and disturbs the aligned winding.

  Specifically, the lead wire 104a protrudes upward from the other wires 104 forming the first layer and is often lifted from the tooth portion 101, so that the wire 104 contacts the lead wire 104a. Will be pushed outward. When the disturbance of the second layer occurs, the disturbance also affects the arrangement of the wires 104 of the outermost layer, and the surface of the coil becomes uneven. When the surface of the coil becomes uneven, a gap is generated in the slot, and the space factor is lowered.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a motor that can effectively prevent turbulence in the second and subsequent layers caused by the influence of the leader line.

  The motor according to the present invention includes a motor case, a rotor that is rotatably supported by the motor case, and a stator that is fixed to the motor case. The stator includes a cylindrical yoke portion arranged so that its center coincides with the axis of the rotor, a teeth portion having a rectangular cross section protruding radially from the peripheral surface of the yoke portion, and arranged radially. A restriction wall portion protruding in an axial direction from an end surface of the yoke portion and provided with a wire drawing portion for each tooth portion, and a wire drawn in a state positioned by the wire drawing portion are connected to the base end side of the teeth portion. And a plurality of coils formed in layers by being wound in an aligned state.

  Then, when the axial direction is viewed from the side from which the wire is drawn, the peripheral surfaces of the yoke portions located on both sides of the teeth portion are displaced in the radial direction, so that 2 of the teeth portion extending in the radial direction is obtained. Of the two edges, the first edge where the wire starts to be wound is longer than the fourth edge where the wire ends.

  According to this motor, the first edge portion of the teeth portion where the wire starts to wind is longer in the radial direction than the fourth edge portion where the wire finishes winding. The part (leader line part) can be driven radially outward.

  Therefore, even if the lead wire portion protrudes above the other wires, the wire is prevented from being pushed out by the lead wire portion when the second and subsequent layers of wire are wound, so that stable aligned winding without winding disturbance can be realized.

  Specifically, the difference in length between the first edge and the fourth edge is preferably set smaller than the outer diameter of the wire.

  If it does so, when winding the 2nd layer of a coil, it can prevent that a wire fits into the 1st layer of a coil. Therefore, the second layer of the coil can be wound in a stably aligned state without being disturbed.

  More specifically, when viewed from the axial direction, the wire lead-out portion may be located between the extended lines extending from each of the first edge portion and the fourth edge portion.

  If it does so, when winding a wire around a teeth part, since a wire is pulled to the center side of a teeth part, a wire can be stuck to the base end side of the 1st edge. Therefore, the leader line portion can be stably driven radially outward, and stable aligned winding can be performed.

  For example, a plurality of guide portions for guiding the winding position of the wire are provided in parallel to each of the first edge portion and the fourth edge portion, and at these edges, the most base of the teeth portion is provided. Of each of the guide portions located on the end side, the guide portion of the first edge portion can be separated from the guide portion adjacent to the guide portion and close to the peripheral surface of the yoke portion.

  If it does so, a leader line part can be driven to a radial direction outer side more stably, and the stable alignment winding can be performed.

  Still further, the guide portion is arranged in parallel with each of the second edge facing the first edge portion in the axial direction and the third edge portion facing the fourth edge portion in the axial direction in the teeth portion. Of these guide portions that are located closest to the base end side of the teeth portion, the guide portion of the second edge portion is adjacent to the guide portion adjacent thereto. Then, it is preferable to be away from the peripheral surface of the yoke portion.

  If it does so, since wires other than a leader line part are wound in the same state, stable alignment winding can be performed.

  The number of guide parts of the first edge part is one less than the guide part of the fourth edge part, and the guide part located closest to the base end side of the teeth part in the first edge part is You may make it face the guide part located in the 2nd from the base end side of the said teeth part in a 4th edge part.

  In addition, an inclined surface inclined downward from the protruding end side is formed on the teeth portion side of the restriction wall portion, and the drawn wire extends toward the teeth portion in contact with the inclined surface. Is preferable.

  If it does so, a contact with the lead wire part and the wire after the 2nd layer of a coil can be suppressed, and winding disorder of a wire can be prevented further.

