Stator, motor and application equipment

Abstract

This stator is provided with: a core having a cylindrical yoke formed by connecting a plurality of yoke sections, and teeth extending from the inner surfaces of the yoke sections in the inward direction in the radial direction of the shaft of the yoke; a coil formed by winding a wire around the teeth; a pair of insulators respectively covering both axial end surfaces of the iron core parallel to the shaft; and an insulating sheet that insulates between the iron core and the coil. The insulating sheet has: a tooth insulating part that covers the side surfaces of the teeth parallel to the axial direction; a yoke insulating portion, one end of which is connected to an outer end in a radial direction of the tooth insulating portion, the yoke insulating portion covering an inner surface of the yoke portion; a pair of extension parts extending in one direction and the other direction in the axial direction from the yoke insulation part; and a curved portion extending from the extended portion and curved in an outer direction opposite to the inner direction in the radial direction. The insulator has a recessed portion recessed from the inner surface thereof and into which the curved portion is fitted.

Description

Technical Field

[0001] The present invention relates to a stator, a motor, and an application device. Background Art

[0002] As a conventional stator, an armature of Patent Document 1 is known. After attaching a pair of insulating slot cells to both side surfaces of the teeth of the armature core, the upper part of the slot cell is fixed by an upper wire holder covering the upper surface of the tooth, and the lower part of the slot cell is fixed by a lower wire holder covering the lower surface of the tooth.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2020-78121 Summary of the Invention

[0006] Technical Problem to be Solved by the Invention

[0007] However, the armature of Patent Document 1 needs to maintain the state of attaching a pair of slot cells to the teeth, and the end of the slot cell is inserted into the wire holder to fix the slot cell. Therefore, such an installation process of attaching the slot cell to the armature is cumbersome and difficult even when relying on manual operation, and it is even more difficult to achieve automation by machinery.

[0008] For this reason, an object of the present invention is to provide a stator, a motor, and an application device that can easily attach an insulating sheet to a core and thus achieve mechanical automation.

[0009] Technical Solution for Solving the Technical Problem

[0010] A stator according to an embodiment of the present invention includes: a core having a cylindrical yoke formed by connecting a plurality of yoke portions, and teeth extending from an inner surface of the yoke portion in a radially inner direction toward an axis of the yoke; a coil wound around the teeth; a pair of insulating members respectively covering both end faces of the core in an axial direction parallel to the axis; and an insulating sheet that insulates between the core and the coil. The insulating sheet has: a tooth insulating portion covering a side surface of the tooth parallel to the axial direction; a yoke insulating portion having one end connected to an outer end of the radially tooth insulating portion, the yoke insulating portion covering an inner surface of the yoke portion; a pair of extension portions respectively extending from the yoke insulating portion in one direction and the other direction in the axial direction; and a bending portion extending from the extension portion and bending in an outward direction opposite to the radially inward direction. The insulating member has a recess formed by being recessed from an inner surface thereof and for fitting the bending portion.

[0011] Advantageous Effects of the Invention

[0012] According to various embodiments of the present invention, an insulating sheet can be easily installed on an iron core, achieving mechanical automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 FIG. 1 is a perspective view of a stator according to Embodiment 1 of the present invention.

[0014] Figure 2 FIG. 2 is a view of a motor including the stator as seen from above.

[0015] Figure 3 FIG. 3 is a perspective view of the stator, an insulating member, and an insulating sheet.

[0016] Figure 4A FIG. 4 is a perspective view of the upper insulating member.

[0017] Figure 4B FIG. 5 is a view of the upper insulating member as seen from below.

[0018] Figure 5 FIG. 6 is a view of the insulating sheet as seen from above and a view of the insulating sheet as seen from the radially inner side.

[0019] Figure 6A FIG. 7 is a view of the insulating sheet being inserted into the second recess.

[0020] Figure 6B FIG. 8 is a view of the insulating sheet being pressed against the side surface of a tooth.

[0021] Figure 7A FIG. 9 is a view of the insulating sheet being pressed against the inner surface of a yoke portion.

[0022] Figure 7B FIG. 10 is a view of the bent portion of the insulating sheet being inserted into the first recess.

[0023] Figure 8A FIG. 11 is a view of a wire being wound around a tooth and a tooth insulating portion on which the insulating sheet is installed.

[0024] Figure 8B FIG. 12 is a view of a coil being covered with a coil insulating portion of the insulating sheet.

[0025] Figure 9 FIG. 13 is a perspective view of the insulating sheet installed on an iron core and an insulating member.

[0026] Figure 10 FIG. 14 is a perspective view of a wire being wound around a tooth and a tooth insulating portion on which the insulating sheet is installed.

[0027] Figure 11 FIG. 15 is a probability diagram of an application device according to Embodiment 3. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] (Embodiment 1)

[0029] <Stator>

[0030] The stator 10 of Embodiment 1 of the present invention, as Figure 1 and Figure 2 shown in the example, includes an iron core 18, a coil 13, and an insulator 30. The iron core 18 has a cylindrical yoke 11. In addition, the axial direction parallel to the axis 11a of the yoke 11 is referred to as the up-down direction. In the radial direction centered on the axis (axis line) 11a of the yoke 11, the direction toward (going to) the axis 11a is referred to as the inner direction (inward direction), and the opposite direction is referred to as the outer direction (outward direction). The direction intersecting the axial direction and the radial direction is referred to as the left-right direction. However, the configuration of the stator 10 is not limited to this.

