JP5237049B2 - Insulator, stator and stator manufacturing method - Google Patents

Description

  The present invention relates to an insulator, a stator, and a method for manufacturing the stator.

  2. Description of the Related Art Conventionally, a stator of a rotating electrical machine includes an annular stator core having a plurality of teeth portions extending radially inward in the radial direction, and coils wound around the teeth portions. Some of such stators have a structure in which the stator core is divided for each tooth portion in order to improve the coil space factor (see, for example, Patent Document 1). Each divided core is provided with an insulator having a shape corresponding to the shape, and a coil is wound around the tooth portion of each divided core via the insulator. Adjacent insulators are connected to each other so as to be rotatable by a connecting rotation portion formed in each insulator.

  When manufacturing a stator in which the stator core is composed of split cores as described above, for example, each split core connected by the connecting and rotating portion of the insulator is developed with the tips of the teeth portions opened more than in the annular state. As a state, a coil is wound around each tooth part, and then each divided core is rolled into an annular shape so that the tooth part faces radially inward to form a stator. As described above, since the coil can be wound in the deployed state of the stator, the space factor of the coil can be improved.

By the way, in the stator as described above, from the coil wound around the split core, a winding start end portion (winding end terminal line) and a winding end end portion (winding end terminal line) are drawn out, respectively. The winding start terminal line and the winding end terminal line are inserted into grooves formed in the insulator, respectively, at the time of work for circularizing each divided core.
Japanese Patent Application Laid-Open No. 2006-115685

  However, in the stator as described above, since the winding end terminal wire of the coil is not fixed, the stator is detached from the holding groove and loosened by its own elastic force, for example. Then, the loosening of the winding end terminal wire may cause the coil alignment state to collapse and interfere with adjacent coils, causing a load to be applied to the connecting rotation portion of the insulator during the annular core circularization step, resulting in damage. It was. In order to prevent this problem, conventionally, a process of annularly forming each divided core is performed while holding the winding end terminal line with a jig or the like so as not to loosen, and this causes deterioration in workability.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an insulator, a stator, and a stator manufacturing method capable of improving workability.

In order to solve the above-mentioned problem, the invention according to claim 1 is attached to each of a plurality of divided cores arranged in a ring and constituting a stator of a rotating electrical machine, and the divided cores and the divided cores are radially inward. An insulator for electrically insulating a coil wound around a tooth portion provided to extend, a tooth covering portion covering at least a part of the tooth portion of the divided core, and the tooth covering portion And a holding groove formed along the radial direction at a radially outer position and capable of inserting the winding end terminal line of the coil from the axial direction, and at a position outside the radial center in the holding groove, A locking projection for locking the winding end terminal line inserted into the holding groove and preventing the winding end terminal line from being detached from the holding groove is provided in a circumferential direction constituting the holding groove. A pair of opposing side walls A first inclined portion for guiding the winding end terminal wire of the coil into the holding groove is formed at one of the insertion side end portions, and the locking protrusion is formed by either one of the pair of side wall portions. A second inclined portion provided on the other end of the locking projection and opposite to the insertion side is formed with a second inclined portion that faces the first inclined portion in the circumferential direction and is inclined so as to be substantially parallel to the first inclined portion. It is characterized by that.

  In the present invention, the split core can be annularized in a state where the winding end terminal wire of the coil is locked to the locking projection of the holding groove so that the winding end terminal wire does not loosen during the annularization. It becomes possible to do. This eliminates the need to hold the end-of-winding wire with a jig or the like when the split core is circularized, thereby improving workability. Further, since the locking projection is provided at a position outside the center in the radial direction in the holding groove, the winding end terminal line can be suitably held in the holding groove.

In this invention, when the winding end terminal wire of the coil is inserted into the holding groove, the winding end terminal wire is guided by the first inclined portion, so that the winding end terminal wire can be easily inserted into the holding groove. .

  In this invention, the first inclined portion and the second inclined portion of the locking projection form an introduction path for introducing the coil winding end line into the holding groove (on the opposite side of the locking projection). The winding end terminal wire can be easily inserted into the holding groove. Further, after the winding end terminal line is inserted into the holding groove, the winding end terminal line is easily stabilized in a state of being sandwiched between the second inclined portion and the first inclined portion.

According to a second aspect of the present invention, a plurality of divided cores arranged in a ring and constituting a stator of a rotating electrical machine are respectively attached to the divided cores and teeth portions provided to extend radially inward from the divided cores. An insulator for electrically insulating a coil wound around the teeth, a tooth covering portion covering at least a part of the teeth portion of the split core, and a diameter at a position radially outward from the teeth covering portion A holding groove that is formed along the direction and capable of inserting the winding end terminal line of the coil from the axial direction, and is inserted into the holding groove at a position outside the radial center in the holding groove. A locking projection is provided for locking with the winding end terminal line and suppressing the separation of the winding end terminal line from the holding groove, and the holding groove has a position opposite to the insertion side than the locking projection. And the locking projection is a diameter A holding projection is formed at a position shifted in the direction, and the locking projection and the holding projection are configured to hold the winding end terminal wire of the coil inserted into the holding groove from both sides in the axial direction. It is characterized by that.

