JP2011035989A - Stator for motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a stator for motors which does not involve the risk that a crossover is pulled and broken at winding to a core segment. <P>SOLUTION: The stator includes a plurality of core segments 11, which each have a yoke part and a tooth part and are coupled in a bendable way with one another at bend joints 12 at both ends of each yoke; an insulator 15 which covers the yoke part and the tooth part of the core segment 11; winding 17 which is wound on the tooth part of the core segment 11 via the insulator 15, thereby forming a coil part and is drawn around to another core segment 11 as a crossover thereby being wound on the tooth part of another core segment 11 to form the coil part; a crossover storage groove 15x, which is provided over the overall length of the yoke part 15a of the insulator 15 covering the yoke part and passes over the bend joint 12; a crossover winding start storage groove 15y, which branches off from the crossover storage groove 15x and reaches the base of the teeth part; and a crossover winding end storage groove 15z which branches off from the crossover storage groove 15x and reaches the position of the winding end of the tooth part. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a stator of a motor.

  Conventionally, a plurality of core segments that are movably connected, a plurality of insulators that cover the core segments and have a head portion having a space through which a crossover is inserted, and a coil portion wound around the core segment. A stator constituent member for an electric motor is disclosed which is formed and includes a connecting wire that passes through the head portion and a coil wire that is inserted (see, for example, Patent Document 1).

  In the stator constituent member, the connecting wire is disposed on the pitch line of the bent joint portion of the core segment. Further, a back plate on the rear, an outer guide on the front, and a crossover guide whose tip is located near the bent joint of the core segment stand on the bottom plate of the head portion of the insulator, and the crossover is connected to the back plate and the outer guide. In addition to being inserted into the narrow space formed by the wiring, the wiring is made so as to be in contact with the tip of the crossover guide.

Japanese Patent Laid-Open No. 10-271718 (page 3, FIGS. 1 to 3)

  However, according to the above conventional technique, the outer guide that defines the outer peripheral side of the space through which the crossover is inserted is not provided in the vicinity of the bent joint portion of the core segment. Therefore, if the relative angle between the core segments is 180 ° (in series) or less, the connecting wire will not be loosened, but if it is opened to 180 ° or more (reversely warped), the position of the connecting wire cannot be fixed. .

  Therefore, after winding the coil of the first core segment, the relative angle between the core segments is set to 180 °, the connecting wire is linearly routed to the fourth core segment, and the coil of the fourth core segment is wound. If the relative angle between the core segments is opened to 180 ° or more, the connecting wire is loosened.

  The looseness of the connecting wire is absorbed by the winding tension when the coil of the fourth core segment is wound, the winding of the fourth core segment is finished, and the relative angle between the core segments is 180 ° or more. When the angle is 180 ° or less, there is a problem that the connecting wire is pulled and disconnected.

  The present invention has been made in view of the above, and it is an object of the present invention to obtain a stator for a motor that does not have a fear of disconnection due to a jumper wire being pulled around a core segment.

  In order to solve the above-described problems and achieve the object, the present invention includes a plurality of core segments that have a yoke part and a tooth part and are connected to each other at a bending joint at both ends of the yoke part, An insulator covering the yoke portion and the teeth portion of the core segment, and a coil portion is formed by being wound around the teeth portion of the core segment via the insulator, and is routed to another core segment as a crossover And a winding that is wound around a tooth portion of another core segment to form a coil portion, and is provided over the entire length of the yoke portion of the insulator covering the yoke portion. A connecting wire receiving groove passing over the connecting portion, a connecting wire winding starting portion receiving groove branched from the connecting wire receiving groove and reaching the root of the teeth portion, and the teeth portion branched from the connecting wire receiving groove Characterized in that it comprises a connecting wire winding end portion housing groove reaching the winding end position.

  According to the present invention, when the core segments are reversely warped and wound, and then when the plurality of core segments are formed in an annular shape, the relative angle between the core segments is from a state of 180 ° or more. Even if it is 180 ° or less, the connecting wire is not pulled and disconnected.