[0031] The stator 10 is composed of a plurality of ( Figure 1 9 in the example) stator segments 12. The stator segment 12 has: an iron core portion 20 including a yoke portion 21 and teeth 22 ( Figure 8A ); a coil 13 in which a wire 13a ( Figure 8A ) is wound around the teeth 22; and a pair of insulators 30 that respectively cover the upper and lower end faces in the up-down direction, i.e., the upper surface and the lower surface, of the iron core portion 20. The cross-section of the yoke portion 21 orthogonal to the axial direction is substantially arc-shaped, a protrusion 25 extending in the up-down direction from the upper end of one side surface in the left-right direction to the lower end is provided on one side surface, and a recess 26 extending in the up-down direction from the upper end of the other side surface to the lower end is provided on the other side surface. By fitting the protrusion 25 of one yoke portion 21 adjacent to each other with the recess 26 of the other yoke portion 21, the 9 yoke portions 21 are arranged to form a cylindrical yoke 11. And by fixing the yoke portions 21 adjacent to each other in the circumferential direction by means such as welding, the stator 10 can be formed. In this stator 10, the 9 iron core portions 20 are connected to form an annular iron core 18, and the yoke portions 21 in the iron core portions 20 form the yoke 11.

[0032] <Iron core portion>

[0033] As Figure 3 shown in the example, the iron core portion 20 of the stator segment 12 is formed by riveting and fixing a plurality of steel plates laminated in the up-down direction. The iron core portion 20 has a yoke portion 21, teeth 22, and a wide portion 23. The iron core portion 20 has end faces (e.g., orthogonal) intersecting the up-down direction, i.e., the upper surface and the lower surface. Mounting holes 24 are respectively provided on the upper surface and the lower surface. Except for the protrusion 25 and the recess 26, the iron core portion 20 has a shape that is symmetric about the center line extending in the radial direction.

[0034] The yoke portion 21 has an outer surface and an inner surface that cross in the radial direction (e.g., are orthogonal). For example, the outer surface is a curved surface that is substantially arcuate in the left - right direction and linearly extends in the up - down direction, and the inner surface is a planar surface parallel to the up - down direction and the left - right direction. In addition, the yoke portion 21 has a right side surface and a left side surface as side surfaces that cross the left - right direction. A protrusion 25 is provided on the right side surface, and a recess 26 is provided on the left side surface.

[0035] The tooth 22 is disposed at the central position of the yoke portion 21 in the left - right direction and protrudes from the inner surface of the yoke portion 21 in the inner direction of the radial direction (radial inside). Therefore, the inner surface of the yoke portion 21 has a right inner surface disposed at a position to the right of the tooth 22 and a left inner surface disposed at a position to the left of the tooth 22. The tooth 22 is, for example, in the shape of a rectangular parallelepiped and has a right side surface and a left side surface as side surfaces that cross the left - right direction (e.g., are orthogonal), and the right side surface and the left side surface are, for example, planar surfaces.

[0036] The wide - width portion 23 is connected to the inner end of the tooth 22. In the left - right direction, the width of the wide - width portion 23 is greater than the width of the tooth 22 and less than the width of the yoke 11. The wide - width portion 23 has an inner surface and an outer surface that cross the radial direction (e.g., are orthogonal), and side surfaces that cross the left - right direction and connect the inner surface and the outer surface. The inner surface is a curved surface that is substantially arcuate in the left - right direction and linearly extends in the up - down direction. The outer surface is a planar surface that is inclined in the inner direction of the radial direction with respect to the direction away from the tooth 22 in the left - right direction. This outer surface has a right outer surface disposed at a position to the right of the tooth 22 and a left outer surface disposed at a position to the left of the tooth 22, and is opposite to the inner surface of the yoke portion 21 in the radial direction. The space surrounded by the right outer surface of the wide - width portion 23, the right side surface of the tooth 22, and the right inner surface of the yoke portion 21 is used as the right slot 27, and the space surrounded by the left outer surface of the wide - width portion 23, the left side surface of the tooth 22, and the left inner surface of the yoke portion 21 is used as the left slot 27. The wire 13a( Figure 8A ) wound around the tooth 22 to form the coil 13( Figure 8A ) is accommodated in the right slot 27 and the left slot 27.

[0037] <Insulating member>

[0038] As shown in the example of Figures 3 to 4B , the insulating member 30 is made of an electrically insulating resin or the like, and has an insulating member 30 installed above the upper surface of the iron - core portion 20 and an insulating member 30 installed below the lower surface of the iron - core portion 20. Protrusions 35 are respectively provided on the lower surface of the upper insulating member 30 and the upper surface of the lower insulating member 30. By inserting the protrusions 35 into the mounting holes 24 of the iron - core portion 20, the insulating member 30 is installed on the iron - core portion 20.

[0039] The insulating member 30 has a yoke covering portion 31, a tooth covering portion 32, a wide covering portion 33, and a protruding portion 34. An inlet 36 for introducing the wire 13a of the coil 13 is provided in the yoke covering portion 31 of the upper insulating member 30. Except for this inlet 36, the upper insulating member 30 has a shape that is symmetric about the center line extending in the radial direction. The lower insulating member 30 has a shape that is symmetric about the center line extending in the radial direction.

[0040] The yoke covering portion 31 of the upper insulating member 30 covers the upper surface of the yoke portion 21, and the yoke covering portion 31 of the lower insulating member 30 covers the lower surface of the yoke portion 21. The inner surface of the yoke covering portion 31 is planar, and a first concave portion 37 that is recessed from this inner surface toward the outer direction in the radial direction (radially outward) is provided. The first concave portions 37 of the upper yoke covering portion 31 and the lower yoke covering portion 31 each have a first concave portion 37 located on the right side of the tooth covering portion 32 and a first concave portion 37 located on the left side of the tooth covering portion 32 in the left-right direction. The upper first concave portion 37 extends in the up-down direction and opens at the lower surface of the yoke covering portion 31, and the lower first concave portion 37 extends in the up-down direction and opens at the upper surface of the yoke covering portion 31.

