JP2010239826A - Motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor capable of reliably securing a winding end of a coil. <P>SOLUTION: In an insulator 8 used for a motor, a coil guide recess 864 is formed so as to leave a coil tangling protrusion 863 between a coil tangling first groove 861 and a coil tangling second groove 862. With this configuration, the winding end 62 of a coil 6 can be hooked on the coil tangling protrusion 863 from a coil winding portion 80 through the coil tangling first groove 861, the coil guiding recess 864 and the coil tangling second groove 862. Thus, since the winding end 62 of the coil 6 is reliably fixed, the coil 6 can be prevented from being unwound. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a motor in which a drive coil is wound around each of a plurality of salient poles arranged in a circumferential direction in a stator core via an insulator.

  The motor includes a stator in which a coil is wound around each of a plurality of salient poles arranged in the circumferential direction in the stator core, and a rotor that is disposed with respect to the stator via a gap. Here, the steer core may be configured by arranging a plurality of divided cores in a cylindrical shape (see Patent Document 1). Moreover, a some core may be comprised as a connection core connected via the insulator, and also in this structure, a connection core is made into a cylindrical shape and a stator is comprised.

  In either case, after winding the coil, the coil will be unwound if the winding end portion is not fixed. In view of this, a configuration has been proposed in which a slit is provided in an insulator and a winding end portion is held by the slit (see Patent Document 1).

JP-A-9-322439

  However, as described in Patent Document 1, there is a problem that the winding end portion cannot be reliably fixed only by holding the winding end portion with the slit provided in the insulator, and the coil is unwound.

  In view of the above problems, an object of the present invention is to provide a motor that can reliably fix a winding end portion of a coil.

  In order to solve the above problems, in the present invention, a stator core having a plurality of salient poles protruding radially inward from an annular core portion, an insulator covering a side end portion in the axial direction of the stator core, and via the insulator, In a motor having a cylindrical stator provided with a drive coil wound around a salient pole, and a rotor provided with a permanent magnet opposed to the tip of the salient pole via a gap, the insulator includes: A coil winding portion, and an outer peripheral side covering portion that overlaps the annular core portion on the outer side in the radial direction with respect to the coil winding portion. A first coil winding groove and a second coil winding groove that connect the outer peripheral side covering portion to the radially outer side of the outer peripheral side covering portion are formed in parallel, The coil A coil guide that connects the coil winding first groove and the coil winding second groove so as to leave a coil winding convex part between the first winding coil groove and the second coil winding groove. The coil winding end is passed from the coil winding portion to the coil winding first groove, the coil guide recess, and the coil winding second groove. Features.

  In the present invention, the coil guide concave portion is formed in the insulator so as to leave the coil binding convex portion between the coil winding first groove and the coil binding second groove, and the coil winding end is completed. The portion passes from the coil winding portion to the first coil winding groove, the coil guide recess, and the second coil winding groove. For this reason, since the winding end part of the coil is securely fixed, the coil is not unwound.

  In the present invention, in the coil binding convex portion, the wall portion facing the coil guide concave portion has a root portion located radially inwardly recessed in an axial direction from an outer peripheral end portion located radially outward. It is preferable. According to such a configuration, the winding end portion of the coil is securely fixed to the root side of the coil binding convex portion, so that the winding end portion of the coil does not protrude radially outward.

  In the present invention, the outer circumferential side of the outer circumferential side covering portion has a depth dimension equal to or greater than the depth of the coil guide concave portion and a width dimension equal to or greater than the width dimension of the coil binding convex portion. It is preferable that a groove-like recess extending from the inner edge in the axial direction of the covering portion to the coil guide recess is formed. When such an arrangement is adopted, when the insulator is manufactured by die molding, a mold for forming the first coil winding groove and the second coil winding groove, and a mold for forming the coil guide recess and the groove recess. Since it suffices to provide the mold so as to face the mold, there is no need to use an expensive mold such as a slide mold.

  In this invention, it is preferable that the said coil is wound to the position which contact | connects at least one part of the part located in the radial inside with respect to the said coil binding convex part in the said outer peripheral side coating | coated part. According to such a configuration, since the outer peripheral covering portion is supported by the coil, even if the coil winding end portion is passed through the first coil winding groove, the coil guide recess, and the second coil winding groove, The outer peripheral side covering portion does not bend toward the coil winding portion.

