JP2019146404A - Stator and motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor capable of improving torque performance. A magnetic plate 40 extends outward in the axial direction from a laminated plate portion 41 laminated on a core sheet at an axial end portion of a main core portion 30 and an end portion of the laminated plate portion 41 on the rotor 15 side. It also has a rotor facing portion 44 facing the rotor 15 in the radial direction. In the main core portion 30, a part of the core sheets are rotationally laminated, and a plurality of axially continuous core sheets including at least a core sheet that abuts on the magnetic plate 40 in the axial direction are laminated in a non-rotating state. 1 It has non-rotating laminated portions 31, 34 as non-rotating laminated portions. [Selection diagram] Fig. 1

Description

  The present invention relates to a stator and a motor.

  Conventionally, a stator plate that constitutes a stator of a motor is provided with a magnetic plate having a rotor and a rotor facing portion corresponding to the radial direction at the axial end of a main core portion formed by laminating a plurality of core sheets. (For example, refer patent document 1).

JP 2014-147173 A

  By the way, in the stator as described above, for example, by rotating and laminating a plurality of core sheets, the difference in thickness (axial length) in the circumferential direction of the core sheet and the undulation are made uniform, and the torque performance is stabilized. Can be expected. On the other hand, there is a concern that torque performance may be reduced due to a gap between the core sheets.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a stator and a motor that can improve torque performance.

  A stator that solves the above problems includes a main core portion in which a plurality of core sheets are laminated in the axial direction of a rotating shaft, a magnetic core provided at both axial end portions of the main core portion, and the stator core. A coil provided, and the magnetic plate is laminated on the core sheet at the axial end of the main core, and the outer side in the axial direction from the rotor-side end of the laminated plate And a rotor-facing portion that is radially opposed to the rotor, and the main core portion is a core sheet in which a part of the core sheet is rotationally laminated and at least contacts the magnetic plate in the axial direction. Including a first non-rotating laminated portion in which a plurality of core sheets continuous in the axial direction are laminated in a non-rotating state.

  According to the above aspect, the main core portion has the first non-rotation laminated portion in which the plurality of core sheets continuous in the axial direction including the core sheet in contact with the magnetic plate in the axial direction are laminated in the non-rotation state. Thereby, generation | occurrence | production of the clearance gap in the axial direction of each core sheet | seat of a 1st non-rotation lamination | stacking part is suppressed. In particular, since the magnetic plate has a rotor facing portion, the magnetic flux density tends to be high, and if a gap is generated between the axial directions of a plurality of core sheets including the core sheet that contacts the magnetic plate, the torque performance may be reduced. is there. For this reason, as described above, by laminating the core sheets of the first non-rotating laminated portion in a non-rotating state, the generation of gaps between the core sheets can be suppressed and the torque performance can be improved.

  In the stator, the main core portion is laminated in a non-rotating state in addition to the first non-rotating laminated portion, a plurality of core sheets continuous in the axial direction among core sheets other than the first non-rotating laminated portion. It is preferable to have a second non-rotating laminated portion.

According to the said aspect, by having a 2nd non-rotation lamination | stacking part, generation | occurrence | production of the clearance gap between the core sheets of a 2nd non-rotation lamination | stacking part can be suppressed, and it can contribute to torque performance improvement.
In the stator, the first non-rotating laminated portion and the second non-rotating laminated portion are rotationally laminated, and the first non-rotating laminated portion and the second non-rotating laminated portion are the same number of the sheets. It is preferable that the core sheets are laminated.

  According to the above aspect, by rotating and laminating the first non-rotating laminated portion and the second non-rotating laminated portion, the circumference of the core sheet that can occur between the first non-rotating laminated portion and the second non-rotating laminated portion. Differences in thickness and undulation in the direction can be made uniform.

In the stator, the length of the laminated plate portion in the axial direction is preferably longer than the axial length of the core sheet and shorter than the axial length of the first non-rotating laminated portion.
According to the above aspect, the length of the laminated plate portion in the axial direction is longer than the axial length of the core sheet and shorter than the axial length of the first non-rotating laminated portion, so that only the magnetic plate is used. Even in the situation where the magnetic saturation occurs, the axial length of the first non-rotating laminated portion is longer than the axial length of the laminated plate portion of the magnetic plate, so that magnetic saturation can be suppressed and the torque performance can be improved.