[0041] The first concave portion 37 is formed by a first inclined surface 37a and a first locking surface 37b of the yoke covering portion 31 without penetrating (perforating) the yoke covering portion 31 in the radial direction. The angle formed between the first inclined surface 37a and the first locking surface 37b is less than 90 degrees, for example, 45 degrees or less. The first inclined surface 37a of the first concave portion 37 is, for example, a planar shape that is inclined at a certain angle with respect to the inner surface of the yoke covering portion 31, and the farther away from the tooth covering portion 32 in the left-right direction, the more inclined from the inner surface of the yoke covering portion 31 toward the outer direction in the radial direction. The first locking surface 37b of the first concave portion 37 extends from the end of the first inclined surface 37a that is separated from the tooth covering portion 32 in the left-right direction toward the inner direction in the radial direction or in a direction orthogonal to the left-right direction, etc., at an acute angle with respect to the first inclined surface 37a from the end of the first inclined surface 37a toward the inner surface of the yoke covering portion 31.

[0042] In addition, in Figure 3 the example of, the cross-section of the first concave portion 37 with respect to the up-down direction is triangular, but as long as it is formed by the first locking surface 37b, the shape is not limited to this. For example, the cross-section of the first concave portion 37 with respect to the up-down direction may also be quadrilateral. At this time, among the surfaces forming the first concave portion 37, the surface that intersects the left-right direction and is separated from the tooth covering portion 32 can be used as the first locking surface 37b.

[0043] The tooth covering portion 32 of the upper insulating member 30 covers the upper surface of the tooth 22, and the tooth covering portion 32 of the lower insulating member 30 covers the lower surface of the tooth 22. The tooth covering portion 32 protrudes from the inner surface of the yoke covering portion 31 toward the inner direction in the radial direction at the center of the yoke covering portion 31 in the left-right direction.

[0044] The wide-width covering portion 33 of the upper insulating member 30 covers the upper surface of the wide-width portion 23, and the wide-width covering portion 33 of the lower insulating member 30 covers the lower surface of the wide-width portion 23. The inner surface of the wide-width covering portion 33 is curved in an arc shape in the left-right direction. The outer surface of the wide-width covering portion 33 is planar and intersects (e.g., is orthogonal to) the side surfaces (right surface, left surface) of the tooth covering portion 32. Each of the upper second recess 38 and the lower second recess 38 has a right-side second recess 38 on the right side of the tooth covering portion 32 and a left-side second recess 38 on the left side of the tooth covering portion 32 in the left-right direction. The upper second recess 38 that is recessed from the outer surface toward the inner direction in the radial direction is provided in the wide-width covering portion 33. The upper second recess 38 extends in the up-down direction and opens at the lower surface of the wide-width covering portion 33, and the lower second recess 38 extends in the up-down direction and opens at the upper surface of the wide-width covering portion 33.

[0045] The second recess 38 is formed by the second inclined surface 38a and the second engaging surface 38b of the wide-width covering portion 33 without penetrating the wide-width covering portion 33 in the radial direction. The angle between the second inclined surface 38a and the second engaging surface 38b is less than 90 degrees, for example, 45 degrees or less. The second inclined surface 38a of the second recess 38 is, for example, a planar shape inclined at a certain angle with respect to the outer surface of the wide-width covering portion 33, and is inclined more toward the inner direction in the radial direction as it moves away from the tooth covering portion 32 in the left-right direction starting from the outer surface of the wide-width covering portion 33. The second engaging surface 38b of the second recess 38 extends from the end of the second inclined surface 38a that is separated from the tooth covering portion 32 in the left-right direction toward the inner direction in the radial direction or in a direction orthogonal to the left-right direction, etc., in such a manner that the angle formed with the second inclined surface 38a is an acute angle, from the end of the second inclined surface 38a toward the outer surface of the wide-width covering portion 33.

[0046] The protruding portion 34 includes an upper protruding portion 34 that protrudes downward from the upper wide covering portion 33 and a lower protruding portion 34 that protrudes upward from the lower wide covering portion 33. Each of the upper protruding portion 34 and the lower protruding portion 34 has: a right protruding portion 34 that protrudes from the wide covering portion 33 along the right end of the wide portion 23 and a left protruding portion 34 that protrudes from the wide covering portion 33 along the left end of the wide portion 23. The right protruding portion 34 extends in such a manner that the right side portion between the second locking surface 38b of the second recess 38 and the right side surface of the wide covering portion 33 is extended. The left protruding portion 34 extends in such a manner that the left side portion between the second locking surface 38b of the second recess 38 and the left side surface of the wide covering portion 33 is extended. Therefore, the protruding portion 34 has a second locking extension surface 34a that extends the second locking surface 38b.

[0047] As Figure 3 and Figure 4B As shown in the example of, in a state where the insulating member 30 is mounted on the iron core portion 20, the inner surface of the yoke covering portion 31 is arranged so as to have no step difference from the inner surface of the yoke portion 21 and to extend the inner surface of the yoke portion 21, and together with the inner surface of the yoke portion 21, constitutes the outer surface for the slot 27. In addition, the upper yoke covering portion 31 covers the upper surface of the yoke portion 21, and the lower opening of the first recess 37 of the upper yoke covering portion 31 is closed by the upper surface of the yoke portion 21. The lower yoke covering portion 31 covers the lower surface of the yoke portion 21, and the upper opening of the first recess 37 of the lower yoke covering portion 31 is closed by the lower surface of the yoke portion 21. Further, the side surface of the tooth covering portion 32 is arranged so as to have no step difference from the side surface of the tooth 22 and to extend the side surface of the tooth 22, and together with the side surface of the tooth 22, constitutes the side surface for the slot 27.