  In the present invention, the coil winding portion and the radially outer side of the outer peripheral side covering portion are connected to the outer end surface in the axial direction of the outer peripheral side covering portion so that the winding start portion of the coil is connected to the outer peripheral side covering portion. It is preferable that a coil introduction groove that leads to the coil winding portion from the radially outer side is formed. According to this configuration, the coil can be wound by hooking the coil winding start portion to the coil introduction groove.

  In the present invention, the coil guide concave portion is formed in the insulator so as to leave the coil binding convex portion between the coil winding first groove and the coil binding second groove. The end portion is passed from the coil winding portion to the first coil winding groove, the coil guide recess, and the second coil winding groove. For this reason, since the winding end part of the coil is securely fixed, the coil is not unwound.

(A), (b) is the longitudinal cross-sectional view of the motor to which this invention is applied, and explanatory drawing which shows a mode that the coil is wound through the insulator. It is explanatory drawing of the insulator used for the motor to which this invention is applied. It is explanatory drawing when the insulator used for the motor to which this invention is applied is seen from each direction. It is explanatory drawing which shows a mode that the insulator used for the motor to which this invention is applied is shape-molded. It is explanatory drawing which shows a mode that an insulator is fixed with a cover member in the motor to which this invention is applied.

  An inner rotor type motor will be described below as a motor to which the present invention is applied with reference to the drawings.

(General configuration of motor)
FIG. 1A and FIG. 1B are a longitudinal sectional view of a motor to which the present invention is applied and an explanatory view showing a state in which a coil is wound through an insulator. In addition, in FIG.1 (b), illustration of a stator core is shown typically.

  In FIG. 1A, the motor 1 of this embodiment is a three-phase inner rotor type DC brushless motor, and is a bottomed cylindrical motor with one end (output side) in the motor axial direction L being an open end. It has a case 2, a cylindrical stator 4 fixed to the inside of the motor case 2 by a method such as shrink fitting, and a rotor 7 provided inside the stator 4. The rotor 7 includes a rotating shaft 70 extending in the motor axial direction L, and a rotor magnet 75 (permanent magnet) fixed to the outer peripheral surface of the rotating shaft 70. The rotary shaft 70 is rotatably supported by the first bearing 76 on the output side and the second bearing 77 on the non-output side. The first bearing 76 is held by the flange-shaped bearing holder 20 held by the motor case 2, and the second bearing 77 is held by the small diameter portion 26 formed at the bottom of the motor case 2. In this embodiment, the bearing holder 20 is used as a lid member that closes the open end of the motor case 2. The stator 4 includes a stator core 5 in which a plurality of divided cores 50 are annularly arranged in the circumferential direction, insulators 8 and 9 covering both ends of the plurality of divided cores 50, and a groove-like coil winding of the insulators 8 and 9. A plurality of coils 6 for three phases wound around the salient poles 51 of the stator core 5 through the portion 80 are provided. The insulators 8 and 9 are made of a synthetic resin made of polybutylene terephthalate, polyphenylene sulfide, or the like, and glass fibers may be blended as necessary.

  As schematically shown in FIG. 1B by a broken line, a part of the split core 50 is composed of a laminated core in which a plurality of magnetic plates are stacked in the motor axial direction L, and protrudes in the radial direction. The pole 51 and the outer peripheral side arc part 53 extended from the outer peripheral side edge part of the salient pole 51 to the both sides of the circumferential direction are provided. The salient pole 51 includes an inner circumferential arc portion 52 extending from the inner circumferential end to both sides in the circumferential direction. As a result of the plurality of divided cores 50 being arranged in the circumferential direction, the side end portions of the outer circumferential arc portion 53 adjacent in the circumferential direction are connected to each other, and the outer circumferential arc portion 53 connects the annular core portion 530 of the stator 4. Constitute. For this reason, the stator core 5 has a structure in which a plurality of salient poles 51 project radially inward from the annular core portion 530. The stator core 5 has a tip end (inner circumferential arc portion 52) and FIG. The rotor magnet 75 shown in a) is opposed via a gap.

  As shown in FIG. 1A, in the motor 1 of this embodiment, when power is supplied to the plurality of coils 6, a power supply member holder 69 made of a disk-shaped resin molded product and a power supply held by the power supply member holder 69. A member 68 is used.