Moreover, the motor which solves the said subject is provided with the stator in any one of the said, and the rotor arrange | positioned facing this stator.
According to the said aspect, the motor which can improve torque performance can be provided.

  Moreover, the motor which solves the said subject has a stator which has a 1st non-rotation lamination | stacking part and a 2nd non-rotation lamination | stacking part in the stator in any one of said, and a rotor arrange | positioned facing the said stator. The rotor has 10 magnetic poles, the stator has 60 slots, and each of the first non-rotating laminated portion and the second non-rotating laminated portion is provided with two of the 18 cores. It is configured by laminating sheets, and each non-rotating laminated portion is rotated and laminated by shifting by 90 degrees in the circumferential direction.

  According to the above aspect, each of the first non-rotating laminated portion and the second non-rotating laminated portion is provided in two, and is configured by laminating 18 core sheets, and each non-rotating laminated portion is 90 degrees in the circumferential direction. Since the layers are rotated and shifted one by one, the difference in thickness and undulation in the circumferential direction of the core sheet can be made uniform while improving the torque performance.

  According to the stator and motor of the present invention, torque performance can be improved.

The schematic cross section of the motor in one Embodiment. The exploded perspective view of the motor in the form. (A) is a side view of the motor in the same form, (b) is sectional drawing of the motor in the same form. The disassembled perspective view of the stator core in the same form. The schematic cross section of the stator core in the same form.

  Hereinafter, an embodiment of the motor will be described. In each drawing, a part of the configuration may be exaggerated or simplified for convenience of explanation. Also, the dimensional ratio of each part may be different from the actual one.

  As shown in FIGS. 1 and 2, the motor 10 has an annular shape by a first end frame 11 (hereinafter referred to as a first frame 11) and a second end frame 12 (hereinafter referred to as a second frame 12). The stator 13 is sandwiched in the direction of the axis L1 of the rotating shaft 15a. The first frame 11 and the second frame 12 are fixed to each other by a plurality of (two in the present embodiment) through bolts 14 arranged on the outer periphery of the stator 13. In addition, a rotor 15 having a rotation shaft 15a is rotatably disposed inside the stator 13 in the radial direction.

  In the present embodiment, the end frame that holds the stator 13 on the side opposite to the axis L1 direction (upper side in FIG. 1) of the motor 10 is the first frame 11, and the end frame that holds the stator 13 on the axis L1 direction output side. Is the second frame 12.

[Stator]
As shown in FIGS. 1 and 2, the stator 13 includes an annular stator core 21 and a coil 22 wound around the stator core 21.

  As shown in FIG. 3B, the stator core 21 includes a cylindrical portion 23 having a cylindrical shape, and a plurality (60 in the present embodiment) of teeth 24 extending radially inward from the cylindrical portion 23 and arranged in the circumferential direction. It has four core outer peripheral protrusions 25 that protrude radially outward from the outer peripheral surface of the cylindrical portion 23 and extend along the direction of the axis L1. Both end surfaces of the cylindrical portion 23 in the direction of the axis L1 have a planar shape perpendicular to the direction of the axis L1. The coil 22 is wound around each tooth 24. That is, the stator 13 of this example has 60 slots.