  In particular, the present invention is suitable for a motor that is formed so that the width of the tooth portion gradually decreases from the base end toward the protrusion when viewed from the axial direction.

  That is, if the tooth portion has a tapered shape, the wire easily moves to the protruding end side and is easily disturbed, but the wire transition can be effectively prevented by driving the leader portion radially outward. Therefore, stable aligned winding can be realized even with a tapered shape.

  According to the motor of the present invention, since the space factor is improved, a high output motor can be obtained.

It is a schematic perspective view which shows a part of winding structure by the conventional aligned winding. It is a schematic plan view which shows a part of winding structure by the conventional aligned winding. It is a schematic side view which shows the motor of this embodiment. It is a schematic sectional drawing in the arrow XX line in FIG. It is a schematic perspective view which shows the part of a teeth part. It is a schematic plan view which shows the part of a teeth part. It is a schematic perspective view showing how to wind a wire. It is the schematic seen from the arrow Y direction in FIG. It is the schematic which shows the 1st layer of the coil seen from one side of the axial direction. It is the schematic which shows the 1st layer of the coil seen from the other of the axial direction. It is the schematic which shows the 2nd layer of the coil seen from one side of the axial direction. It is a schematic sectional drawing in the arrow ZZ line in FIG. It is a figure equivalent to Drawing 6 showing the modification of the motor of this embodiment. It is a schematic plan view which shows a part of modification of the other motor of this embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the following description is merely illustrative in nature and does not limit the present invention, its application, or its use.

  3 and 4 show the motor 1 of the present embodiment. The motor 1 is an inner rotor type brushless motor used for driving a washing machine or the like. The motor 1 includes a motor case 2, a rotor 3, a stator 4, a shaft 5, and the like.

  The stator 4 has an annular shape and is fixed to the inner surface of the cylindrical motor case 2. The rotor 3 has a cylindrical shape, and is disposed inside the stator 4 with a slight gap from the stator 4. The shaft 5 is fixed to the central portion of the rotor 3 in a state in which the center coincides with the rotor 3. The shaft 5 is rotatably supported by the motor case 2, and the rotor 3 and the shaft 5 rotate about the axis J.

  In the description, the direction in which the axis J extends is referred to as the axial direction, the circumferential direction with respect to the axis J is referred to as the circumferential direction, and the direction perpendicular to the axis J is referred to as the radial direction unless otherwise specified.

  The stator 4 has a yoke part 6, a tooth part 7, a coil 8, and the like. Each of the yoke part 6 and the teeth part 7 is composed of a core 10 and an insulator 12.

  The core 10 is a magnetic body and is formed, for example, by laminating a plurality of steel plates in the axial direction. The core 10 has a yoke core 10a and a plurality of tea scores 10b. Although not shown, the yoke core 10a is formed in an annular shape by connecting arc-shaped divided cores to each other. The tea score 10b protrudes in the radial direction from the yoke core 10a toward the center. A pair of eaves parts 11 and 11 projecting in opposite directions in the circumferential direction are provided at the protruding end of the tea score 10b.

  The insulator 12 is an injection molded product of resin having insulation properties, and is placed on the yoke core 10a and the tea score 10b. Details of the insulator 12 will be described later.

  The yoke part 6 is formed in a cylindrical shape by the yoke core 10a and the insulator 12, and is arranged so that the axis J and the center coincide with each other. The teeth portion 7 is composed of a tea score 10b and an insulator 12, and is arranged radially at equal intervals inside the yoke portion 6.

  The teeth portion 7 has a rectangular cross section with one side extending along the axial direction, and when viewed from the axial direction, the teeth portion 7 is formed in a tapered shape so that the width of the teeth portion 7 gradually decreases from the base end toward the protruding end. . Thereby, a space (slot 13) having a rectangular cross section is formed between the two tooth portions 7 and 7 adjacent in the circumferential direction when viewed in the axial direction.

  A plurality of coils 8 are formed by winding the wires 14 for each tooth (concentrated winding) while passing the wires 14 through the slots 13 (see FIG. 7).

  The wire 14 is an ordinary electric wire having a circular cross-sectional profile, and its surface is covered with an insulating thin film. The wires 14 are wound in layers on the teeth portion 7 in an aligned state (aligned winding).