  In this embodiment, the output-side insulator 8 and the counter-output-side insulator 9 have the same configuration. In the following description, an example in which the present invention is applied to the output-side insulator 8 will be described. . Further, in this embodiment, the cover member 3 is provided between the power supply member holder 69 and the bearing holder 20 on the opposite side (axial direction outer side) to the side on which the stator core 5 is located with respect to the output-side insulator 8. ing.

(Configuration of insulator 8)
FIG. 2 is an explanatory view of an insulator 8 used in the motor 1 to which the present invention is applied. FIGS. 2A and 2B are a perspective view of the insulator 8 as viewed obliquely from the upper side (output side), and the insulator, respectively. It is the perspective view which looked at 8 from diagonally downward (counter output side). FIG. 3 is an explanatory diagram when the insulator 8 used in the motor 1 to which the present invention is applied is viewed from each direction, and FIGS. 3 (a), (b), (c), (d), (e) A plan view of the insulator 8 viewed from the output side, a bottom view of the insulator 8 viewed from the non-output side, a front view of the insulator 8 viewed from the outside in the radial direction, a right side view of the insulator 8 viewed from the right side in the circumferential direction, and A- It is A 'sectional drawing. FIG. 4 is an explanatory view showing a state where the insulator 8 used in the motor to which the present invention is applied is molded.

  As shown in FIGS. 1B, 2, and 3, the insulator 8 includes a salient pole surface covering portion 82 that covers a portion of the salient pole 51 that extends in the radial direction, and an inner peripheral side of the salient pole 51. An inner peripheral covering portion 81 that covers the arc portion 52 and an outer peripheral covering portion 83 that covers the outer peripheral arc portion 53 (annular core portion 530) are provided. The insulator 8 protrudes from the projecting extreme surface covering portion 82 to the opposite output side in the motor axial direction L to cover the side surface of the salient pole 51, and from the inner peripheral covering portion 81 to the motor axial direction L. Projecting to the opposite output side in the motor axial direction L from the outer peripheral side covering portion 83 and the inner peripheral side arc portion covering portion 871 covering the radially outer surface of the inner peripheral arc portion 52. And an outer circumferential arc portion covering portion 873 that covers the radially inner surface of the arc portion 53. The salient pole side surface covering portion 872 and the outer circumferential side arc portion covering portion 873 are both thin plates. When viewed from the motor axial direction L, the inner circumferential arc portion covering portion 871 has a substantially triangular shape with the bottoms facing both ends in the circumferential direction.

  In this embodiment, on the radially outer surface of the outer peripheral side covering portion 83 of the insulator 8, an engaging convex portion 89 protruding outward in the radial direction is formed at the upper end edge of the central portion excluding both end portions in the circumferential direction. Has been. Further, in the outer peripheral side covering portion 83, the axial outer end surface 830 opposite to the side where the stator 4 is located in the motor axis L direction extends in the circumferential direction over the angular range in which the engagement convex portion 89 is formed. An existing elasticity imparting groove 835 is formed. The elasticity applying groove 835 is connected to a coil winding first groove 861 to be described later, the upper half of the outer peripheral side covering portion 83, the radially outer portion 832 in which the engagement convex portion 89 is formed, and the coil winding. It is divided into a radially inner portion 831 facing the turning portion 80. Here, the elasticity applying groove 835 has a depth dimension that allows the radially outer portion 832 to be elastically deformed in the radial direction. For this reason, the radially outer portion 832 can be elastically deformed in the radial direction. Further, in this embodiment, by forming the elasticity imparting groove 835, the radially inner portion 831 can be elastically deformed in the radial direction as well as the radially outer portion 832.

  In the insulator 8, the axially outer portion of the outer peripheral side covering portion 83 is separated into the radially inner portion 861 and the radially outer portion 832 by the elasticity imparting groove 835 formed on the axially outer end surface 830. The axially outer portion of the radially inner portion 831 and the axially outer portion of the radially outer portion 832 are in the same plane. Furthermore, the axially outer side portion of the outer peripheral side covering portion 83 is also divided by a coil introduction groove 84, a coil winding first groove 861, and a coil winding second groove 862, as will be described later. The outer peripheral side covering portion 83 is entirely within the same plane in the axial direction.