  As shown in FIGS. 3 (a) and 3 (b), the core outer periphery protruding portion 25 has four equiangular intervals (90 ° interval in this embodiment) in the circumferential direction on the outer peripheral surface of the cylindrical portion 23. Is provided. Each core outer peripheral protrusion 25 forms a ridge extending along the axis L1 direction from one end to the other end of the cylindrical portion 23 in the axis L1 direction, and as the shape viewed from the axis L1 direction goes from the base end to the tip. It has a substantially trapezoidal shape with a narrow width in the circumferential direction. In addition, each core outer periphery protruding portion 25 is formed with an arc recess 25a that is recessed from the distal end (radially outer end) of each core outer periphery protruding portion 25 toward the base end. The circular arc recess 25a has a circular arc shape when viewed from the direction of the axis L1, and has a groove shape penetrating the core outer peripheral protrusion 25 in the direction of the axis L1. The radius of curvature of the arc recess 25a is slightly larger than the radius of the male screw portion of the through bolt 14. And two core outer periphery protrusions provided in the left and right in two core outer periphery protrusions 25 (FIG. 3 (b)) provided in two places which are 180 degrees apart in the circumferential direction among the four core outer periphery protrusions 25. A through bolt 14 having a substantially cylindrical shape extending in the direction of the axis L1 is disposed in the circular arc recess 25a of the portion 25. These two core outer peripheral protrusions 25 surround approximately half of the outer periphery of the through bolt 14 when viewed from the direction of the axis L1. Thereby, the shift | offset | difference of the circumferential direction of the stator core 21 is suppressed.

  As shown in FIGS. 1 and 4, the stator core 21 includes a main core portion 30 and magnetic plates 40 fixed to both ends of the main core portion 30 in the axis L1 direction. In the present embodiment, one magnetic plate 40 having the same shape is provided on each side of the main core portion 30 in the direction of the axis L1.

  The main core portion 30 has a total of four non-rotating laminated portions 31 to 34. The main core part 30 includes four non-rotating laminated parts 31 to 34 from the one side in the axis L1 direction to the other side in the axis L1 direction, the non-rotating laminated part 31, the non-rotating laminated part 32, the non-rotating laminated part 33, and the non-rotating laminated part. Laminated in the order of 34. The two non-rotating laminated portions 31 and 34 located on both sides of the axis L1 direction correspond to the first non-rotating laminated portion, and the two non-rotating laminated portions 32 and 33 located on the center side in the axis L1 direction are the second non-rotating laminated portion. It corresponds to the part.

  Each of the non-rotating laminated portions 31 to 34 is configured by laminating a plurality of core sheets 35 in the direction of the axis L1 in a state where the core sheets 35 are not rolled (rotated and laminated), that is, the core sheets 35 are not rotated in the circumferential direction. The Here, the core sheet 35 is formed, for example, by punching an electromagnetic steel sheet by press working. For this reason, for example, in each core sheet 35 constituting the non-rotating laminated portions 31 to 34, even when there is a undulation or thickness deviation, the core sheets 35 are laminated in the direction of the axis L1 without being rotated. By doing so, the generation | occurrence | production of the clearance gap between the core sheet 35 in the axis line L1 direction is suppressed.

  Moreover, each non-rotation lamination | stacking part 31-34 of this embodiment is comprised by laminating | stacking the same number of core sheets 35. FIG. As an example, each non-rotation lamination | stacking part 31-34 can be comprised by laminating | stacking 18 core sheets 35. FIG. That is, in this example, the main core portion 30 is configured by laminating a total of 72 core sheets 35 in the direction of the axis L1.

  Moreover, each non-rotation lamination | stacking part 31-34 is laminated | stacked in the state rotated 90 degree | times in the circumferential direction with the non-rotation lamination | stacking parts 31-34 adjacent to the axis line L1 direction. More specifically, for example, the non-rotating laminated portion 31 located on one end of the axis L1 direction and the non-rotating laminated portion 32 adjacent on the other side in the axis L1 direction are circumferentially one side with respect to the non-rotating laminated portion 31. Are stacked 90 degrees apart. Further, the non-rotating laminated portion 33 adjacent to the non-rotating laminated portion 32 on the other side in the axis L1 direction is laminated so as to be shifted 90 degrees to the one side in the circumferential direction with respect to the non-rotating laminated portion 32. Further, the non-rotating laminated portion 34 that is adjacent to the non-rotating laminated portion 33 on the other side in the axis L1 direction and located at the end on the other side in the axis L1 direction is 90 degrees to the circumferential one side with respect to the non-rotating laminated portion 33. Laminated and stacked.