In the present invention , the split core can be annularized in a state where the winding end terminal wire of the coil is locked to the locking projection of the holding groove so that the winding end terminal wire does not loosen during the annularization. It becomes possible to do. This eliminates the need to hold the end-of-winding wire with a jig or the like when the split core is circularized, thereby improving workability. Further, since the locking projection is provided at a position outside the center in the radial direction in the holding groove, the winding end terminal line can be suitably held in the holding groove. Further, since the winding end terminal wire of the coil inserted into the holding groove is held from both sides in the axial direction by the locking projection and the holding projection, the winding end terminal wire can be stably held.
According to a third aspect of the present invention, in the insulator according to the second aspect , the holding protrusion is formed in the holding groove at a position shifted inward from the locking protrusion in the radial direction. The stop protrusion and the holding protrusion are arranged such that an angle formed by a straight line connecting the locking protrusion and the holding protrusion with respect to a horizontal plane extending radially outward from the holding protrusion is a portion where the winding end terminal wire is pulled out from the coil. It is set so that it may become smaller than the angle which the part from the extraction | drawer location from the said coil in the said winding end terminal line with respect to the horizontal surface extended radially outward from the said holding | maintenance protrusion forms .

  In this invention, because the angle with respect to the horizontal plane of the straight line connecting the locking projection and the holding projection is configured to be smaller than the angle with respect to the horizontal plane of the portion from the coil end position to the holding projection at the winding end terminal line, The winding end terminal wire of the coil can be suitably held by the locking protrusion and the holding protrusion.

According to a fourth aspect of the present invention, there is provided a plurality of divided cores arranged in a ring and constituting a stator of a rotating electrical machine, and the divided cores and teeth portions provided on the divided cores so as to extend radially inward. An insulator for electrically insulating a coil wound around the teeth, a tooth covering portion covering at least a part of the teeth portion of the split core, and a diameter at a position radially outward from the teeth covering portion A holding groove that is formed along the direction and capable of inserting the winding end terminal line of the coil from the axial direction, and is inserted into the holding groove at a position outside the radial center in the holding groove. A locking projection is provided for locking with the winding end terminal line and suppressing the separation of the winding end terminal line from the holding groove, and the adjacent insulator has a connecting projection extending in the axial direction, Next to the direction end A connecting rotation portion that is connected to an insulator that covers the divided core and allows relative rotation, and the connection rotation portion includes an opening portion that opens in a radial direction and circumferential width is expandable to form, have a insertable coupling recess the coupling protrusion from the opening portion, the coupling convex portion is formed in a cylindrical shape, the connecting pivot portion, The connecting convex portion is formed so as to be insertable by forming a thin end between the inner peripheral surface of the concave portion and the outer peripheral surface of the connecting rotating portion so that the tip of the connecting rotating portion can swing. Features.
In the present invention, the split core can be annularized in a state where the winding end terminal wire of the coil is locked to the locking projection of the holding groove so that the winding end terminal wire does not loosen during the annularization. It becomes possible to do. This eliminates the need to hold the end-of-winding wire with a jig or the like when the split core is circularized, thereby improving workability. Further, since the locking projection is provided at a position outside the center in the radial direction in the holding groove, the winding end terminal line can be suitably held in the holding groove.

  In this invention, since it is possible to insert the connecting convex portion from the radial direction into the connecting concave portion of the connecting rotating portion, each insulator can be connected after the insulator is assembled to the split core, and the workability is further improved. Can be achieved.

In this invention, the outer diameter of the connection convex part can be enlarged by making the connection convex part cylindrical, and the connection retention can be improved by improving the strength of the connection convex part.
According to a fifth aspect of the present invention, the insulator according to any one of the first to fourth aspects is connected to form a plurality of the divided cores in an annular shape, and a coil is wound around each of the divided cores via the insulator. and wherein the benzalkonium such are instrumentation.

In this invention, the same effect as that of the invention described in any one of claims 1 to 4 can be obtained.
According to a sixth aspect of the present invention, there is provided a stator in which insulators that respectively cover a plurality of divided cores are connected, the plurality of divided cores are arranged in an annular shape, and a coil is wound around each divided core via the insulators. 5. The manufacturing method according to claim 1, wherein the insulator according to any one of claims 1 to 4 is assembled to each of the split cores, the coil is wound around each of the split cores, and a winding end terminal wire of the coil Is inserted into the holding groove of the insulator and locked to the locking protrusion in the holding groove, and the plurality of divided cores are annularized in this state.

In this invention, the winding end terminal wire of the coil is inserted into the holding groove of the insulator and locked to the locking protrusion in the holding groove, and the plurality of split cores are circularized in this state. In addition, it is not necessary to hold the winding end terminal wire with a jig or the like, and workability can be improved. Further, since the locking projection is provided at a position outside the center in the radial direction in the holding groove (see claims 1 , 2 and 4 ), the winding end terminal line can be suitably held in the holding groove. Become.

A seventh aspect of the present invention is the stator manufacturing method according to the sixth aspect , wherein the insulator according to any one of the first to fourth aspects is assembled to each of the divided cores to constitute the stator. After the insulators are connected in a row, the coils are wound around the divided cores, and the insulators are rotated relative to each other to form a plurality of divided cores.

  In this invention, since it is possible to insert the connecting convex portion from the radial direction into the connecting concave portion of the connecting rotating portion, the plurality of split cores can be easily annulared by connecting each insulator after the insulator is assembled to the split core. The workability can be further improved.

The invention according to claim 8 is the stator manufacturing method according to claim 6 , wherein the insulator according to any one of claims 1 to 4 is assembled to each of the divided cores, and each of the divided cores is assembled. After the coil is wound, all the insulators constituting the stator are connected in a row, and the insulator is relatively rotated to make the plurality of divided cores into an annular shape.

In this invention, since each insulator is connected after the coil is wound, it is only necessary to hold only the divided core necessary for winding, and the coil can be wound efficiently.
According to a ninth aspect of the present invention, in the stator manufacturing method according to the sixth aspect of the present invention, the insulator according to any one of the first to fourth aspects is assembled to each of the divided cores to constitute the stator. A plurality of divided cores smaller than the number of divided cores are connected via the insulator to form a plurality of core rows, and the coils are continuously wound around the plurality of divided cores constituting each core row, All the divided cores constituting the stator by connecting the core rows are arranged in a ring shape.