[0048] The inner surface of the wide covering portion 33 is arranged so as to have no step difference from the inner surface of the wide portion 23 and to extend the inner surface of the wide portion 23. The second inclined surface 38a of the wide covering portion 33 is arranged so as to have no step difference from the outer surface of the wide portion 23 and to extend the outer surface of the wide portion 23, and together with the outer surface of the wide portion 23, constitutes the inner surface for the slot 27. In addition, the upper protruding portion 34 extends downward from the upper end of the wide portion 23 and covers the upper part of the side surface of the wide portion 23. The lower protruding portion 34 extends upward from the lower end of the wide portion 23 of the iron core portion 20 and covers the lower part of the side surface of the wide portion 23. Thus, a gap is provided between the upper protruding portion 34 and the lower protruding portion 34, and at this gap, the side surface of the wide portion 23 is exposed. The protruding portion 34 protrudes radially outward from the outer surface of the wide portion 23. A third recess 39 is formed between the outer surface of the wide portion 23 and the second locking extension surface 34a of the protruding portion 34, and the third recess 39 is connected to the second recess 38 of the wide covering portion 33.

[0049] <Insulating sheet>

[0050] Figure 5 These are the views of the insulating sheet 40 observed from above and the views of the insulating sheet 40 observed from the radially inner side. Figure 5 In (a) of, it is a view of the insulating sheet 40 observed from above, Figure 5 and in (b) of, it is a view of the insulating sheet 40 observed from the radially inner side. As Figure 3 and Figure 5 shown in the example of, the insulating sheet 40 is made of an electrically insulating resin or the like, and is a thin sheet having elasticity and flexibility. The insulating sheet 40 is used to electrically insulate the iron core portion 20 from the coil 13 ( Figure 8A ), and also to electrically insulate the coils 13 ( Figure 2 ) of two adjacent iron core portions 20 from each other. Two such insulating sheets 40 are mounted for one iron core portion 20. Specifically, the right insulating sheet 40 is mounted in the slot 27 on the right side of one iron core portion 20, and the left insulating sheet 40 is mounted in the slot 27 on the left side. The right insulating sheet 40 and the left insulating sheet 40 have a shape symmetrical with respect to a plane containing the center line of the teeth 22 extending in the radial direction and orthogonal to the left - right direction. Therefore, when the right insulating sheet 40 and the left insulating sheet 40 are observed separately, they have the same shape. Hereinafter, the right insulating sheet 40 will be described as a representative.

[0051] The insulating sheet 40 has a shape symmetrical with respect to a plane orthogonal to the up - down direction. The insulating sheet 40 has a coil insulating portion 41, a yoke insulating portion 42, a tooth insulating portion 43, a wide insulating portion 44, and an extending insulating portion 45. The coil insulating portion 41, the yoke insulating portion 42, the tooth insulating portion 43, the wide insulating portion 44, and the extending insulating portion 45 are arranged in this order and integrally formed (formed as one body). The insulating sheet 40 is formed, for example, by cutting and bending a single sheet. Between the coil insulating portion 41, the yoke insulating portion 42, the tooth insulating portion 43, and the wide insulating portion 44, there are provided folding lines (i.e., creases) extending in the up - down direction.

[0052] The coil insulating portion 41 has a rectangular shape and is longer in the up - down direction than the length of the iron core portion 20. The left end of the coil insulating portion 41 is connected to the right end of the yoke insulating portion 42, and the coil insulating portion 41 extends linearly from the right end of the yoke insulating portion 42 in a right - obliquely - outward direction. A folding line 41a extending in the up - down direction is provided between the coil insulating portion 41 and the yoke insulating portion 42. When observed from above, with the folding line 41a as the center, the central angle of the arc from the outer surface of the yoke insulating portion 42 to the outer surface of the coil insulating portion 41 is 90 degrees or more.

[0053] The yoke insulating portion 42 has a rectangular shape and extends in the left - right direction. Its length in the up - down direction is greater than the length of the yoke portion 21, and its length in the left - right direction is the same as or slightly longer than the length of the yoke portion 21, so as to cover the entire inner surface of the yoke portion 21. In addition, since the length of the yoke portion 21 in the up - down direction is less than the length of the interval between the upper first recess 37 and the lower first recess 37 in the stator segment 12 where the insulating member 30 is installed in the iron core portion 20, the yoke insulating portion 42 does not cover the first recess 37. The left end of the yoke insulating portion 42 is connected to the outer end of the tooth insulating portion 43, and the yoke insulating portion 42 extends rightward from the outer end of the tooth insulating portion 43. When viewed from above, taking the broken line between the yoke insulating portion 42 and the tooth insulating portion 43 as the center, the central angle of the arc from the right side surface of the tooth insulating portion 43 to the inner surface of the yoke insulating portion 42 is, for example, 90 degrees or slightly larger than this. An upper extension portion 46 is provided at the upper end of the yoke insulating portion 42, and a lower extension portion 46 is provided at the lower end of the yoke insulating portion 42.

[0054] The upper extension portion 46 extends upward from the upper end of the yoke insulating portion 42, and the lower extension portion 46 extends downward from the lower end of the yoke insulating portion 42. The width of each of the upper extension portion 46 and the lower extension portion 46 in the left - right direction is smaller than that of the yoke insulating portion 42, and each of the upper extension portion 46 and the lower extension portion 46 is arranged at a position to the left of the right end of the yoke insulating portion 42. The extension portion 46 is, for example, trapezoidal in shape, and the width in the left - right direction becomes larger as it gets closer to the end of the yoke insulating portion 42 in the up - down direction. Thereby, the width of the connection portion between each extension portion 46 and the yoke insulating portion 42 can be ensured, and it is possible to prevent each extension portion 46 from being removed from the yoke insulating portion 42.