  As shown in FIGS. 4 and 5, each core sheet 35 used in the main core portion 30 includes an annular portion 36 that forms an annular shape, and a tooth configuration portion 37 that extends radially inward from the annular portion 36. A plurality of projecting portions 38 projecting radially outward from the annular portion 36 are provided. Each core sheet 35 is laminated so that the teeth constituting portion 37 and the protruding portion 38 overlap along the direction of the axis L1.

The magnetic plate 40 is formed by pressing a cold rolled steel plate (SPCC), for example.
The magnetic plate 40 has a plate-like laminated plate portion 41 laminated on the core sheet 35 on both sides in the axis L1 direction of the main core portion 30. The laminated plate portion 41 is laminated so as to be substantially parallel and coaxial with the core sheet 35 of the main core portion 30. Further, the length (plate thickness) T1 in the axis L1 direction of each magnetic plate 40 is thicker than the length (plate thickness) T2 in the axis L1 direction of the core sheet 35 of the main core portion 30, and each non-rotating laminated portion 31-34. Is set to be shorter (thinner) than the length (thickness) T3 in the direction of the axis L1.

  The laminated plate portion 41 includes an annular portion 42 that forms an annular shape overlapping the annular portion 36 of the main core portion 30 (core sheet 35) in the direction of the axis L1, and a plurality of annular portions 42 that extend radially inward from the annular portion 42. Teeth constituent portion 43 and a plurality of protruding portions 45 protruding radially outward from annular portion 42 are formed. The annular portion 42, the teeth constituent portion 43, and the protruding portion 45 of the laminated plate portion 41 are respectively formed of the annular portion 36, the teeth constituent portion 37, and the protruding portion 38 of the main core portion 30 (core sheet 35) when viewed in the direction of the axis L1. Each has the same shape.

  As shown in FIGS. 4 and 5, the annular portions 36 and 42 of the laminated plate portion 41 of the core sheet 35 and the magnetic plate 40 are formed with convex portions 46 (doughs) protruding in the plate thickness direction by press working. ing. In each of the annular portions 36 and 42, a plurality of convex portions 46 are formed in the circumferential direction (four in this embodiment). Further, each of the annular portions 36 and 42 has a concave portion 47 formed when the convex portion 46 is formed on the back side of each convex portion 46. Each convex portion 46 is press-fitted (clamped) into the core sheet 35 and the concave portion 47 of the magnetic plate 40 adjacent in the direction of the axis L1. Accordingly, the core sheets 35 are integrated to form the main core portion 30, and the magnetic plates 40 are fixed to both sides of the main core portion 30 in the axis L1 direction.

  At this time, in the magnetic plate 40, the annular portion 42 of the laminated plate portion 41, the teeth constituting portion 43, and the protruding portion 45 are the annular portion 36, the teeth constituting portion 37, and the protruding portion of the main core portion 30 (core sheet 35). 38 to overlap each other in the direction of the axis L1. The main core portion 30 (core sheet 35) and the annular portions 36 and 42 of the magnetic plate 40 constitute the cylindrical portion 23 of the stator core 21, and the tooth constituent portions 37 and 43 constitute the teeth 24 of the stator core 21. The projecting portions 38 and 45 constitute the core outer peripheral projecting portion 25. The shape of each of the annular portions 36, 42, each of the tooth components 37, 43, and each of the protrusions 38, 45 as viewed in the direction of the axis L1 is the same as the shape of the cylindrical portion 23, the teeth 24, and the core outer peripheral protrusion 25 described above. Since they are the same, detailed description is omitted.

  At the radially inner end (rotor 15 side end) of the teeth constituting portion 43 of the magnetic plate 40, a rotor facing portion 44 is formed extending outward in the axis L1 direction (on the side opposite to the main core portion 30). . The rotor facing portion 44 is formed by bending the radially inner end portion of the teeth constituting portion 43 outwardly in the axis L1 direction at a substantially right angle. Thus, the rotor facing portion 44 is configured such that its plate surface (inner peripheral surface) faces the rotor 15 in the radial direction. The inner peripheral surface of the rotor facing portion 44 is curved so as to have the same diameter as the inner diameter of the main core portion 30 (core sheet 35). Further, the rotor facing portion 44 has, for example, a substantially trapezoidal shape whose circumferential width becomes narrower toward the tip side.