  In the present invention, since the divided cores necessary for continuous winding are connected by the insulator, it is sufficient to hold the necessary number of divided cores at the time of winding, and the winding can be performed efficiently.

  Therefore, according to the above-described invention, it is possible to provide an insulator, a stator, and a method for manufacturing the stator that can improve workability.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
As shown in FIG. 1, a housing 2 of a brushless motor 1 (rotary electric machine) is formed in a cylindrical shape, and a stator 3 is disposed in the housing 2. Inside the stator 3, a rotor 4 (shown by an alternate long and short dash line in the drawing) having a magnet (not shown) arranged to face the stator 3 is supported by a rotating shaft (not shown).

The stator 3 includes a stator core 7 that is insulated from the coil 6 by an insulator 5.
Stator core 7 includes a plurality of teeth 8 that are provided radially and on which coil 6 is wound, and an annular portion 9 that connects the radially outer ends of the teeth 8. In the present embodiment, twelve teeth portions 8 are formed at equiangular (30 degree) intervals. A single tooth portion 8 is shown below FIG.

  The stator core 7 includes a plurality of (in this embodiment, 12) divided cores 10 each having one tooth portion 8. The divided cores 10 are in contact with each other at the circumferential end portion of the divided core annular portion 11 formed in an arc shape extending from the tooth portion 8 to both sides in the circumferential direction. The split core 10 is formed by laminating thin plate-like members each including a split core annular portion 11 and a tooth portion 8. In addition, the edge part of the division | segmentation core annular part 11 of the member to be laminated | stacked is formed in the circular arc convex shape or circular arc concave shape which has an arc center on the cyclic | annular part 9. FIG. Then, the rotation of the split cores 10 is guided by arcs formed at these end portions.

  The insulator 5 is composed of a plurality of insulator members 12 (the number corresponding to the above-described divided core 10, which is 12 in this embodiment) having a shape corresponding to the divided core 10. Each insulator member 12 constitutes an insulator for each divided core 10. The insulator member 12 is made of an insulating resin material.

  Each insulator member 12 has a connecting rotation portion 13 at both ends in the circumferential direction. The connecting rotation unit 13 connects the adjacent insulator members 12 to each other and allows relative rotation along the axis orthogonal plane between the adjacent insulator members 12.

  In the two connection rotation parts 13 that connect the adjacent insulator members 12, one connection rotation part 13 has a protrusion (connection protrusion 44) protruding in the axial direction as a rotation axis, and the other connection The rotation part 13 has a recessed part (connecting recessed part 54) recessed in the axial direction. By inserting the convex portion into the concave portion, the insulator members 12 are rotatably connected.

  In this embodiment, the insulator member 12 includes a first insulator member 40 (see FIGS. 2 (a), 3 (a), and (b)) having a connecting convex portion 44, and a second insulator member 50 (having a connecting recess). 2 (b), 4 (a) and 4 (b)) are alternately arranged in the circumferential direction.

  2A is a partial perspective view of the first insulator member 40, FIG. 3A is a plan view of the first insulator member 40 viewed from the lower side in the axial direction, and FIG. 3B is a first insulator member. It is the side view which looked at 40 from the radial direction outer side.

  The 1st insulator member 40 has the teeth coating | coated part 41 which coat | covers the teeth part 8 (refer FIG. 1), and the cyclic | annular coating | coated part 42 extended from the teeth coating | coated part 41 to the circumferential direction both sides.

  The teeth covering portion 41 is formed in a substantially U shape when viewed from the radial direction, and covers one axial surface of the teeth portion 8 and both circumferential side surfaces of the teeth portion 8. Further, a flange portion 41 a that prevents the coil 6 from protruding inward in the radial direction is formed at the tip end portion (radial inner end portion) of the teeth covering portion 41.

  The annular covering portion 42 is formed with an inner peripheral covering portion 42a that covers the inner peripheral side of the split core annular portion 11 (see FIG. 1) and a protruding portion 42b that protrudes in the axial direction from the inner peripheral covering portion 42a. ing. The protrusion 42b serves to prevent the coil 6 from protruding outward in the radial direction.

  At both end portions in the circumferential direction of the annular covering portion 42, connection rotating portions 43 are formed. The connecting rotation portion 43 is formed within the radial width of the annular portion 9 shown in FIG. 1, and its circumferential end surface 43a is formed in an arc shape less than a semicircle that expands outward in the circumferential direction. Further, a connecting convex portion 44 is formed on an opposing surface 43b facing the adjacent connecting turning portion 13 (connecting turning portion 53) (see FIG. 1) in the axial direction.

  As shown in FIG. 2A and FIG. 3A, the connecting convex portion 44 is formed in a cylindrical shape and protrudes from the connecting rotating portion 43 in the axial direction. The circumferential end surface 43 a of the connecting rotation portion 43 is a surface formed along an arc centered on the axial center of the cylindrical connecting convex portion 44.

  An insertion groove 42c through which the winding start terminal wire 6a of the coil 6 is inserted is formed on one side in the circumferential direction of the projecting portion 42b in the annular covering portion 42 (on the left side in FIG. 2 (a)). On the other hand (on the right side in FIG. 2A), a holding groove 45 is formed for holding the winding end terminal wire 6b of the coil 6 during the annular forming step of the split core 10. The insertion groove 42c and the holding groove 45 are formed along the radial direction, and are formed so as to open in one of the axial directions (upward in FIG. 2A).