  Further, in the insulator 8, the engaging convex portion 89 is formed in the entire region sandwiched between the coil introduction groove 84 and the coil binding first groove 861, and the dimension of the engaging convex portion 89 in the circumferential direction is the same. long.

  In the insulator 8, a coil introduction groove 84 extending in the radial direction is formed at a position adjacent to the formation position of the engagement convex portion 89 in the circumferential direction on the axially outer end surface 830 of the outer peripheral side covering portion 83. ing. Here, the coil introduction groove 84 and the elasticity imparting groove 835 have the same depth dimension from the outer end surface 830 in the axial direction of the outer peripheral side covering portion 83, and the bottom part of the coil introduction groove 84 and the elasticity imparting groove are the same. It is connected to the bottom of 835. The coil introduction groove 84 is used to introduce the coil winding start portion 61 into the coil winding portion 80 from the radially outer side of the outer peripheral side covering portion 83.

  In the insulator 8, the coil winding portion is provided on the opposite side to the side where the coil introduction groove 84 is formed with respect to the formation position of the engagement convex portion 89 on the axially outer end surface 830 of the outer peripheral side covering portion 83. A first coil-linking groove 861 and a second coil-binding groove 862 that connect 80 and the outer side of the outer peripheral side covering portion 83 in the radial direction are formed in parallel. Further, on the outer surface in the radial direction of the outer covering portion 83, the coil winding convex portion 863 is left between the coil winding first groove 861 and the coil winding second groove 862. A coil guide recess 864 that connects the end of the first bundling groove 861 and the end of the second bundling groove 862 is formed.

  In the coil binding convex portion 863, the wall portion 863f facing the coil guide concave portion 864 (see FIGS. 2B and 3B) is such that the root portion 863a located on the radially inner side is located on the radially outer side. The outer peripheral end portion 863b is recessed outward in the axial direction. In this embodiment, the wall portion 863f is recessed obliquely from the outer peripheral end portion 863b toward the root portion 863a.

  Further, the outer peripheral side covering portion 83 has a depth dimension equal to or larger than the depth of the coil guide concave portion 864 and a width dimension equal to or larger than the width dimension of the coil binding convex portion 863 on the outer surface in the radial direction of the outer peripheral side covering portion 83. A groove-like recess 865 extending in the axial direction from the edge on the inner side in the axial direction of 83 (side where the stator core 5 is located in the motor axis L direction) to the coil guide recess 864 is formed. In this embodiment, the groove-shaped recess 865 is formed with the same depth as the coil guide recess 864 and has the same width as the coil binding protrusion 863.

  The coil winding first groove 861, the coil winding second groove 862, the coil binding convex portion 863, and the coil guide concave portion 864 are used to fix the winding end portion 62 of the coil 6. More specifically, the coil winding end portion 62 is passed from the coil winding portion 80 to the coil winding first groove 861, the coil guide recess 864 and the coil winding second groove 862, As a result, the winding end portion 62 of the coil 6 is fixed in a state of being caught by the coil binding convex portion 863. In addition, the wall portion 863f facing the coil guide concave portion 864 in the coil binding convex portion 863 has a concave root portion 863a located on the inner side in the radial direction. For this reason, the coil winding end portion 62 is securely fixed to the base side of the coil binding convex portion 863 and the coil 6 winding end portion 62 projects radially outward from the outer peripheral surface of the stator 4. There is nothing to do.

  In the motor 1 configured as described above, the winding start portion 61 and the winding end portion 62 of the coil 6 are pulled out to one side in the motor axis L direction of the stator 4 and connected to the power supply member 68 of the power supply member holder 69. At that time, since the winding end portion 62 of the coil 6 can be hooked on the coil-engaging convex portion 863, the coil 6 is not loosened.

  Here, as shown in FIGS. 3A, 3 </ b> B, and 3 </ b> D, the coil 6 includes at least a portion of the outer peripheral side covering portion 83 that is located radially inward with respect to the coil binding convex portion 863. It is wound to the position where it touches a part. The coil 6 is wound so as not to protrude from the axially outer end surface 830 in the coil winding portion 80, but is wound to a portion located on the axially outer side from the bottom of the elasticity applying groove 835. . For this reason, the coil 6 is wound to a position in contact with the radially inner portion 831 formed in the upper half of the insulator 8, and the radially inner portion 831 is supported by the coil 6 from the radially inner side. Yes. Therefore, the radially inner portion 831 does not bend radially inward.