  As shown in FIGS. 1 and 2, the first frame 11 and the second frame 12 disposed on both sides of the stator core 21 in the direction of the axis L <b> 1 are made of, for example, a metal material and are formed by casting. The first frame 11 has a sufficient thickness and has a function as a heat sink that absorbs heat generated by the motor 10.

  The first and second frames 11 and 12 are substantially disc-shaped first and second main body parts 51 and 61, and cylindrical first parts extending from the first and second main body parts 51 and 61 in the direction of the axis L1. 1 and second stator holding portions 52 and 62, respectively. In addition, the first and second frames 11 and 12 include a plurality of (in the present embodiment, integrally provided on the outer peripheral surfaces of the first and second stator holding portions 52 and 62 and the first and second main body portions 51 and 61. First and second bolt fastening portions 53, 63).

  The first and second bolt fastening portions 53 and 63 are provided at equiangular intervals in the circumferential direction (180 ° intervals in the present embodiment). As shown in FIGS. 2 and 3B, each first bolt fastening portion 53 is formed with a first fastening hole 53 a through which the through bolt 14 is inserted, and each second bolt fastening portion 63. Is formed with a female screw-like second fastening hole 63a into which the through bolt 14 is screwed.

  In the first frame 11 and the second frame 12, the first and second bolt fastening portions 53 and 63 are connected to each other by the through bolt 14 that passes through the first fastening hole 53a and is screwed into the second fastening hole 63a. Thus, they are fixed and integrated with each other. The second frame 12 has a fixing portion 64 for fixing the motor 10 to an external fixing place with a screw (not shown). The fixing portion 64 extends radially outward from two locations in the second main body portion 61 that are displaced in the circumferential direction from the two second bolt fastening portions 63. For example, the motor 10 is fixed at a fixed place such that the second frame 12 is positioned below the first frame 11.

  As shown in FIGS. 2 and 3 (a), one end of the stator core 21 in the direction of the axis L1 (the upper end in FIG. 3 (a)) is fitted radially inward at the tip of the first stator holding portion 52. A combined first fitting portion 55 is formed. Similarly, a second fitting portion 65 in which the other end portion of the stator core 21 in the direction of the axis L1 (the lower end portion in FIG. 3A) is fitted radially inward at the distal end portion of the second stator holding portion 62. Is formed.

  The first fitting portion 55 is composed of a plurality (four in this embodiment) of first fitting walls 55a that are spaced apart in the circumferential direction. The four first fitting walls 55a are provided at equiangular intervals in the circumferential direction (90 ° intervals in the present embodiment). Further, the four first fitting walls 55a are arranged one by one between the core outer peripheral protruding portions 25 adjacent in the circumferential direction. That is, the core outer peripheral protrusion 25 is located between the first fitting walls 55a adjacent in the circumferential direction and overlaps the first fitting wall 55a in the circumferential direction. And the core outer periphery protrusion part 25 does not overlap with the 1st fitting wall 55a in radial direction. The second fitting portion 65 is composed of a plurality (eight in the present embodiment) of second fitting walls 65a that are spaced apart in the circumferential direction. One second fitting wall 65a is disposed on each side in the circumferential direction of each core outer protrusion 25 (that is, two between the core outer protrusions 25 adjacent in the circumferential direction). That is, the core outer peripheral protrusion 25 is located between the second fitting walls 65a adjacent in the circumferential direction and overlaps with the second fitting wall 65a in the circumferential direction. And the core outer periphery protrusion part 25 does not overlap with the 2nd fitting wall 65a in radial direction.

  The first and second fitting portions 55 and 65 (first and second fitting walls 55a and 65a) are more radially thicker than the proximal end portions of the first and second stator holding portions 52 and 62. Is formed thinly. The first and second fitting walls 55a and 65a extend in parallel with the direction of the axis L1 and have an arc shape along the circumferential direction when viewed from the direction of the axis L1. Further, each of the first and second fitting walls 55a and 65a has a narrower width in the circumferential direction from the proximal end toward the distal end (ends on the distal end side of the first and second stator holding portions 52 and 62). .