  The holding groove 45 includes a pair of side wall portions 61 and 62 that are opposed to each other in the circumferential direction, and a bottom portion 63 that is formed at one axial end portion (lower end portion) of the holding groove 45. The winding end terminal wire 6b of the coil 6 can be held. One of the pair of side wall portions 61, 62 (side wall portion 61) is formed so as to extend in the radial direction from the annular covering portion 42, and the other side wall portion 62 is formed on the circumferential end surface of the connecting rotation portion 43. Is formed. In addition, the radial direction dimension of each side wall part 61 and 62 is mutually formed equally.

  The side wall 61 is formed with a locking projection 64 that protrudes toward the opposing side wall 62. The locking protrusion 64 has a rectangular shape when viewed from the protruding direction (circumferential direction) (see FIG. 6). The locking projection 64 is formed at the upper end portion (insertion side end portion) of the side wall portion 61 and at the radially outer end portion of the side wall portion 61. That is, the locking protrusion 64 is formed at a position outside the center in the radial direction in the holding groove 45. Further, as shown in FIG. 3B, a taper portion 64a as a second inclined portion is formed on the end surface on the axial bottom portion 63 side (end surface on the non-insertion side) of the locking projection 64. The locking protrusion 64 is formed so that the dimension in the vertical direction (axial direction) becomes smaller as it goes to the tip.

  A curved portion 62a as a first inclined portion for guiding the winding end terminal line 6b into the holding groove 45 is formed at the upper end portion of the side wall portion 62 on the side where the locking projection 64 is not formed. The curved portion 62 a is curved so as to be separated from the locking projection 64 toward the upper end of the side wall portion 62. Accordingly, the upper end portion (insertion opening) of the holding groove 45 is shaped so as to expand. When the winding end terminal wire 6b is inserted into the holding groove 45, the winding end terminal wire 6b is guided by the curved portion 62a, and the holding groove It is easy to insert into 45.

  Further, the curved portion 62a and the tapered portion 64a of the locking projection 64 are opposed to each other in the circumferential direction and are substantially parallel to each other. As a result, an introduction path is formed between the curved portion 62a and the taper portion 64a of the locking projection 64 to introduce the winding end terminal line 6b into the holding groove 45 (on the bottom 63 side of the locking projection 64). Has been. Here, since the taper part 64a is formed in the lower end surface of the latching protrusion 64, when passing the winding end terminal line 6b between the taper part 64a and the curved part 62a, the winding end terminal line 6b is It is suppressed that it catches on the latching protrusion 64. For this reason, the winding end terminal wire 6 b can be easily inserted into the holding groove 45. Further, after inserting the winding end terminal wire 6b into the holding groove 45, the winding end terminal wire 6b is urged upward by its own elastic force, and the taper portion 64a and the curved portion 62a of the locking projection 64 It is easy to be stabilized in the sandwiched state (the state shown in FIG. 3B).

  Further, since the locking protrusion 64 is formed at a position outside the center in the radial direction in the holding groove 45 as described above, the winding end terminal line 6b can be suitably held in the holding groove 45. It has become. Moreover, since the latching protrusion 64 is formed in a part of radial direction in the holding groove 45, compared with the case where the latching protrusion 64 is formed over the entire radial direction of the holding groove 45, the winding end terminal. The wire 6b can be easily inserted into the holding groove 45.

Next, the second insulator member 50 will be described.
The second insulator member 50 is different from the first insulator member 40 in the configuration of the connecting rotation portion 53. Accordingly, the following description will be made with the connection rotation portion 53 as the center, and the same components as those of the first insulator member 40 will be denoted by the same reference numerals and detailed description thereof will be omitted.

  2B is a partial perspective view of the second insulator member 50, FIG. 4A is a plan view of the second insulator member 50 viewed from the lower side in the axial direction, and FIG. 4B is a second insulator member. It is the side view which looked at 50 from the radial direction outer side.

  The connection rotation part 53 of the 2nd insulator member 50 is formed in the radial direction width | variety of the cyclic | annular part 9 shown in FIG. Further, a connecting concave portion 54 is formed on the facing surface 53b facing the adjacent connecting rotating portion 13 (connecting rotating portion 43) (see FIG. 1) in the axial direction.

  As shown in FIGS. 2B and 4A, the connecting recess 54 is a hole that is formed in a substantially circular shape in the axial direction and penetrates the connecting rotation portion 53 in the axial direction. The connection recessed part 54 is formed so that the connection convex part 44 can be freely inserted. That is, the inner diameter of the connecting concave portion 54 is formed larger than the outer diameter of the connecting convex portion 44.

  Furthermore, the connection recessed part 54 has the opening part 54a opened to a radial direction outer side. Therefore, the connecting rotation part 53 is formed in a substantially C shape in the axial direction. The opening width in the circumferential direction of the opening 54a is set to be smaller than the diameter of the connecting projection 44 formed in a columnar shape. Accordingly, the opening 54a is difficult for the connecting projection 44 inserted into the connecting recess 54 to come out of the opening 54a.

  The connecting rotation portion 53 is formed with a thin portion 55 in which the thickness between the outer peripheral surface 53 a and the inner peripheral surface of the connecting recess 54 is partially reduced. In addition, a groove 54 b extending along the axial direction is formed on the inner peripheral surface of the connecting recess 54. At least one of the thin wall portion 55 and the groove 54b is formed so that the connecting rotation portion 53 is elastically deformed and the tip portion 56 swings along a plane orthogonal to the insulator axis.