  In this embodiment, a groove-shaped recess 865 extending from the axially inner edge 839 of the outer periphery-side covering portion 83 to the coil guide recess 864 is formed on the radially outer surface of the outer periphery-side covering portion 83 of the insulator 8. The groove-shaped recess 865 has the same depth dimension as the coil guide recess 864 and the same width dimension as the coil binding protrusion 863.

  Therefore, as shown in FIG. 4, the insulator 8 is formed using a mold 1000 (a portion with a diagonal line rising to the right in FIG. 4) and a metal mold 2000 (a part with a diagonal line with a downward slope in FIG. 4). , A portion 1861 constituting the coil winding first groove 861 and a portion 1862 constituting the coil winding second groove 862 in the mold 1000 and a coil guide recess 864 in the mold 2000 are formed. The portion 2864 and the portion 2865 forming the groove-like recess 865 can be opposed to each other in the motor axis L direction at a position shifted in the circumferential direction. Therefore, when the insulator 8 is molded, it is not necessary to use an expensive mold such as a slide mold. That is, even when the groove-like recess 865 is not formed, or even when the groove-like recess 865 is formed, the groove-like recess 865 is shallower than the coil guide recess 864, or the width dimension of the groove-like recess 865 is a coil-entangled protrusion. If the width of the portion 863 is smaller, the insulator 8 cannot be formed with the general molds 1000 and 2000 shown in FIG. 4, and therefore an expensive mold such as a slide mold is used.

(Fixing of insulator 8 with cover member 3)
FIG. 5 is an explanatory view showing a state in which the insulator 8 is fixed by the cover member 3 in the motor 1 to which the present invention is applied. FIGS. 5 (a), 5 (b), and 5 (c) each output the cover member 3. FIG. 4 is a perspective view seen from the side, an explanatory view showing a state in which the divided stator cores 50 are arranged in an annular shape to constitute a cylindrical stator 4, and an explanatory view showing a state in which the cover member 3 is covered on the insulator 8.

  In this embodiment, after the coil 6 is wound around the split core 50 via the insulator 8, as shown in FIG. 5B, a plurality of split cores 50 are arranged in the circumferential direction to form a cylindrical stator. 4 is fixed to the inner peripheral surface of the motor case 2 shown in FIG. 1 by a method such as shrink fitting. Until then, it is necessary to fix the split core 50 so that the stator 4 maintains a cylindrical shape. Therefore, in this embodiment, first, as described with reference to FIGS. 2 and 3, the insulator 8 is formed with an engaging convex portion 89 protruding outward in the radial direction. In the state in which the cylindrical stator 4 is configured in this way, the insulators 8 are in a state in which the same shape is arranged in the circumferential direction. For this reason, around the stator 4, engagement convex portions 89 having the same circumferential length are arranged at equiangular intervals at a plurality of circumferential locations.

  Further, as shown in FIG. 5A, the cover member 3 has a structure in which a cylindrical portion 32 protrudes from the outer peripheral edge of the circular upper plate portion 31 toward the opposite output side. A plurality of engaging recesses 33 having the same length in the circumferential direction are formed at equiangular intervals at the upper end portion connected to the plate portion 31. Here, the engagement convex portion 89 and the engagement concave portion 33 correspond one-to-one, and the engagement convex portion 89 and the engagement concave portion 33 have the same length in the circumferential direction. For this reason, as shown in FIG. 5C, when the cover member 3 is put on the stator 4, the engaging convex portion 89 enters and engages with the engaging concave portion 33, and the insulator 8 is fixed to the cover member 3. . In this state, the insulator 8 is restricted from moving in the motor axial direction L by the cover member 3. Moreover, since the width dimension of the engaging convex part 89 and the width dimension of the engaging concave part 33 are substantially the same, the movement of the insulator 8 in the circumferential direction is also restricted by the cover member 3. Therefore, the stator 4 is held in a cylindrical shape.

  The engaging recess 33 is a through hole. For this reason, the cover member 3 can be manufactured by a general mold molding in which the mold is arranged so as to face the counter-output side with respect to the mold arranged on the output side. It is not necessary to use an expensive mold such as.