FIG. 1 is a front view showing a core segment according to the first embodiment of the stator of the motor according to the present invention. FIG. 2 is a partially enlarged front view of the core segment of the first embodiment. FIG. 3 is a perspective view showing a state in which the core segment of Embodiment 1 is covered with an insulator. FIG. 4-1 is a partially enlarged front view showing a state in which the stator of Embodiment 1 is reversely warped. FIG. 4-2 is a partially enlarged front view showing a state in which the stator of the first embodiment is developed linearly. FIG. 4-3 is a partially enlarged front view showing a state where the stator of the first embodiment is formed in an annular shape. FIG. 5 is a partially enlarged front view showing a state where the stator according to the second embodiment of the motor according to the present invention is developed linearly.

  Embodiments of a motor stator according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
1 is a front view showing a core segment of a first embodiment of a stator of a motor according to the present invention, FIG. 2 is a partially enlarged front view of the core segment of the first embodiment, and FIG. It is a perspective view which shows the state which coat | covered the core segment of Embodiment 1 with the insulator.

  As shown in FIGS. 1 and 2, the stator 91 (see FIG. 4-3) of the motor according to the first embodiment has twelve substantially T-shaped core segments 11 that can be bent with respect to each other at the bending joint 12. A stator core 10 that is connected and formed in an annular shape is provided. The core segment 11 is formed of a laminated steel plate in which a plurality of steel plates are laminated.

  The core segment 11 has a yoke portion 11a that becomes an outer peripheral magnetic path of the stator core 10, and a teeth portion 11b that protrudes inward from the central portion of the yoke portion 11a and serves as a magnetic pole. The bent joint portion 12 is provided at both ends of the yoke portion 11a.

  As shown in FIG. 3, the insulator 15 is mounted from the front side and the back side of the core segment 11 so as to cover the teeth portion 11b and the yoke portion 11a. The yoke portion 15a of the insulator 15 that covers the front surface of the yoke portion 11a of the core segment 11 and the tooth tip portion 15b of the insulator 15 that covers the tip portion of the tooth portion 11b of the core segment 11 are formed in a bowl-like shape. Has been.

  FIG. 4-1 is a partially enlarged front view showing a state in which the stator according to the first embodiment is reversely warped, and FIG. 4-2 shows a state in which the stator according to the first embodiment is expanded linearly. FIG. 4-3 is a partially enlarged front view, and FIG. 4-3 is a partially enlarged front view showing a state in which the stator of the first embodiment is formed in an annular shape.

  As shown in FIGS. 4A to 4C, a jumper housing groove 15x is provided in front of the yoke portion 15a of the insulator 15 over the entire length of the yoke portion 15a. The crossover receiving groove 15 x is provided so as to pass over the bent joint portion 12 of the core segment 11. The width of the connecting wire receiving groove 15x is formed to be slightly larger than the diameter of the winding 17, and the depth of the connecting wire receiving groove 15x is formed to a depth capable of receiving the three-phase three connecting wires (windings) 17. ing.

  The yoke portion 15a is provided with a crossover winding start portion receiving groove 15y that is branched inwardly from a substantially central portion of the crossover receiving groove 15x and reaches the root of the teeth portion 15c in a front view. Further, a jumper winding end receiving groove 15z that branches rightward from the end of the jumper receiving groove 15x inward and reaches the coil winding end position in a front view is provided in the yoke portion 15a. The width and depth of the connecting wire winding start portion receiving groove 15y and the connecting wire winding end portion receiving groove 15z are formed to be equal to the width and depth of the connecting wire receiving groove 15x.

  Next, a method for winding the stator 91 will be described. When the stator core 10 fitted with the insulator 15 is set on a rotary stage (not shown), the stator core 10 is in a reverse warped state as shown in FIG. 4-1, and the teeth of the insulator 15 are wound by a winding machine (not shown). Winding can be performed on the portion 15c (the teeth portion 11b of the core segment 11).

  When winding the U-phase winding 17 around the core segment 11 on the left side of FIG. 4A, the winding 17 is connected to the tooth portion 15c (the teeth portion 11b) through the connecting wire receiving groove 15x and the connecting wire winding start portion receiving groove 15y. Then, the coil portion is formed by winding around the tooth portion 15c (tooth portion 11b). When the winding of the coil portion is completed, the winding 17 is wound on the three core segments 11 (not shown) on the right through the connecting wire winding end receiving groove 15z and the connecting wire receiving groove 15x. A U-phase winding is performed on the core segment 11.