  When the connecting convex portion 44 of the first insulator member 40 is pressed from the radially outer side (in the direction of the arrow Ya shown in FIG. 4A) against the connecting concave portion 54 of the connecting rotating portion 53 configured in this way, the thin wall The tip 56 is swung by at least one of the portion 55 and the groove 54 b, the opening width in the circumferential direction of the opening 54 a is widened, and the connecting convex portion 44 enters the connecting concave portion 54. That is, the first insulator member 40 and the second insulator member 50 are coupled by inserting the coupling convex portion 44 into the coupling concave portion 54 from the radially outer side. Since the cylindrical connection convex portion 44 is loosely inserted into the substantially circular connection concave portion 54, the first insulator member 40 and the second insulator member 50 can rotate relative to each other.

  Further, since the opening width in the circumferential direction of the opening 54a formed in the connecting rotation portion 53 is set to be smaller than the diameter of the connecting convex portion 44, the connecting convex portion 44 extends radially outward from the opening 54a. It is prevented from coming out. It should be noted that by moving the first insulator member 40 formed with the connecting convex portion 44 against the elastic force of the connecting rotating portion 53 toward the radially outer side, the connecting rotating portion 53 is bent and the tip portion 56 is bent. By swinging, the opening 54 a is widened and can be extracted from the connecting recess 54.

Next, the assembly of the stator 3 will be described.
(First assembly example)
The first insulator member 40 or the second insulator member 50 is assembled to the divided core 10 (see FIG. 1) from the stacking direction, and the divided core 10 (hereinafter referred to as the first divided core) is assembled with the first insulator member 40. 10a) and the split core 10 (hereinafter referred to as the second split core 10b) assembled with the second insulator member 50.

  Next, the coil 6 is wound around each of the first divided core 10a and the second divided core 10b. At this time, the winding end terminal wire 6b of the coil 6 is inserted into the holding groove 45 and is locked to the locking protrusion 64 of the holding groove 45 (see FIG. 6). Thereby, the volume end terminal line 6b is temporarily fixed. And the connection convex part 44 of the 1st division | segmentation core 10a is inserted in the connection recessed part 54 of the 2nd division | segmentation core 10b from a radial direction outer side, and the 1st division | segmentation core 10a and the 2nd division | segmentation core 10b are connected. Then, a series of core arrays (see FIG. 5) in which the six first divided cores 10a and the six second divided cores 10b are alternately connected are generated. At this time, the winding end terminal line 6 b of each coil 6 is kept temporarily fixed to the locking protrusion 64 of the holding groove 45.

  Thereafter, the first divided core 10a and the second divided core 10b are relatively rotated to form the core row into an annular shape, and then the first divided core 10a and the second divided core 10b at both ends of the core row are connected. . As a result, an annular stator 3 is obtained as shown in FIG. The winding end terminal wire 6b of the coil 6 is removed from the holding groove 45 and is electrically connected to a terminal (not shown) together with the winding start terminal wire 6a of the coil 6. The brushless motor 1 is obtained by inserting the stator 3 into the housing 2 and disposing the rotor 4 inside the stator 3.

(Second assembly example)
The first insulator member 40 or the second insulator member 50 is assembled to the divided core 10 (see FIG. 1) from the stacking direction, and the divided core 10 (hereinafter referred to as the first divided core) is assembled with the first insulator member 40. 10a) and the split core 10 (hereinafter referred to as the second split core 10b) assembled with the second insulator member 50. Then, as in the first assembly example, a series of core arrays in which six first divided cores 10a and six second divided cores 10b are alternately connected are generated. The coil 6 is sequentially wound around the first divided core 10a and the second divided core 10b in this core row. At this time, similarly to the first assembling example, the winding end terminal wire 6b of the coil 6 is inserted into the holding groove 45 and locked to the locking protrusion 64 of the holding groove 45. Then, after the first divided core 10a and the second divided core 10b are relatively rotated to form the core row into an annular shape, the first divided core 10a and the second divided core 10b at both ends of the core row are connected. . As a result, an annular stator 3 is obtained as shown in FIG. As in the first assembly example, the winding end terminal wire 6b of the coil 6 is removed from the holding groove 45 and is electrically connected to a terminal (not shown) together with the winding start terminal wire 6a of the coil 6. It is like that.

(Third assembly example)
The first insulator member 40 or the second insulator member 50 is assembled to the divided core 10 (see FIG. 1) from the stacking direction, and the divided core 10 (hereinafter referred to as the first divided core) is assembled with the first insulator member 40. 10a) and the split core 10 (hereinafter referred to as the second split core 10b) assembled with the second insulator member 50. Then, the split cores that are continuously wound are connected. For example, as shown in FIG. 7, the first conducting wire 71 constitutes V-phase coils V2 and V1 and U-phase coils U4 and U3, and the second conducting wire 72 comprises W-phase coils W3, W4 and V Phase coils V3 and V4 are configured, and the third conductive wire 73 configures U-phase coils U1 and U2 and W-phase coils W2 and W1. That is, each of the first to third conducting wires 71 to 73 is continuously wound around four teeth portions 8 that are continuous in the circumferential direction. In addition, each conducting wire 71-73 is the structure which coat | covered the metal wire which consists of an electroconductive metal material (this embodiment copper) with the insulating film.

  Two first divided cores 10a and two second divided cores 10b are alternately connected to generate a core row composed of four divided cores. Then, three sets of this core row are generated. The conducting wires 71 to 73 are wound around the three sets of core rows. At this time, the winding end terminal wires 6 b of the respective conducting wires 71 to 73 are inserted into the holding grooves 45 and are locked to the locking protrusions 64 of the holding grooves 45. Thereby, the volume end terminal line 6b is temporarily fixed. In the third assembly example, the holding groove 45 is formed only on the insulator member of the split core (the second split core 10b disposed at the end of the core row in FIG. 9) where the winding end terminal line 6b exists. It has become so. Then, the divided cores 10a and 10b are relatively rotated to form the core row in an arc shape.