  The motor 1 is devised so that the aligned winding can be stably performed without disturbing the wire 14. As a result, the outer peripheral surface of the coil 8 becomes flat, and the wires 14 are tightly accommodated in the slots 13 to improve the motor performance.

  5 and 6 show an enlarged portion of the tooth portion 7.

  The insulator 12 is composed of a pair of halved members, and these halved members are placed on the yoke core 10a and the tee score 10b and abutted against each other. Thereby, the part which the wire 14 can contact, specifically, the inner peripheral surface 6a of the yoke portion 6, the upper and lower end surfaces 7a and the left and right side surfaces 7b of the teeth portion 7, and the outer peripheral surface 11a portion of the flange portion 11 Is covered by an insulator 12.

  Further, in order to prevent the coil 8 from protruding, the insulator 12 is provided with an outer wall portion 15 (regulating wall portion) and an inner wall portion 16. The outer wall portion 15 protrudes in the axial direction from the end surface of the yoke portion 6 facing in the axial direction, and extends in the circumferential direction along the inner peripheral surface 6 a of the yoke portion 6. The inner wall portion 16 projects in the axial direction from the end surface of the flange portion 11.

  A lead-out groove (wire lead-out portion) 17 is formed in the protruding end of the outer wall portion 15 for each tooth portion 7. A wire 14 extending from the other coil 8, that is, a so-called connecting wire is drawn out to the tooth portion 7 side through the lead-out groove 17. In the case of the tooth portion 7 in FIG. 5, the drawn wire 14 is then wound around the tooth portion 7 sequentially in a clockwise direction as viewed from the protruding end side.

  A plurality of guide portions 18 for guiding the winding position of the wire 14 are provided on the four edge portions 20 of the tooth portion 7. Specifically, each of the edge portions 20 of the tooth portion 7 extending in the radial direction is provided with a recess along which the wire 14 as the guide portion 18 is fitted in parallel along the edge portion 20. Each of the guide portions 18 of the two edge portions 20 that face each other in the circumferential direction is disposed so as to face each other.

  In order to distinguish each edge 20, when the axial direction is viewed from the side from which the wire 14 is drawn out from the drawing groove 17 (drawing side), the wire 14 starts to be wound out of the two edges 20 of the tooth portion 7. The edge 20 on the side is referred to as a first edge 21, and the edge 20 on the side where the wire 14 has been wound is referred to as a fourth edge 24. In addition, the edge 20 that faces the first edge 21 in the axial direction is referred to as a second edge 22, and the edge 20 that faces the fourth edge 24 in the axial direction is referred to as a third edge 23. .

  In this motor 1, the inner peripheral surface 6 a of the yoke portion 6 located on both sides of the tooth portion 7 is displaced in the radial direction, and the first edge portion 21 is longer than the fourth edge portion 24.

  Specifically, as shown in FIG. 6, in the case of the teeth portion 7, the right side of the teeth portion 7 is more right than the inner peripheral surface 6 a of the yoke portion 6 located on the left side of the teeth portion 7 when viewed from the drawer side. The inner peripheral surface 6 a of the yoke portion 6 located at the position is located on the radially outer side, and the length L 1 of the first edge portion 21 is longer than the length L 2 of the fourth edge portion 24.

  Specifically, the difference in length between the first edge portion 21 and the fourth edge portion 24 is set to be smaller than the outer diameter of the wire 14.

  The guide portion 18 of the fourth edge portion 24 is disposed from the base end of the tooth portion 7 to the protruding end at a pitch P1 that is substantially the same as the outer diameter of the wire 14 without a gap. On the other hand, the guide portion 18 of the first edge portion 21 is the first guide portion 18 (first roll first guide portion 18a) that is located closest to the base end side of the teeth portion 7 because the first edge portion 21 is long. Is also arranged at a position close to the inner peripheral surface 6a of the yoke portion 6 away from the second guide portion 18 (also referred to as the second winding first guide portion 18b) adjacent thereto.

  That is, in the motor 1, by using the difference in length between the first edge portion 21 and the fourth edge portion 24, the first winding first guide portion 18 a in contact with the inner peripheral surface 6 a of the yoke portion 6, 2 A gap region 25 smaller than the outer diameter of the wire 14 is provided between the winding first guide portion 18b.