[0055] The upper extension portion 46 is provided with a cutout in such a way that its left end inclines obliquely upward to the right from the upper end of the yoke insulating portion 42. The lower extension portion 46 is provided with a cutout in such a way that its left end inclines obliquely downward to the right from the lower end of the yoke insulating portion 42. As Figure 9 and Figure 10 shown in the example, by using this cutout, it is possible to prevent the yoke insulating portion 42 from blocking the inlet 36 of the yoke covering portion 31, so that the wire 13a of the coil 13 can be easily introduced into the slot 27 from the inlet 36. In addition, as Figure 3 and Figure 5 shown in the example, an upper bent portion 47 is connected to the upper extension portion 46, and a lower bent portion 47 is connected to the lower extension portion 46. A space separated in the up - down direction is formed between the lower end of the upper bent portion 47 and the upper end of the yoke insulating portion 42, and a space separated in the up - down direction is also formed between the upper end of the lower bent portion 47 and the lower end of the yoke insulating portion 42.

[0056] The bent portion 47 has a rectangular shape, its left end is connected to the right end of the extended portion 46, and it extends from the extended portion 46 and bends outward in the radial direction. The bent portion 47 extends from the extended portion 46 in a direction away from the tooth insulating portion 43 in the left-right direction, and bends from the extended portion 46 in such a manner that the right end, which is closer to the front end than the left end as the root end, is located on the outer side in the radial direction. Thus, a broken line extending in the up-down direction is provided between the extended portion 46 and the bent portion 47. When viewed from above, the central angle of the arc from the outer surface of the extended portion 46 to the outer surface of the bent portion 47 with the broken line between the extended portion 46 and the bent portion 47 as the center is, for example, 90 degrees or more. In the left-right direction, the right end 47a of the bent portion 47 is arranged at a position to the left of the right end of the yoke insulating portion 42. Therefore, as shown in the examples of Figure 9 and Figure 10 , the extended portion 46 is arranged on the inner surface of the yoke insulating portion 42 to the left of the first recess 37, the bent portion 47 is fitted into the first recess 37, and the right end of the bent portion 47 is locked to the first locking surface 37b.

[0057] As Figure 3 and Figure 5 show, the tooth insulating portion 43 has a rectangular shape and extends in the radial direction. Its length in the up-down direction is equal to or greater than the length of the tooth 22, and its length in the radial direction is the same as or substantially the same as the length of the tooth 22, so that the entire side surface of the tooth 22 parallel to the up-down direction can be covered. The inner end of the tooth insulating portion 43 is connected to the left end of the wide insulating portion 44. When viewed from above, the central angle of the arc from the outer surface of the wide insulating portion 44 to the right side surface of the tooth insulating portion 43 with the broken line between the wide insulating portion 44 and the tooth insulating portion 43 as the center is, for example, slightly greater than 90 degrees.

[0058] The wide insulating portion 44 has a rectangular shape. Its length in the up-down direction is equal to or greater than the length of the wide portion 23, and it is the same as or substantially the same as the length of the wide portion 23 in the inclined direction along the outer surface of the wide portion 23, so that the entire outer surface of the wide portion 23 can be covered. The left end of the wide insulating portion 44 is connected to the inner end of the tooth insulating portion 43, and the wide insulating portion 44 inclines inward (to the inside) as it goes from the inner end of the tooth insulating portion 43 to the right. The right end 44a of the wide insulating portion 44 is farther from the tooth insulating portion 43 in the left-right direction than its left end, and is the locking end that locks to the protruding portion 34 of the insulating member 30.

[0059] The left end of the extended insulating portion 45 is connected to the right end of the wide insulating portion 44. The extended insulating portion 45 is inclined inward (toward the inside) as it extends from the right end 44a of the wide insulating portion 44 toward the right side, so as to extend the wide insulating portion 44. Therefore, no fold line is provided between the extended insulating portion 45 and the wide insulating portion 44. A cutout is provided in the extended insulating portion 45. In the vertical direction, the length of the extended insulating portion 45 is shorter than that of the wide insulating portion 44. The extended insulating portion 45 is disposed at the central position in the vertical direction of the wide insulating portion 44. The right end 44a of the wide insulating portion 44 extends upward and downward beyond the extended insulating portion 45. Therefore, the cutout of the extended insulating portion 45 is located at the upper end portion and the lower end portion of the extended insulating portion 45. As shown in the example of Figure 9 and Figure 10 , in the vertical direction, the length of the extended insulating portion 45 is the same as or slightly smaller than the length between the lower end of the upper protruding portion 34 and the upper end of the lower protruding portion 34. The extended insulating portion 45 is fitted into its cutout by the protruding portion 34 and protrudes to the right from between the upper protruding portion 34 and the lower protruding portion 34.

[0060] <Method for manufacturing a stator>

[0061] As shown in the example of Figure 3 , the protrusion 35 of the upper insulating member 30 is inserted into the mounting hole 24 on the upper surface of the iron core portion 20, and the protrusion 35 of the lower insulating member 30 is inserted into the mounting hole 24 on the lower surface of the iron core portion 20, thereby mounting the upper insulating member 30 and the lower insulating member 30 on the iron core portion 20. Subsequently, as shown in the example of Figure 6A , the extended insulating portion 45 is inserted between the upper protruding portion 34 and the lower protruding portion 34. Thereby, the upper end of the extended insulating portion 45 is caught by the lower end of the upper protruding portion 34, and the lower end of the extended insulating portion 45 is caught by the upper end of the upper protruding portion 34, thus achieving the positioning of the insulating sheet 40 relative to the iron core portion 20 in the vertical direction.

[0062] Next, after inserting the right end 44a of the wide insulating portion 44 of the insulating sheet 40 into the second recess 38 and the third recess 39, it is pressed against the outer surface of the wide portion 23. At this time, the right end 44a of the wide insulating portion 44 serves as a catching end and is caught by the second catching surface 38b and the second catching extension surface 34a. The wide insulating portion 44 rotates inward about the right end 44a of the wide insulating portion 44. Therefore, the outer surface of the wide portion 23 can be easily covered by the wide insulating portion 44.