  Next, as shown in FIG. 9, the core row 81 wound with the first conducting wire 71 and the core row 82 wrapped with the second conducting wire 72 are connected. Further, the core row 83 around which the third conducting wire 73 is wound is connected to the core rows 81 and 82. As a result, an annular stator 3 is obtained as shown in FIG. And the conducting wires 71-73 of each core row | line 81-83 are connected. At this time, the winding end terminal line 6b of each of the conducting wires 71 to 73 is removed from the holding groove 45 and is electrically connected to a terminal or the like (not shown) together with the winding start terminal line 6a. At this time, as shown in FIG. 8A, the U4-V1 interphase connecting wire 71a is connected to the V3-W4 interphase connecting wire 72a and the W2-U2 interphase connecting wire 73a by the connection terminals 75, respectively. As shown in FIG. 8B, the connection terminal 75 is formed so as to wrap around the connecting wire 71a and the connecting wire 72a so as to be in contact with each other. In addition, although not shown in figure, the connection terminal 75 which connects the connecting wire 71a and the connecting wire 73a shown to Fig.8 (a) is formed similarly.

  In any of the first to third assembly examples described above, the winding end terminal line 6b is locked to the locking protrusion 64 of the holding groove 45 and temporarily fixed before the step of circularizing the split core 10. It has become. For this reason, when the split core 10 is circularized, it is suppressed that the winding end terminal line 6b is loosened, and it is not necessary to hold the winding end terminal line 6b with a jig or the like, so that workability is improved. It has become.

Next, characteristic effects of the present embodiment will be described.
(1) In the present embodiment, the first and second insulator members 40, 50 are formed along the radial direction at positions radially outside the teeth covering portion 41, and the winding end terminal line 6b is formed from the axial direction. An insertable holding groove 45 is provided. Then, at a position outside the center in the radial direction in the holding groove 45, the winding end terminal line 6b inserted into the holding groove 45 is locked and the winding end terminal line 6b is detached from the holding groove 45. A locking projection 64 for suppression is provided. Thereby, the split core 10 can be annularized in a state where the winding end terminal wire 6b of the coil 6 is locked to the locking protrusion 64 of the holding groove 45, and the winding end terminal wire 6b is formed at the time of the circularization. Can be prevented from loosening. This eliminates the need to hold the winding end terminal line 6b with a jig or the like when the split core 10 is annularized, thereby improving workability. Further, since the locking projection 64 is provided at a position outside the center in the radial direction in the holding groove 45, the winding end terminal line 6 b can be suitably held in the holding groove 45.

  (2) In the present embodiment, the winding end terminal line 6b is held on at least one upper end portion (insertion side end portion) of the pair of side wall portions 61 and 62 facing the circumferential direction constituting the holding groove 45. Since the curved portion 62 a for guiding into the groove 45 is formed, the winding end terminal wire 6 b of the coil 6 can be easily inserted into the holding groove 45.

  (3) In the present embodiment, the end face on the side opposite to the insertion side of the locking projection 64 (end face on the bottom 63 side) is inclined so as to face the curved portion 62a in the circumferential direction and to be substantially parallel to the curved portion 62a. A tapered portion 64a is formed. Therefore, the taper portion 64a and the curved portion 62a of the locking projection 64 form an introduction path for introducing the coil winding end wire 6b into the holding groove 45 (opposite to the locking projection 64). The winding end terminal wire 6b can be easily inserted into the holding groove 45. In addition, after the winding end terminal line 6b is inserted into the holding groove 45, the winding end terminal line 6b is easily stabilized in a state where it is sandwiched between the tapered portion 64a and the curved portion 62a of the locking projection 64.

  (4) In this embodiment, the connection rotation part 53 formed in the circumferential end of the second insulator member 50 has an opening 54a that opens in the radial direction, and the circumferential width of the opening 54a is the same. It has the connection recessed part 54 formed so that expansion was possible. The connecting convex portion 44 is inserted into the connecting concave portion 54 from the opening 54a. That is, by inserting the connecting convex portion 44 formed on the first insulator member 40 from the radially outer side into the connecting concave portion 54 of the second insulator member 50, the first insulator member 40 has a diameter on the second insulator member 50. Connect in the direction. Accordingly, after the first insulator member 40 and the second insulator member 50 are mounted on the split core 10, respectively, the two insulator members 40 and 50 can be connected to each other. Therefore, workability can be improved.

  (5) In the present embodiment, the connecting convex portion 44 is formed into a columnar shape, whereby the outer diameter of the connecting convex portion 44 can be increased, and the strength of the connecting convex portion 44 is improved, thereby the first insulator. The connection retention between the member 40 and the second insulator member 50 can be improved. Moreover, since the connection recessed part 54 is made into C shape by axial view, the outer diameter of the connection convex part 44 can be enlarged.

  (6) The connection rotation part 43 which has the connection convex part 44 in the circumferential direction both ends of the 1st insulator member 40 is formed, and the connection rotation part 53 which has the connection recessed part 54 in the circumferential direction both ends of the 2nd insulator member 50. Is formed. And the 1st insulator member 40 and the 2nd insulator member 50 are connected alternately. Therefore, since only two types of insulator members 40 and 50 need be prepared, the number of parts can be reduced. In addition, since it is not necessary to make a determination such as assembling an insulator that does not have a connecting rotation part at the end, it is possible to improve workability.

  (7) In the present embodiment, the first insulator member 40 and the second insulator member 50 correspond to various assembling methods such as connecting a necessary number of insulator members before and after winding. Therefore, the degree of freedom of work can be increased.