  As a result, the distance P2 from the base end of the teeth portion 7 to the second roll first guide portion 18b is larger than the pitch P1 due to the gap region 25.

  As shown in FIG. 6, the lead-out groove 17 is disposed so as to be positioned between virtual extension lines V extending from the first edge portion 21 and the fourth edge portion 24 when viewed from the axial direction. . The lead-out groove 17 of the motor 1 is located substantially on the center line C of the tooth portion 7. By doing so, the wire 14 can be stably adhered to the proximal end of the tooth portion 7.

  As shown in FIG. 7, when winding the wire 14 around the tooth portion 7, first, the wire 14 positioned radially outward from the outer wall portion 15 is hooked on the pullout groove 17 and then pulled out through the pullout groove 17. It is. Thereby, the drawing position of the wire 14 is positioned. Then, the wire 14 whose drawing position is positioned is wound from the base end side of the first edge portion 21, and at this time, the drawing groove 17 is positioned closer to the center side of the tooth portion 7 than the first edge portion 21. Therefore, the wire 14 hooked on the first edge portion 21 is pulled and comes into close contact with the proximal end side of the tooth portion 7. In the case of this motor 1, the wire 14 can be stably guided to the first guide portion 18a of the first volume.

  Further, in the motor 1, an inclined surface 26 that is inclined downward from the protruding end toward the base end is formed on the tooth portion 7 side of the outer wall portion 15. Therefore, the wire 14 drawn through the drawing groove 17 is wound around the tooth portion 7 to extend obliquely downward toward the first edge portion 21 and is in contact with the inclined surface 26 (this drawing groove 17). The portion of the wire 14 between the first edge portion 21 and the first edge portion 21 is also referred to as a leader portion 14a). The wire 14 hooked on the first edge 21 is then hooked on the second edge 22.

  As shown in FIG. 8, the guide part 18 (also referred to as the first and second guide part 18 c) located closest to the base end side of the tooth part 7 at the second edge part 22 is the first and second guide part 18 a. Is different from the inner peripheral surface 6a of the yoke part 6 and is located close to the guide part 18 (also referred to as the second-roll second guide part 18d) adjacent thereto. That is, the second gap region 27 smaller than the outer diameter of the wire 14 is disposed between the first and second guide portions 18 c in contact with the second and second guide portions 18 d and the inner peripheral surface 6 a of the yoke portion 6. Is provided.

  Accordingly, the wire 14 hooked to the first guide portion 18a of the first turn 21 of the first edge portion 21 extends slightly obliquely along the side surface 7a of the tooth portion 7, and then turns one turn of the second edge portion 22. The second guide portion 18c is hooked. Thereafter, the wire 14 is wound toward the protruding end of the tooth portion 7 while being positioned by the guide portions 18 of the third edge portion 23 and the fourth edge portion 24 sequentially from the proximal end side of the tooth portion 7.

  As shown in FIG. 9, when viewed from the drawer side, the wires 14 wound around the tooth portion 7 are uniformly arranged in a state of extending obliquely from the fourth edge portion 24 toward the first edge portion 21. As shown in FIG. 10, when the axial direction is viewed from the reverse direction on the drawing side, the wire 14 wound around the tooth portion 7 is uniformly distributed between the second edge portion 22 and the third edge portion 23. Are lined up in parallel with each other.

  Thus, when the first layer of the coil 8 is formed, the wire 14 is folded back from the protruding end of the tooth portion 7 and wound so as to overlap the first layer toward the proximal end of the tooth portion 7. A second layer of 8 is formed. At this time, since the recess formed between the two adjacent wires 14 and 14 functions as the guide portion 18, the wire 14 is wound in an aligned state while being guided by these recesses.

  And as shown in FIG. 11, the wire 14 reaches the proximal end side of the teeth part 7, and the wire 14 is the leader part 14a located in the 1st volume 1st guide part 18a, and the 2nd volume 1st guide part. When the wire 14 is wound around the wire 14 (indicated by reference numeral W1) located at 18b, there is a sufficient gap between the wires 14a and W1, so that the wire 14 is not pushed out to the lead wire portion 14a. 14a and W1 are fitted.