[0063] Next, as shown in Figure 6BAs shown in the example of , the tooth insulating portion 43 is pressed against the side surface of the tooth 22. At this time, the fold line between the wide insulating portion 44 and the tooth insulating portion 43 is fitted into the corner between the wide portion 23 and the tooth 22. Centering on the inner end of the tooth insulating portion 43 that constitutes this fold line, the tooth insulating portion 43 rotates leftward, so that the side surface of the tooth 22 can be easily covered by the tooth insulating portion 43.

[0064] Next, as Figure 7A As shown in the example of , the yoke insulating portion 42 is pressed against the inner surface of the yoke portion 21. At this time, the fold line between the tooth insulating portion 43 and the yoke insulating portion 42 is fitted into the corner between the tooth 22 and the yoke portion 21. Centering on the left end of the yoke insulating portion 42 that constitutes this fold line, the yoke insulating portion 42 rotates outward, so that the inner surface of the yoke portion 21 can be easily covered by the yoke insulating portion 42. Since the yoke insulating portion 42 and the wide insulating portion 44 are arranged sandwiching the tooth insulating portion 43 in the radial direction and are supported by the yoke portion 21 and the wide portion 23 in the radial direction, the movement of the insulating sheet 40 in the radial direction is restricted and it is held by the iron core portion 20 in the radial direction.

[0065] In addition, as Figure 7B As shown in the example of , the yoke insulating portion 42 is connected to the upper bent portion 47 via the upper extension portion 46 and to the lower bent portion 47 via the lower extension portion 46. Therefore, the upper bent portion 47 and the lower bent portion 47 move outward together with the yoke insulating portion 42. Here, the upper first recess 37 is arranged at a position outside the upper bent portion 47 and faces the upper bent portion 47. The lower first recess 37 is arranged at a position outside the lower bent portion 47 and faces the lower bent portion 47. In addition, the bent portion 47 is bent outward in the radial direction compared to the yoke insulating portion 42. Therefore, as the yoke insulating portion 42 rotates, the bent portion 47 is inserted into the first recess 37. The bent portion 47 extends obliquely outward to the right along the first inclined surface 37a, and the right end 47a of the bent portion 47 faces the first locking surface 37b and is locked by the first locking surface 37b. In this way, by locking both the upper bent portion 47 and the lower bent portion 47, the movement of the insulating sheet 40 to the right is restricted and it is held by the iron core portion 20 in the left-right direction. In this way, after inserting the extended insulating portion 45 of the insulating sheet 40 between the upper protrusion 34 and the lower protrusion 34, the wide insulating portion 44, the tooth insulating portion 43, and the yoke insulating portion 42 are sequentially pressed (crimped) against the iron core portion 20, thereby mounting the insulating sheet 40 on the iron core portion 20. Therefore, the mounting of the insulating sheet 40 to the iron core portion 20 of the iron core 18 can be made easy and mechanical automation can be achieved.

[0066] In this way, the insulating sheet 40 on the right side is fitted into the groove 27 on the right side and mounted on the iron core portion 20. In addition, as Figure 8AAs shown in the example of , similar to the insulating sheet 40 on the right side, the insulating sheet 40 on the left side is fitted into the groove 27 on the left side and installed on the iron core portion 20. The coil insulating portion 41 of these insulating sheets 40 is inclined outward in the radial direction with respect to the yoke insulating portion 42. In addition, the first recess 37 for fixing the insulating sheet 40 to the iron core portion 20 is recessed from the inner surface of the yoke covering portion 31, and the bent portion 47 is fitted into the first recess 37, so these portions do not protrude from the inner surface of the yoke covering portion 31. Thus, the coil insulating portion 41 and the bent portion 47 do not intrude into the path when the wire 13a is wound around the tooth 22 and the tooth covering portion 32. Therefore, the wire 13a can be easily wound around the tooth 22 and the tooth covering portion 32 without being obstructed by the coil insulating portion 41 and the bent portion 47. In addition, an insulating sheet 40 is sandwiched between the coil 13 wound with the wire 13a and the iron core portion 20 around the groove 27 accommodating the coil 13, and the iron core portion 20 and the coil 13 are electrically insulated by the insulating sheet 40.

[0067] Next, as shown in the example of Figure 8B , by bending the coil insulating portion 41 on the right side and the coil insulating portion 41 on the left side inward, the coil insulating portion 41 covers the coil 13. Thus, the stator segment 12 is formed. In this way, as shown in the example of Figure 1 , the yoke portions 21 of the 9 stator segments 12 are fixed by welding or the like to form the stator 10. In this stator 10, as shown in the example of Figure 2 , between the adjacent stator segments 12, since the coil insulating portion 41 is interposed between the coils 13, electrical insulation between the coils 13 can be achieved.

[0068] (Embodiment 2)

[0069] As shown in the example of Figure 2 , the motor 14 according to Embodiment 2 of the present invention includes, in addition to the stator 10 of Embodiment 1, a rotor 15 and a housing 16. The housing 16 houses the stator 10 and the rotor 15 and is fixed to the stator 10. The rotor 15 has a cylindrical rotating core 15a and a cylindrical rotating shaft 15b. In the rotating core 15a, a plurality of steel plates laminated in the vertical direction are fixed by riveting, and permanent magnets are embedded therein. The rotating shaft 15b is inserted into the central hole of the rotating core 15a and fixed to the rotating core 15a. The rotor 15 is disposed coaxially with the stator 10 inside the stator 10 and is rotatably supported by the housing 16 via bearings. The outer peripheral surface of the rotor 15 faces the inner peripheral surface of the stator 10 with a gap therebetween. A motor (motor) is exemplified as the motor 14. The stator 10 of the motor 14 can facilitate the installation of the insulating sheet 40 on the iron core portion 20 of the iron core 18, thereby realizing mechanical automation. Therefore, the manufacturing efficiency of the motor 14 can be improved.