  When winding the V-phase winding 17 around the core segment 11 on the right side of FIG. 4A, the winding 17 is connected to the teeth 15c (the teeth 11b) through the connecting wire receiving groove 15x and the connecting wire winding start receiving groove 15y. Then, the coil portion is formed by winding around the tooth portion 15c (tooth portion 11b). When the winding of the coil portion is completed, the winding 17 is wound around the core segment 11 adjacent to the right through the connecting wire winding end receiving groove 15z and the connecting wire receiving groove 15x. 11 is V-phase winding.

  W-phase winding can also be performed in the same manner as described above. The winding end ends of the U-phase, V-phase, and W-phase windings 17 are connected as neutral points. The winding start ends of the U-phase, V-phase, and W-phase windings 17 are respectively connected to lead wires and drawn to the outside. As shown in FIGS. 4-3 and 1, the stator 91 that has been wound and connected is formed in an annular shape and is assembled in a motor casing (not shown).

  As shown in FIG. 4A, the stator 91 of the motor according to the first embodiment described above has the connecting wire housing groove 15x bent and joined 12 even if the stator 91 is reversely warped by the bent joint 12. Since it passes above, it is possible to prevent the connecting wire 17 from loosening. Therefore, when the stator core 10 is in the reverse warped state and the U-phase, V-phase, and W-phase windings are performed, the stator 91 is formed in an annular shape as shown in FIG. 4-3. In addition, even if the relative angle between the core segments 11 is changed from 180 ° or more to 180 ° or less, the connecting wire 17 is not pulled and disconnected.

  Moreover, since the crossover winding start portion receiving groove 15y and the crossover winding end portion receiving groove 15z correspond to the coil winding start position and winding end position, respectively, the movement of the nozzle of the winding machine is simplified. It is possible to prevent the coil from being disturbed. Further, the connecting wire 17 is easily routed by branching the connecting wire winding start portion receiving groove 15y from the connecting wire receiving groove 15x.

Embodiment 2. FIG.
FIG. 5 is a partially enlarged front view showing a state where the stator according to the second embodiment of the motor according to the present invention is developed linearly. The stator 92 of the second embodiment is different from the stator 91 of the first embodiment in the form of a branch of the crossover winding start portion receiving groove 15m, and the other parts are not different.

  The connecting wire winding start portion receiving groove 15m of the stator 92 of the second embodiment is at the root of the tooth portion 15c (tooth portion 11b) closer to the center of the yoke portion 15a than the connecting wire winding end portion receiving groove 15z. The receiving groove 15x is branched at a right angle inward.

  The stator 92 according to the second embodiment has the same effects as the stator 91 according to the first embodiment except that the connecting wire 17 is difficult to be routed.

  As described above, the stator of the motor according to the present invention is useful without fear of disconnection of the jumper wire.

DESCRIPTION OF SYMBOLS 10 Stator core 11 Core segment 11a Yoke part 11b Teeth part 12 Bending part 15 Insulator 15a Yoke part 15b Teeth tip part 15c Teeth part 15x Crossing wire accommodation groove 15y, 15m Crossing wire winding start part accommodation groove 15z Part receiving groove 17 Winding (crossover wire)
91, 92 Stator

Claims (3)

A plurality of core segments that have a yoke part and a teeth part and are connected to each other at the bending joints at both ends of the yoke part;
An insulator covering the yoke portion and the teeth portion of the core segment;
It is wound around the tooth portion of the core segment via the insulator to form a coil portion, is turned into a connecting wire, is routed to another core segment, and is wound around the tooth portion of the other core segment. Windings forming the part,
In the stator of a motor comprising
A crossover receiving groove provided over the entire length of the yoke portion of the insulator covering the yoke portion and passing over the bent joint portion;
A crossover winding start portion receiving groove branched from the crossover wire receiving groove and reaching the base of the teeth portion;
A connecting wire winding end receiving groove that branches off from the connecting wire receiving groove and reaches a winding end position of the teeth portion;
The stator of the motor characterized by comprising.   2. The motor stator according to claim 1, wherein the connecting wire winding start portion receiving groove is branched inwardly from the connecting wire receiving groove. 3.   The width of the connecting wire receiving groove is formed to be larger than the diameter of the winding, and the depth of the connecting wire receiving groove is formed to a depth capable of storing the three windings. Item 2. A motor stator according to Item 1.

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