  As shown in FIG. 1, the inner peripheral surfaces of the first and second fitting portions 55, 65, that is, the radially inner side surfaces of the first and second fitting walls 55a, 65a are the first and second frames. First and second centering surfaces 55b, 65b for centering the stator cores 11, 12 and the stator core 21 are provided.

  The first and second frames 11 and 12 are adjacent to the base end portions of the first and second fitting portions 55 and 65 in a direction orthogonal to the central axis of the first and second stator holding portions 52 and 62. First and second contact surfaces 56 and 66 are provided.

  Then, one end surface (the upper end surface in FIG. 1) of the cylindrical portion 23 fitted in the first fitting portion 55 is in contact with the first contact surface 56 in the axial direction. Further, the other end surface (the lower end surface in FIG. 1) of the cylindrical portion 23 fitted in the second fitting portion 65 is in contact with the second contact surface 66 in the axial direction. In this state, the first frame 11 and the second frame 12 are fixed (fastened) to each other with the through bolts 14 while the stator 13 is sandwiched between the first and second stator holding portions 52 and 62.

A receiving hole 58 through which the ball bearing B <b> 1 can be inserted is passed through the center of the first main body 51.
An accommodation portion 68 is formed at the center of the second main body portion 61 so that the ball bearing B2 can be inserted therein.

  The accommodation hole 58 is formed with an inner diameter substantially equal to the outer diameter of the ball bearing B <b> 1, and the ball bearing B <b> 1 can be inserted from the outer surface side of the first main body 51. The accommodating portion 68 is opened to the outside of the second main body portion 61 and can accommodate the ball bearing B2 from the output side in the direction of the axis L1.

  When one end of the rotating shaft 15a of the rotor 15 is inserted into the ball bearing B1 mounted in the receiving hole 58 and the other end of the rotating shaft 15a is inserted into the ball bearing B2 mounted in the receiving portion 68, the first frame 11 is inserted. And the second frame 12, the rotor 15 is rotatably supported.

  As shown in FIG. 1, a wave washer 71 is inserted into the accommodation hole 58 following the ball bearing B1. The wave washer 71 is inserted into the accommodation hole 58 so that one end side of the rotating shaft 15a is inserted through the central portion thereof.

  Further, a holding member 72 is inserted into the accommodation hole 58 following the wave washer 71. That is, the holding member 72 is positioned outside the wave washer 71 in the axis L1 direction (side away from the rotor 15) in the accommodation hole 58. The holding member 72 is formed in an annular shape, for example, made of a softer material than the first frame 11 and having an outer diameter substantially equal to the inner diameter of the accommodation hole 58. The holding member 72 is inserted into the receiving hole 58 so that the end of the rotating shaft 15a is inserted through the center thereof, and the wave washer 71 and the ball bearing B1 are positioned in the direction of the axis L1 of the rotating shaft 15a. It has become.

  On the outer peripheral surface of the holding member 72, a pressure contact portion 72a is formed at an intermediate portion in the axis L1 direction. The pressure contact portion 72 a is formed with an outer diameter slightly larger than the inner diameter of the accommodation hole 58. For this reason, when the holding member 72 is inserted into the accommodation hole 58, it enters the inner peripheral surface of the accommodation hole 58 while being rubbed.

  On the outer peripheral surface of the holding member 72, the portion on the wave washer 71 side from the press contact portion 72 a is formed with an outer diameter slightly smaller than that of the press contact portion 72 a, and a slight gap is secured between the inner peripheral surface of the accommodation hole 58. The introduction part 72b is formed. The introduction member 72 b makes it easy to fit the holding member 72 into the accommodation hole 58.

  On the outer circumferential surface of the holding member 72, a housing groove 72c is formed in the circumferential direction between the inner circumferential surface of the housing hole 58 and on the outer side of the pressure contact portion 72a in the direction of the axis L1 (on the side opposite to the wave washer 71). The accommodation groove 72c is formed in a triangular cross section in which the depth of the groove increases toward the pressure contact portion 72a. Then, when the holding member 72 is inserted into the accommodation hole 58, shavings generated by the pressure contact portion 72 a rubbing against the inner peripheral surface of the accommodation hole 58 and scraping the surface of the pressure contact portion 72 a are generated in the accommodation groove 72 c. Is to be housed.