  Further, since the cover member 3 is provided between the power supply member holder 69 and the bearing holder 20, a hole 511 through which the terminal 681 standing from the power supply member 68 toward the output side is formed in the upper plate portion 31. Has been.

(Main effects of this form)
As described above, in the insulator 8 used in the motor 1 of this embodiment, as described with reference to FIG. 2 and FIG. 3, the first coil winding groove 861 and the second coil winding groove 862. A coil guide recess 864 is formed so as to leave a coil binding convex portion 863 between the coil winding portion 80 and the coil end portion 62 of the coil 6 from the coil winding portion 80 to the first coil winding groove 861 and the coil. It is passed through the guide recess 864 and the second coil binding groove 862. For this reason, since the winding end portion 62 of the coil 6 is securely fixed, the coil 6 is not unwound.

  In addition, the coil 6 is wound to a position where it comes into contact with at least a part of a portion located on the radially inner side with respect to the coil binding convex portion 863 in the outer peripheral side covering portion 83. For this reason, the portion where the coil binding convex portion 863 is formed in the outer peripheral side covering portion 83 is equivalent to the fact that the coil winding first groove 861 and the coil binding second groove 862 are formed on both sides. Although it is easy to bend, it is supported by the coil 6 inside in the radial direction. Therefore, even if the coil winding end portion 62 is passed through the coil winding first groove 861, the coil guide recess 864 and the coil binding second groove 862, the outer peripheral side covering portion 83 is on the coil winding portion 80 side. It does not bend (inward in the radial direction).

  Further, as described with reference to FIG. 5 and the like, after the stator 4 is manufactured, the engaging convex portion 89 of the insulator 8 and the engaging concave portion 33 of the cover member 3 are simply covered with the cover member 3 over the insulator 8. And the insulator 8 is fixed to the cover member 3. For this reason, the stator 4 is reliably held in a cylindrical shape by the cover member 3. Here, when the insulator 8 and the cover member 3 are engaged with each other, the insulator 8 is provided with an engaging convex portion 89 protruding outward in the radial direction. With such a configuration, unlike the case where a recess or a hole that is recessed in the radial direction is formed in the insulator 8, the insulator 8 can be formed with a normal mold, and the insulator 8 and the motor 1 can be manufactured at low cost. it can. Further, when the motor 1 is assembled by an automatic machine, the automatic machine can hold the stator 4 with reference to the position of the engaging convex portion 89, so that the stator 4 can be held in a predetermined state. .

  In the insulator 8, the engaging convex portion 89 is formed in the entire region sandwiched between the coil introduction groove 84 and the coil binding first groove 861, and the circumferential dimension of the engaging convex portion 89 is set. It is set as long as possible. For this reason, the insulator 8 and the cover member 3 can be firmly connected.

  Further, in the cover member 3, the engagement concave portions 33 are formed at a plurality of locations in the circumferential direction, and the engagement convex portion 89 of the insulator 8 is an engagement concave portion into which the engagement convex portion 89 fits among the plurality of engagement concave portions 33. 33 and the circumferential dimension are substantially equal. For this reason, the insulator 8 and the cover member 3 are reliably fixed in the circumferential direction in a state where the engagement convex portion 89 of the insulator 8 and the engagement concave portion 33 of the cover member 3 are engaged.

  Further, as described with reference to FIGS. 2 and 3, in the insulator 8, the outer peripheral covering portion 83 is divided into the radially outer portion 832 and the radially inner portion 831 by the elasticity applying groove 835. Yes. For this reason, only by covering the insulator 8 with the cover member 3, the radially outer portion 832 formed with the engagement convex portion 89 is bent inward, and the engagement convex portion 89 of the insulator 8 and the cover member 3 are engaged. The concave portion 33 is reliably engaged, and this engagement state is reliably maintained by the force of the radially outer portion 832 returning to its original shape. Further, when the insulator 8 is covered with the cover member 3 to engage the engaging convex portion 89 with the engaging concave portion 33, the engaging convex portion 89 can be prevented from being damaged.

  Further, since the coil 6 is wound up to a position in contact with the radially inner portion 831, the coil 6 has a radius even when the outer peripheral side covering portion 83 is divided into the radially outer portion 832 and the radially inner portion 831. Since the directional inner portion 831 is supported, the inward bending of the radially inner portion 831 can be prevented.