[0070] (Embodiment 3)

[0071] As Figure 11 shown in the example of Figure 11 , the application device 17 of the third embodiment of the present invention has a built-in motor 14 and is driven by the motor 14. An example of the application device 17 is a refrigerant compressor. This refrigerant compressor is provided, for example, in devices such as a refrigeration device and an air-conditioning device. More specifically, devices having a refrigerant compressor can include, for example, a refrigerator, a freezer, an air conditioner, a display case, and a vending machine. In addition, as the application device 17, various devices such as a blower, a pump, and a driving source for vehicle travel can be exemplified in addition to the refrigerant compressor. The stator 10 of the motor 14 in the application device 17 can facilitate the installation of the insulating sheet 40 on the core portion 20 of the core 18, thereby realizing mechanical automation. Therefore, the manufacturing efficiency of the application device 17 can be improved.

[0072] In addition, based on the above description, those skilled in the art can know various improvements and other embodiments of the present invention. Therefore, the above description should only be used as an exemplary explanation, and its purpose is to teach those skilled in the art the best way to implement the present invention. Without departing from the spirit of the present invention, substantial changes can be made to its structure and / or functional details.

[0073] (Other embodiments)

[0074] (Supplementary note)

[0075] Based on the description of the above embodiments, the following technologies are disclosed.

[0076] The first technology is a stator, which includes: a core having a cylindrical yoke formed by connecting a plurality of yoke portions and teeth extending from the inner surface of the yoke portion in the inner direction of the radial direction of the axis of the yoke; a coil formed by winding a wire around the teeth; a pair of insulating members respectively covering the two end faces of the core in the axial direction parallel to the axis; and an insulating sheet for insulating between the core and the coil. The insulating sheet has: a tooth insulating portion covering the side surface of the tooth parallel to the axial direction; a yoke insulating portion having one end connected to the outer end in the radial direction of the tooth insulating portion, and the yoke insulating portion covering the inner surface of the yoke portion; a pair of extending portions respectively extending from the yoke insulating portion in one direction and the other direction in the axial direction; and a bending portion extending from the extending portion and bending in the outer direction opposite to the inner direction of the radial direction. The insulating member has a recess formed by being recessed from its inner surface and into which the bending portion can be fitted.

[0077] According to this structure, after the insulating member is installed on the iron core, the insulating sheet can be installed on the iron core and the insulating member by fitting the bent portion of the insulating sheet into the recessed portion recessed from the inner surface of the insulating member. Therefore, the installation of the insulating sheet on the iron core can be easily changed, and mechanical automation can be achieved. In addition, since the recessed portion and the bent portion do not protrude from the inner surface of the insulating member, the wire can be easily wound around the teeth.

[0078] The second technique is as follows: In the stator of the first technique, the bent portion extends from the extended portion in a direction away from the teeth in a crossing direction that crosses the axial direction and the radial direction, and is bent from the extended portion in such a manner that the front end in the crossing direction is located outside the radial direction with respect to the root end, and the recessed portion is formed by a locking surface that locks the front end of the bent portion in the crossing direction. According to this structure, by locking the front end of the bent portion by the locking surface, the insulating sheet can be prevented from detaching from the teeth of the iron core. Therefore, the installation of the insulating sheet on the iron core can be made easy, and mechanical automation can be achieved. Moreover, the wire can be easily wound around the teeth without using a jig for pre-fixing the insulating sheet to the iron core.

[0079] The third technique is as follows: In the stator of the first technique or the second technique, the recessed portion is formed by an inclined surface that inclines from the inner surface of the insulating member in such a manner that it goes more radially outward (in the outer radial direction) in the crossing direction that crosses the axial direction and the radial direction as it goes further away from the teeth. According to this structure, a recessed portion for fitting the bent portion can be provided in the insulating member, and the thickness of the insulating member in the radial direction can be ensured. Therefore, the reduction in the strength of the insulating member caused by the recessed portion can be reduced.

[0080] The fourth technique is as follows: In the stator of any one of the first to third techniques, the iron core has a wide-width portion that is provided in such a manner that the teeth are sandwiched between it and the yoke portion in the radial direction, and the width of the wide-width portion in the crossing direction that crosses the axial direction and the radial direction is greater than the width of the teeth. The insulating member has: a wide-width covering portion that covers the end face of the wide-width portion; and a protruding portion that protrudes from the end portion of the wide-width covering portion in the crossing direction of the wide-width portion. The insulating sheet has a wide-width insulating portion that covers the outer surface of the wide-width portion, one end of which is connected to the inner end in the radial direction of the tooth insulating portion, and the wide-width insulating portion has the other end that is spaced apart from the tooth insulating portion in the crossing direction that crosses the axial direction and the radial direction, and this other end is a locking end that can be locked to the protruding portion.

[0081] According to this structure, the locking end of the wide insulating part is locked to the protruding part, and the wide insulating part is rotated around the locking end and pressed against the wide part. Further, the tooth insulating part is rotated around the inner end of the tooth insulating part connected to the wide insulating part and pressed against the tooth. Further, the yoke insulating part is rotated around the outer end of the tooth insulating part and pressed against the yoke part. In this way, by pressing the insulating sheet in sequence according to the order of the wide part, tooth and yoke part of the iron core, the iron core can be covered by the insulating sheet, so the insulating sheet can be easily installed on the iron core, realizing mechanical automation.

[0082] The fifth technology is: in the stator of the fourth technology, the wide insulating part has an extended insulating part extending from the locking end in a direction intersecting with the axial direction, and the extended insulating part protrudes between a pair of the protruding parts in the axial direction. According to this structure, by making the extended insulating part protrude between a pair of protruding parts, the extended insulating part can be locked by the pair of protruding parts in the axial direction, so the insulating sheet can be positioned on the iron core in the axial direction. Thereby, the installation of the insulating sheet on the iron core can be made easy, realizing mechanical automation.