Next, the operation of the motor having the above configuration will be described.
The main core portion 30 of the motor 10 according to the present embodiment includes four non-rotating laminated portions 31 to 34 on which the core sheet 35 is laminated in a non-rotating state. Of the four non-rotating laminated portions 31 to 34, the two non-rotating laminated portions 31, 34 include a plurality of core sheets 35 that are continuous in the axial direction, including the core sheet 35 that contacts the magnetic plate 40 in the direction of the axis L1. Have Thereby, generation | occurrence | production of the clearance gap between each core sheet 35 of the non-rotation lamination | stacking part 31 and 34 contact | abutted with the magnetic board 40 which has the rotor opposing part 44 will be suppressed.

With the motor as described above, the following effects can be obtained.
(1) The main core portion includes the non-rotating laminated portions 31 and 34 in which a plurality of core sheets 35 including the core sheet 35 contacting the magnetic plate 40 in the axis L direction and laminated in the axial direction are laminated in a non-rotating state. By having 30, the generation | occurrence | production of the clearance gap in the axis line L direction of each core sheet 35 of the non-rotation lamination | stacking part 31 and 34 is suppressed. In particular, since the magnetic plate 40 has the rotor facing portion 44, the magnetic flux density tends to be high, and if a gap is generated between the axial directions of the plurality of core sheets 35 including the core sheet 35 in contact with the magnetic plate 40, the torque performance May decrease. For this reason, as described above, by laminating the core sheets 35 of the non-rotating laminated portions 31 and 34 in a non-rotating state, the generation of a gap between the core sheets 35 can be suppressed and the torque performance can be improved.

(2) By having the non-rotating laminated portions 32 and 33, generation of a gap between the core sheets 35 of the non-rotating laminated portions 32 and 33 can be suppressed, and the torque performance can be improved.
(3) The core sheet 35 that can be generated between the non-rotating laminated portions 31 and 34 and the non-rotating laminated portions 32 and 33 by rotationally laminating the non-rotating laminated portions 31 and 34 and the non-rotating laminated portions 32 and 33. The difference in thickness in the circumferential direction and the undulation can be made uniform.

  (4) By making the length T1 in the axial direction of the laminated plate portion 41 longer than the axial length T2 of the core sheet 35 and shorter than the axial length T3 of the non-rotating laminated portions 31 and 34. Even in a situation where only the magnetic plate 40 is magnetically saturated, the axial length T3 of the non-rotating laminated portions 31 and 34 is longer than the axial length T1 of the laminated plate portion 41 of the magnetic plate 40. This can be suppressed and contribute to the improvement of torque performance.

  (5) Each of the non-rotating laminated portions 31 and 34 and the non-rotating laminated portions 32 and 33 is provided, and is configured by laminating 18 core sheets 35. The non-rotating laminated portions 31 to 34 are circumferentially arranged. Therefore, the difference in thickness and undulation in the circumferential direction of the core sheet 35 can be made uniform while improving the torque performance.

In addition, you may change the said embodiment as follows.
-In the above-mentioned embodiment, although it was set as the structure which has two non-rotation lamination | stacking parts 32 and 33 as a 2nd non-rotation lamination | stacking part, it does not restrict to this. You may employ | adopt the structure which has the non-rotation lamination | stacking parts 32 and 33 as a 2nd non-rotation lamination | stacking part, and the structure which has three or more.

  Moreover, you may employ | adopt the structure which abbreviate | omitted the non-rotation lamination | stacking parts 32 and 33 as a 2nd non-rotation lamination | stacking part. That is, you may comprise only the two non-rotation lamination | stacking parts 31 and 34 as a 1st non-rotation lamination | stacking part. In this case, the two non-rotating laminated portions 31 and 34 may be rotated and laminated (rolled) by shifting 180 degrees in the circumferential direction, for example.