  Further, in this embodiment, the axially outer portion of the insulator 8 is divided by the elasticity imparting groove 835, the coil introducing groove 84, the coil winding first groove 861, and the coil winding second groove 862. However, the outer portion of the outer peripheral side covering portion 83 is entirely in the same plane in the axial direction. For this reason, when the power supply member holder 69 is stacked on the axially outer side portion of the insulator 8, the posture of the power supply holder 69 is stabilized. For this reason, the end of the coil 6 can be reliably and easily connected to the power supply member 68. Further, the power supply member holder 69 is securely held between the insulator 8 and the cover member 3 only by connecting the insulator 8 and the cover member 3 in a state where the power supply member holder 69 is overlapped on the axially outer side portion of the insulator 8. be able to. Therefore, the power supply member holder 69 only needs to be overlapped with the outer portion in the axial direction of the insulator 8, and it is not necessary to connect the power supply member holder 69 and the insulator 8.

[Other embodiments]
In the above embodiment, the dedicated cover member 3 is used. However, even if the insulator 8 is fixed by using other members such as the power supply member holder 69 and the bearing holder 20 shown in FIG. Good. In the above-described embodiment, the output-side insulator 8 and the counter-output-side insulator 9 having the same configuration are used, so that the insulator 8 is fixed by the cover member 3 and the coil 6 starts to wind 61 or ends. The configuration for holding 62 may be applied to the non-output-side insulator 9 instead of the output-side insulator 8 or may be used for both.

  Further, the present invention is not limited to the motor using the split core 50 but may be applied to the motor 1 having a structure in which a belt-like stator body in which a plurality of cores are connected by an insulator is curved in a cylindrical shape.

DESCRIPTION OF SYMBOLS 1 Motor 3 Cover member 4 Stator 5 Stator core 6 Coil 7 Rotor 8, 9 Insulator 33 Engagement recessed part 50 Divided core 51 Salient pole 80 Coil winding part 83 Outer peripheral side covering part 89 Engagement convex part 831 Radial inner part 832 Radial direction Outer portion 835 Elasticity imparting groove 861 Coil-binding first groove 862 Coil-binding second groove 863 Coil-engaging convex portion 864 Coil guide concave portion 865 Groove-shaped concave portion

Claims (5)

A stator core having a plurality of salient poles projecting radially inward from the annular core portion, an insulator covering an axial end of the stator core, and a drive coil wound around the salient pole via the insulator A cylindrical stator provided with,
A rotor provided with a permanent magnet facing the tip of the salient pole through a gap;
In a motor having
The insulator includes a coil winding portion, and an outer peripheral side covering portion that overlaps the annular core portion at a radially outer side with respect to the coil winding portion,
On the outer end surface in the axial direction of the outer periphery side covering portion, a first coil winding groove and a second coil binding groove connecting the coil winding portion and the radially outer side of the outer periphery covering portion are arranged in parallel. Formed,
For the coil binding, a coil winding convex part is left between the first coil winding groove and the second coil binding groove on the radially outer surface of the outer covering portion. A coil guide recess for connecting the first groove and the second coil binding groove is formed,
The motor is characterized in that a winding end portion of the coil is passed from the coil winding portion to the coil winding first groove, the coil guide recess, and the coil winding second groove.   A wall portion facing the concave portion for coil guide in the convex portion for coiling is characterized in that a root portion located radially inside is recessed in an axial direction from an outer peripheral end portion located radially outside. The motor according to claim 1.   On the radially outer surface of the outer peripheral side covering portion, the axis of the outer peripheral side covering portion has a depth dimension equal to or greater than the depth of the coil guide concave portion and a width dimension equal to or greater than the width dimension of the coil binding convex portion. 3. The motor according to claim 1, wherein a groove-like recess that extends from an inner edge in the direction to the coil guide recess is formed.   4. The coil according to claim 1, wherein the coil is wound up to a position in contact with at least a part of a portion located radially inward with respect to the coil binding convex portion in the outer peripheral side covering portion. The motor according to any one of the above.   The coil winding portion and the radial outer side of the outer peripheral side covering portion are connected to the outer end surface in the axial direction of the outer peripheral side covering portion so that the winding start portion of the coil is from the outer side in the radial direction of the outer peripheral side covering portion. The motor according to any one of claims 1 to 4, wherein a coil introduction groove that leads to the coil winding portion is formed.

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