[0083] The sixth technology is: in the stator of any one of the first technology to the fifth technology, the insulating sheet has: a coil insulating part, which is connected to the other end of the yoke insulating part that is farther from the tooth than one end of the yoke insulating part in the intersecting direction intersecting with the axial direction and the radial direction, and covers the coil; and a folded line extending in the axial direction between the yoke insulating part and the coil insulating part.

[0084] According to this structure, when the wire is wound around the tooth on which the insulating sheet is installed, by bending the coil insulating part relative to the yoke insulating part in the outer direction in the radial direction at the folded line of the insulating sheet, the wire is not likely to touch the coil insulating part. Therefore, it is easy to wind the wire around the tooth, and the automation of stator assembly can be realized.

[0085] The seventh technology is: in the stator of any one of the first technology to the sixth technology, the insulating sheet has a shape symmetric about a plane orthogonal to the axial direction. According to this structure, by flipping one type of insulating sheet about a plane orthogonal to the axial direction, it can be respectively installed on one side surface and the other side surface of the tooth in the intersecting direction. Therefore, there is no need to separately prepare the insulating sheet for one side surface of the tooth and the insulating sheet for the other side surface of the tooth, the type of the insulating sheet can be controlled to one type, and the manufacturing cost of the stator can be effectively reduced.

[0086] The eighth technology is: a motor including the stator of any one of the first technology to the seventh technology. According to this structure, the installation of the insulating sheet on the iron core in the stator of the motor can be made easy, realizing mechanical automation. Therefore, the manufacturing efficiency of the motor including this stator can be realized.

[0087] The ninth technology is: an application device, which includes the motor of the eighth technology. According to this structure, the installation of the insulating sheet on the iron core in the stator of the application device becomes easy, and mechanical automation can be achieved. Therefore, the manufacturing efficiency of the application device including this stator can be improved.

[0088] Description of reference numerals

[0089] 10: Stator; 11: Yoke; 11a: Shaft

[0090] 13: Coil; 13a: Lead wire; 14: Motor

[0091] 17: Application device; 18: Iron core; 21: Yoke portion

[0092] 22: Tooth; 23: Wide portion; 30: Insulating member

[0093] 33: Wide covering portion; 34: Protruding portion; 37: First recess (recess)

[0094] 37a: First inclined surface (inclined surface)

[0095] 37b: First locking surface (locking surface)

[0096] 40: Insulating sheet; 41: Coil insulating portion; 41a: Fold line

[0097] 42: Yoke insulating portion; 43: Tooth insulating portion; 44: Wide insulating portion

[0098] 44a: Right end (locking end)

[0099] 45: Extended insulating portion; 46: Extension portion; 47: Bending portion.

Claims

1. A stator, characterized in that, Comprising: A core having a cylindrical yoke formed by connecting a plurality of yoke portions, and teeth extending from the inner surface of the yoke portion in the radially inner direction toward the axis of the yoke; A coil formed by winding a wire around the teeth; A pair of insulating members respectively covering the axial end faces of the core parallel to the axis; and An insulating sheet insulating between the core and the coil, The insulating sheet has: A tooth insulating portion covering the side surface of the tooth parallel to the axial direction; A yoke insulating portion having one end connected to the radially outer end of the tooth insulating portion, the yoke insulating portion covering the inner surface of the yoke portion; A pair of extension portions extending from the yoke insulating portion in one direction and the other direction in the axial direction respectively; And A bent portion extending from the extension portion and bending in the outer direction opposite to the radially inner direction, The insulating member has a recess formed by recessing from its inner surface and into which the bent portion can be fitted.

2. The stator according to claim 1, wherein ：： The bent portion extends from the extension portion in a crossing direction crossing the axial direction and the radial direction away from the tooth, and bends from the extension portion such that the front end in the crossing direction is located outside the radial direction with respect to the root end. The recess is formed by a locking surface that locks the front end of the bent portion in the crossing direction.

3. The stator according to claim 1, wherein ：： The recess is formed by an inclined surface that inclines from the inner surface of the insulating member such that it goes more radially outward in the crossing direction away from the tooth.

4. The stator according to claim 1, wherein: The core has a wide portion provided such that the tooth is sandwiched between it and the yoke portion in the radial direction, and the width of the wide portion in the crossing direction crossing the axial direction and the radial direction is greater than the width of the tooth. The insulating member has: A wide covering portion covering the end face of the wide portion; And A protruding portion protruding from the end portion of the wide covering portion in the crossing direction of the wide portion. The insulating sheet has a wide insulating portion covering the outer surface of the wide portion, one end of the wide insulating portion being connected to the radially inner end of the tooth insulating portion. The wide insulating portion has the other end spaced apart from the tooth insulating portion in the crossing direction crossing the axial direction and the radial direction, and the other end is a locking end that can be locked to the protruding portion.

5. The stator according to claim 4, wherein: The wide insulating portion has an extended insulating portion extending in a direction crossing the axial direction from the locking end. The extended insulating portion protrudes between the pair of protruding portions in the axial direction.

6. The stator according to claim 1, wherein: The insulating sheet has: A coil insulating portion connected to the other end of the yoke insulating portion farther from the tooth than one end of the yoke insulating portion in the crossing direction crossing the axial direction and the radial direction, and covering the coil; and A folded line extending in the axial direction between the yoke insulating portion and the coil insulating portion.

7. The stator according to claim 1, wherein: The insulating sheet has a shape symmetric about a plane orthogonal to the axial direction.

8. A motor, characterized in that: It includes the stator according to any one of claims 1 to 7.

9. An application device, characterized in that: It includes the motor according to claim 8.

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