  In particular, in the case of the motor 1, since the tooth portion 7 has a tapered shape, the wire 14 is easily transferred to the protruding end side. For this reason, when the wire 14 comes into contact with the lead wire portion 14a, the wire 14 is easily pushed out and is disturbed. On the other hand, in this motor 1, since the wire 14 is fitted in the gap, the wire 14 is hooked on the wire W1, so that the transition can be effectively prevented.

  Since the gap region 25 is set to be smaller than the outer diameter of the wire 14, the wire 14 that fits between the wires 14 a and W <b> 1 does not fit completely into the first layer of the coil 8.

  Therefore, the second layer of the coil 8 can be wound in a stably aligned state without being disturbed.

  When the second layer of the coil 8 is formed, the wire 14 is again folded from the base end of the tooth portion 7 and wound so as to overlap the second layer toward the protruding end of the tooth portion 7. A third layer is formed. Thereafter, the multilayer coil 8 is formed by repeating the same operation.

  Stable aligned winding can also be performed from the third layer onward of the coil 8.

  That is, in the first layer of the coil 8, the leader line portion 14 a located closest to the proximal end of the tooth portion 7 at the first edge 21 is located closest to the proximal end of the tooth portion 7 at the fourth edge 24. Since the wire 14 (indicated by the symbol W2) is located on the outer side in the radial direction, the wire 14 (reference symbol W3) located closest to the proximal end of the tooth portion 7 at the first edge 21 in the second layer of the coil 8. Can be positioned symmetrically with respect to the wire 14 (indicated by reference numeral W4) located closest to the base end side of the tooth portion 7 at the fourth edge 24 and the center line C of the tooth portion 7. .

  Therefore, the third and subsequent layers of the coil 8 can be wound in a stably aligned state without being affected by the lead wire portion 14a.

  Finally, the wire 14 drawn from the base end side of the fourth edge portion 24 is again drawn radially outward from the outer wall portion 15 through the drawing groove 17 and wound around the other tooth portion 7.

In particular, as shown in FIG. 12, the angle of the inclined surface 26 (the angle between the end surface 7a of the tooth portion 7 orthogonal to the axis J and the inclined surface 26) θ is set to θ ≧ COS ⁻¹ ((P2 ÷ 2) ÷ d) It may be set so as to satisfy the relational expression of +90. Here, “d” is the outer diameter of the wire 14, and “P2” is the distance from the base end of the tooth portion 7 to the second volume first guide portion 18b shown in FIG.

  Then, the contact between the lead wire portion 14a and the second and subsequent wires 14 of the coil 8 can be suppressed, and the winding disorder of the wire 14 can be further prevented.

  The motor according to the present invention is not limited to the above-described embodiment, and includes various other configurations.

  As shown in FIG. 13, the first volume first guide portion 18 a is not necessarily required and may not be provided. Specifically, the number of the guide portions 18 of the first edge portion 21 is decreased by one than that of the guide portions 18 of the fourth edge portion 24, and the second roll 1 guide portion 18 b is replaced by the first edge portion 21. The guide portion 18 is located closest to the base end side of the teeth portion 7. The portion of the first edge portion 21 on the base end side from the second roll 1 guide portion 18b is constituted by two flat surfaces having no depressions.

  Even in this case, if the lead-out groove 17 is positioned on the center side of the tooth portion 7 with respect to the first edge portion 21, the lead-out line portion 14a is pulled and is in close contact with the proximal end side of the tooth portion 7. . Even if it is not in close contact, the wire 14 constituting the second layer of the coil 8 is wound between the lead wire portion 14a and the wire 14 located in the second winding first guide portion 18b, thereby leading the lead wire portion. 14 a is pushed by the wire 14 and driven to the inner peripheral surface 6 a side of the yoke portion 6. Therefore, the second layer of the coil 8 can be wound in a stably aligned state without being disturbed.

  As shown in FIG. 14, the drawing groove 17 is not necessarily arranged on the center side of the tooth portion 7. If at least the first edge portion 21 of the tooth portion 7 is longer on the proximal end side than the fourth edge portion 24, interference between the lead wire portion 14a and the wire 14 on and after the second layer of the coil 8 can be suppressed. .