  (8) In this embodiment, after the coil 6 is wound around each of the divided cores 10a and 10b, the insulator members 40 and 50 are connected. Moreover, after producing | generating the core row | line 81-83 which connected several insulator members 40 and 50 wound continuously, and winding the coil 6 (conductor 71-73) to each core row | line 81-83, each core Columns 81-83 are connected. In this way, since it is sufficient to hold only the necessary split core during winding, the winding of the winding around the split core can be easily performed.

  (9) In the present embodiment, it is possible to select to insert the connecting convex portion 44 from the radial direction and to insert the connecting convex portion 44 from the axial direction with respect to the connecting concave portion 54. For this reason, for example, depending on the lamination thickness of the split core, a method of inserting from the radial direction is selected when the lamination thickness is large, and a method of inserting from the axial direction is selected when the lamination thickness is small, etc. The operation according to the shape of the split core can be selected.

In addition, you may change embodiment of this invention as follows.
In the above embodiment, for example, as shown in FIG. 10, the holding protrusion 65 may be formed in the holding groove 45 separately from the locking protrusion 64. In the example shown in FIG. 10, the holding projection 65 is located on the bottom 63 side (the anti-insertion side) of the side wall portion 61 with respect to the locking projection 64 and is shifted in the radial direction from the locking projection 64. Is formed. When the winding end terminal wire 6b of the coil 6 is temporarily fixed, the locking projection 64 holds the upper side (insertion side) of the winding end terminal wire 6b, and the holding projection 65 is below the winding end terminal wire 6b. Is supposed to hold. According to such a configuration, the winding end terminal wire 6b of the coil 6 inserted into the holding groove 45 is held from both sides in the axial direction by the locking projection 64 and the holding projection 65, and therefore the winding end terminal wire 6b. Can be held stably. In the example shown in FIG. 10, the holding projection 65 is provided on the side wall portion 61 on the same side as the locking projection 64, but may be provided on the opposite side wall portion 62.

  In the example shown in FIG. 10, the arrangement of the locking projection 64 and the holding projection 65 is such that the angle θ1 with respect to the horizontal plane of the straight line connecting them is from the position where the winding end terminal wire 6b is drawn from the coil 6 to the holding projection 65. Is set to be smaller than an angle θ2 of the portion (leading line 6c) with respect to the horizontal plane. Thereby, it becomes possible to hold | maintain suitably the winding end terminal wire 6b of a coil with a latching protrusion and a holding | maintenance protrusion.

  In the above embodiment, the locking protrusion 64 is provided on the side wall portion 61 on the protruding portion 42b side of each insulator member 40, 50, but the side wall portion on the connection rotation portion 43 (or connection rotation portion 53) side. 62 may be provided.

In the above embodiment, the locking protrusion 64 is formed on a part of the side wall 61 in the radial direction, but may be formed over the entire radial direction.
In the above embodiment, only one locking protrusion 64 is provided, but the present invention is not limited to this, and two or more locking protrusions 64 may be provided.

-In above-mentioned embodiment, although the latching protrusion 64 made rectangular shape seeing from the protrusion direction, it is good also as circular shape other than this, for example.
-In above-mentioned embodiment, although the curved part 62a was formed only in the side wall part 62 by the side of the connection rotation part 43 (or connection rotation part 53), not only this but the side wall part 61 by the side of the protrusion part 42b is formed. Or may be provided only on the side wall portion 61.

  In the above embodiment, the curved portion 62a is formed as the first inclined portion and the tapered portion 64a is formed as the second inclined portion. However, for example, the first inclined portion may be formed in a tapered shape. Further, the second inclined portion may be formed in a curved shape.

  In the above embodiment, the stator core 7 is composed of 12 divided cores 10, but may be changed to a stator core composed of other number of divided cores. Of course, in this case, the number of the first and second insulator members 40 and 50 also needs to be changed.

  In the above embodiment, the insulator 5 is formed by alternately disposing the insulator members 12 having only the connecting convex portions 44 or the connecting concave portions 54 at both ends thereof. However, it is also possible to configure the insulator member from an insulator member provided with the connecting convex portion 44 at one end and the connecting concave portion 54 at the other end. In this case, an odd number of insulator members are connected in a ring shape, that is, a stator having an odd number of teeth portions 8 can be configured.

  In the above embodiment, the connecting recess 54 is a hole penetrating in the axial direction. However, it is not always necessary to penetrate. For example, the connecting recess 54 may have a bottom.

Sectional drawing of a motor. (A) (b) is a perspective view of an insulator. (A) The top view seen from the axial direction lower side of the insulator, (b) The side view seen from the radial direction outer side. (A) The top view seen from the axial direction lower side of the insulator, (b) The side view seen from the radial direction outer side. The top view before circularization of a split core. Schematic which shows the volume end terminal line of a temporarily fixed state. Coil connection diagram. (A) Explanatory drawing of a connecting wire, (b) Sectional drawing of a connection terminal part. Explanatory drawing of the assembly | attachment of an insulator. Schematic which shows the holding groove of another example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Brushless motor as a rotary electric machine, 3 ... Stator, 5 ... Insulator, 6 ... Coil, 6a ... Winding end terminal wire, 6b ... Winding end terminal wire, 7 ... Stator core, 8 ... Teeth part, 9 ... Ring part, 10 ... split core, 10a ... first split core, 10b ... second split core, 11 ... split annular part, 12, 40, 50 ... insulator member, 13, 43, 53 ... connecting rotation part, 41 ... teeth covering part, 42 ... annular covering portion, 44 ... connecting convex portion, 45 ... holding groove, 53a ... outer peripheral surface, 54 ... connecting concave portion, 54a ... opening portion, 61, 62 ... side wall portion, 62a ... curved portion as a first inclined portion, 64... Locking projection, 64 a... Tapered portion as the second inclined portion, 65... Holding projection, 81 to 83.