  Further, instead of the non-rotating laminated portions 32 and 33 as the second non-rotating laminated portions, a plurality of core sheets 35 are rotationally laminated between the non-rotating laminated portions 31 and 34 as the first non-rotating laminated portions in the direction of the axis L1. You may employ | adopt the structure which provides the rotation lamination | stacking part formed.

  In the above embodiment, the non-rotating laminated portions 31 to 34 are configured only. However, the non-rotating laminated portions 31 to 34 have a rotating laminated portion formed by rotating and laminating a plurality of core sheets 35 between the axis L1 directions. It may be adopted.

  In the above embodiment, the number of core sheets 35 is the same in the non-rotating laminated portions 31 and 34 as the first non-rotating laminated portion and the non-rotating laminated portions 32 and 33 as the second non-rotating laminated portion (for example, However, the present invention is not limited to this, and may be configured differently.

  In the above embodiment, the length T1 in the axis L1 direction of each magnetic plate 40 is thicker than the length T2 in the axis L1 direction of the core sheet 35 of the main core portion 30, and the direction of the axis L1 of each of the non-rotating laminated portions 31 to 34 Although the configuration is shorter than the length T3, the configuration is not limited to this. For example, the lengths T1 and T2 in the direction of the axis L1 of the magnetic plate 40 and the core sheet 35 may be the same. Further, a configuration in which the length L1 in the axis L1 direction of the magnetic plate 40 is shorter than the length T2 in the axis L1 direction of the core sheet 35 may be adopted.

In the above embodiment, the motor 10 having 10 poles and 60 slots is used as an example, but the number of poles and the number of slots may be changed as appropriate.
-You may combine the said embodiment and each modification suitably.

  DESCRIPTION OF SYMBOLS 10 ... Motor, 13 ... Stator, 15 ... Rotor, 15a ... Rotary shaft, 21 ... Stator core, 22 ... Coil, 30 ... Main core part, 31, 34 ... Non-rotation lamination | stacking part (1st non-rotation lamination | stacking part), 32, 33: Non-rotating laminated portion (second non-rotating laminated portion), 35: Core sheet, 40 ... Magnetic plate, 41 ... Laminated plate portion, 44 ... Rotor facing portion, T1, T2, T3 ... Axial length.

Claims (6)

A stator core having a main core portion formed by laminating a plurality of core sheets in the axial direction of the rotating shaft and magnetic plates provided at both axial end portions of the main core portion;
A coil provided on the stator core;
With
The magnetic plate includes a laminated plate portion laminated on the core sheet at an axial end portion of the main core portion, and extends axially outward from an end portion on the rotor side of the laminated plate portion and has a diameter with respect to the rotor. A rotor facing portion facing the direction,
In the main core portion, a part of the core sheets is rotated and laminated, and at least a core sheet that is in contact with the magnetic plate in the axial direction is laminated in a non-rotating state. A stator having a first non-rotating laminated portion.   In the main core portion, in addition to the first non-rotating laminated portion, a plurality of core sheets that are continuous in the axial direction among the core sheets other than the first non-rotating laminated portion are laminated in a non-rotating state. The stator according to claim 1, further comprising a non-rotating laminated portion. The first non-rotating laminated portion and the second non-rotating laminated portion are rotationally laminated,
3. The stator according to claim 2, wherein the first non-rotating laminated portion and the second non-rotating laminated portion are configured by laminating the same number of the core sheets.   4. The length of the laminated plate portion in the axial direction is longer than the axial length of the core sheet and shorter than the axial length of the first non-rotating laminated portion. The stator according to item 1.   A motor comprising the stator according to any one of claims 1 to 4 and a rotor disposed to face the stator. The stator according to claim 2, claim 3, or claim 4 quoting claim 2 or 3, and a rotor disposed to face the stator,
The rotor has 10 poles,
The stator has 60 slots,
Two each of the first non-rotating laminated portion and the second non-rotating laminated portion are provided and are configured by laminating 18 core sheets, and each non-rotating laminated portion is shifted by 90 degrees in the circumferential direction. A motor characterized by being laminated in a rotating manner.