  In the embodiment described above, the entire side surface on the first edge portion 21 side of the tooth portion 7 is elongated toward the proximal end side. However, for example, a recess is formed in the proximal end portion of the first edge portion 21 and the teeth portion 7 Only a part on the one edge 21 side may be elongated toward the base end side.

  The present invention is particularly effective for a tapered tooth portion, but is also applicable to a linear tooth portion. Further, the present invention may be applied to an outer rotor type motor. The wire drawing portion is not limited to the drawing groove 17 provided at the protruding end of the outer wall portion 15. For example, a protrusion capable of hooking a wire may be provided on the protruding end of the outer wall portion 15, and the protrusion may be used as the wire lead-out portion. In short, it is only necessary to be able to position the wire drawing position.

DESCRIPTION OF SYMBOLS 1 Motor 2 Motor case 3 Rotor 4 Stator 5 Shaft 6 Yoke part 6a Inner peripheral surface 7 Teeth part 8 Coil 12 Insulator 14 Wire 15 Outer wall part (regulation wall part)
17 Leading groove (wire lead part)
18 Guide part 20 Edge part 21 First edge part 22 Second edge part 23 Third edge part 24 Fourth edge part

Claims (8)

A motor comprising a motor case, a rotor rotatably supported by the motor case, and a stator fixed to the motor case,
The stator is
A cylindrical yoke portion arranged so that its center coincides with the axis of the rotor;
Teeth portions having a rectangular cross section protruding radially from the peripheral surface of the yoke portion and arranged radially,
A regulating wall portion that protrudes in an axial direction from an end surface of the yoke portion, and a wire drawing portion is provided for each tooth portion;
A plurality of coils formed in layers by winding the wires drawn in a state of being positioned by the wire drawing portion in a state aligned from the base end side of the teeth portion;
Have
When the axial direction is viewed from the side from which the wire is drawn, the peripheral surfaces of the yoke portions located on both sides of the teeth portion are displaced in the radial direction, whereby two edges of the teeth portion extending in the radial direction are obtained. The motor in which the 1st edge part where the said wire starts winding is longer than the 4th edge part where the said wire ends winding among parts. The motor according to claim 1,
A motor in which a difference in length between the first edge and the fourth edge is set smaller than an outer diameter of the wire. In the motor according to claim 1 or 2,
The motor in which the wire lead-out portion is positioned between extension lines extending from the first edge portion and the fourth edge portion as viewed in the axial direction. The motor according to claim 3, wherein
A plurality of guide portions for guiding the winding position of the wire are provided in parallel with each of the first edge portion and the fourth edge portion, and are opposed to each other.
Among these guide portions, the guide portions of the first edge portion of the guide portions that are located closest to the base end side of the teeth portion are separated from the guide portions adjacent to the guide portions on the peripheral surface of the yoke portion. Proximity motor. The motor according to claim 4,
Furthermore, the guide portion is also arranged in parallel with each of the second edge in the teeth portion that faces the first edge portion in the axial direction and the third edge portion that faces the fourth edge portion in the axial direction. Are provided opposite to each other,
Among these guide portions that are located closest to the base end side of the tooth portion, the guide portion of the second edge portion is adjacent to the guide portion adjacent to the guide portion, and the peripheral surface of the yoke portion. Away from the motor. The motor according to claim 3, wherein
A plurality of guide portions for guiding the winding position of the wire are provided in parallel with each of the first edge portion and the fourth edge portion, and are opposed to each other.
The number of guide portions of the first edge portion is one less than the guide portion of the fourth edge portion, and the guide portion located closest to the base end side of the teeth portion in the first edge portion is the first edge portion. A motor that faces a guide portion located second from the base end side of the teeth portion at four edge portions. In the motor according to any one of claims 3 to 6,
On the teeth portion side of the restriction wall portion, an inclined surface that is inclined downward from the protruding end side is formed,
The motor in which the drawn-out wire extends toward the teeth portion in a state of being in contact with the inclined surface. In the motor according to any one of claims 1 to 7,
A motor formed such that the width of the tooth portion gradually decreases from the base end toward the protruding end when viewed from the axial direction.

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