Claims (9)

Electrically connected to a plurality of divided cores arranged in a ring and constituting a stator of a rotating electrical machine, and wound around a tooth portion provided on the divided cores so as to extend radially inward. An insulator for electrical insulation,
A teeth covering portion that covers at least a part of the teeth portion of the split core, and a winding end terminal line of the coil that is formed along the radial direction at a position radially outward from the teeth covering portion can be inserted from the axial direction. Holding grooves,
In a position outside the center in the radial direction in the holding groove, it is locked with the winding end terminal line inserted into the holding groove to suppress separation of the winding end terminal line from the holding groove. A locking projection is provided ,
A first inclined portion for guiding the winding end terminal line of the coil into the holding groove is formed at one of the insertion side end portions of the pair of side wall portions facing in the circumferential direction constituting the holding groove. And
The locking projection is provided on the other side of the pair of side wall portions, and the end surface of the locking projection on the opposite side to the insertion side is opposed to the first inclined portion in the circumferential direction and substantially the same as the first inclined portion. An insulator characterized in that a second inclined portion that is inclined so as to be parallel is formed . Electrically connected to a plurality of divided cores arranged in a ring and constituting a stator of a rotating electrical machine, and wound around a tooth portion provided on the divided cores so as to extend radially inward. An insulator for electrical insulation,
A teeth covering portion that covers at least a part of the teeth portion of the split core, and a winding end terminal line of the coil that is formed along the radial direction at a position radially outward from the teeth covering portion can be inserted from the axial direction. Holding grooves,
In a position outside the center in the radial direction in the holding groove, it is locked with the winding end terminal line inserted into the holding groove to suppress separation of the winding end terminal line from the holding groove. A locking projection is provided,
In the holding groove, a holding projection is formed at a position on the side opposite to the insertion side than the locking projection and shifted in the radial direction from the locking projection,
The insulator, wherein the locking protrusion and the holding protrusion are configured to be able to hold a winding end terminal wire of the coil inserted into the holding groove from both sides in the axial direction. Insulator according to claim 2 ,
In the holding groove, the holding projection is formed at a position shifted inward from the locking projection in the radial direction,
The arrangement of the locking protrusion and the holding protrusion is such that an angle formed by a straight line connecting the locking protrusion and the holding protrusion with respect to a horizontal plane extending radially outward from the holding protrusion is from the coil in the winding end terminal line. An insulator, wherein the insulator is set to be smaller than an angle formed by a portion from the coil drawing end point to the holding projection in the winding end terminal line with respect to a horizontal plane extending radially outward from the drawing point . Electrically connected to a plurality of divided cores arranged in a ring and constituting a stator of a rotating electrical machine, and wound around a tooth portion provided on the divided cores so as to extend radially inward. An insulator for electrical insulation,
A teeth covering portion that covers at least a part of the teeth portion of the split core, and a winding end terminal line of the coil that is formed along the radial direction at a position radially outward from the teeth covering portion can be inserted from the axial direction. Holding grooves,
In a position outside the center in the radial direction in the holding groove, it is locked with the winding end terminal line inserted into the holding groove to suppress separation of the winding end terminal line from the holding groove. A locking projection is provided,
The adjacent insulator has a connecting projection extending in the axial direction,
At the circumferential end, it has a connecting rotation part that is connected to an insulator that covers the adjacent divided core and allows a relative connecting rotation;
The connection rotation part has an opening part that opens in a radial direction, and is formed so that a circumferential width of the opening part can be expanded, and has a connection concave part into which the connection protrusion part can be inserted. ,
The connecting convex portion is formed in a cylindrical shape,
The connecting rotation portion is formed such that a space between an inner peripheral surface of the concave portion and an outer peripheral surface of the connection rotating portion is thin, and a tip of the connecting rotation portion is formed to be swingable. An insulator formed to be insertable. By connecting the insulator according to claim 1 by arranging a plurality of the split cores annularly, wherein the benzalkonium such a coil through an insulator to the respective split cores are wound And stator. A method of manufacturing a stator in which a plurality of divided cores are annularly arranged by connecting insulators that respectively cover a plurality of divided cores, and a coil is wound around each divided core via an insulator,
The insulator according to any one of claims 1 to 4 is assembled to each of the divided cores, the coil is wound around each of the divided cores, and a winding end terminal wire of the coil is formed in the holding groove of the insulator. A stator manufacturing method, wherein the stator is inserted and locked to the locking protrusion in the holding groove, and the plurality of divided cores are annularized in that state. In the manufacturing method of the stator according to claim 6 ,
The insulator according to any one of claims 1 to 4 is assembled to each of the divided cores, and all the insulators constituting the stator are connected in a line, and then the coils are wound around the divided cores. A method of manufacturing a stator, wherein the insulator is rotated relative to each other to annularly form the plurality of divided cores. In the manufacturing method of the stator according to claim 6 ,
After assembling the insulator according to any one of claims 1 to 4 to each of the divided cores, winding the coil around each of the divided cores, and then connecting all the insulators constituting the stator in a row. A method of manufacturing a stator, wherein the insulator is rotated relative to each other to annularly form the plurality of divided cores. In the manufacturing method of the stator according to claim 6 ,
The insulator according to any one of claims 1 to 4 is assembled to each of the split cores, and a plurality of split cores smaller than the number of the split cores constituting the stator are connected via the insulator. A plurality of divided cores constituting each core row are continuously wound, and the plurality of divided cores constituting the stator are annularly arranged by connecting the plurality of core rows. A method for manufacturing a stator.

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