Stator and motor

Abstract

A stator and a motor are provided. A stator (20A) is provided with: a stator core (30A) comprising a molded body of magnetic powder, the stator core (30A) having an annular yoke section (31) extending in the circumferential direction and a tooth section (32) protruding in the radial direction of the yoke section (31) from the inner circumferential surface (31d) of the yoke section (31); a coil (40A) comprising a winding (41) wound around the teeth (32); and a terminal member (50A). The stator core (30A) has a column portion (51) extending in the axial direction of the stator core (30A), a first fixing portion (52) provided at one end of the column portion (51) in the axial direction so as to protrude further toward the inner peripheral surface (31d) side of the yoke portion (31) than the column portion (51) in the radial direction, and a second fixing portion (53) provided at the other end of the column portion (51) in the axial direction so as to protrude further toward the inner peripheral surface (31d) side of the yoke portion (31) than the column portion (51) in the radial direction. The yoke portion (31) has a first end face (31a) and a second end face (31b) which face each other in the axial direction, the terminal member (50A) sandwiches the yoke portion (31) in the axial direction, the column portion (51) faces an outer circumferential surface (31c) of the yoke portion (31) in the radial direction, the first fixing portion (52) faces the first end face (31a) of the yoke portion (31), and the second fixing portion (53) faces the second end face (31b) of the yoke portion (31). One end portion (41a) of the winding (41) is fixed in a state of being wound around the terminal portion (54).

Description

Technical Field

[0001] The present invention relates to a stator and a motor. Background Art

[0002] Patent document 1 discloses an electric motor comprising: a rotor having a plurality of magnetic poles separated in a circumferential direction and a stator surrounding the rotor, the stator including an annular stator core formed by molding magnetic powder, the stator core having: an annular yoke portion and a plurality of teeth protruding from the inner periphery of the yoke portion and separated from each other by slots in the circumferential direction of the yoke portion, and slots for coil winding are provided at both ends of the stator core in the axial direction corresponding to each tooth portion.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2008-61408

[0004] In the electric motor described in Patent Document 1, a bus bar is used to electrically lead out the coil. Figure 4 As shown in the patent document 1, the busbar connected with the coil is fixed to the stator core by threaded connection. However, in the electric motor described in patent document 1, when the busbar is fixed to the stator core by threaded connection, after the stator core is manufactured, additional processing of forming threaded holes on the stator core is required, which leads to low working efficiency in the process of fixing the busbar to the stator core. Moreover, in the electric motor described in patent document 1, the stator core is damaged when the threaded holes are formed, which leads to a decrease in the strength of the stator core, and as a result, the fixing strength of the busbar relative to the stator core is reduced. As a result, in the electric motor described in patent document 1, there is room for improvement in terms of improving the working efficiency during installation and the fixing strength after installation for the busbar used for electrically leading the coil. Summary of the invention

[0005] The present invention is made to solve the above-mentioned problems, and aims to provide a stator that can improve the work efficiency during installation and the fixing strength after installation of terminal members for electrically extracting coils. In addition, the present invention aims to provide a motor having the above-mentioned stator.

[0006] The stator of the present invention is characterized in that it comprises: a stator core, which has an annular yoke along the circumferential direction and a tooth portion protruding from the inner peripheral surface of the yoke in the radial direction of the yoke, and is composed of a molded body of magnetic powder; a coil, which is composed of a winding wound around the tooth portion; and a terminal member, which has a column portion extending in the axial direction of the stator core, a first fixing portion provided at one end of the column portion in the axial direction and protruding toward the inner peripheral surface side of the yoke portion in the radial direction more than the column portion, and a first fixing portion provided at one end of the column portion in the axial direction and protruding toward the inner peripheral surface side of the yoke portion in the radial direction more than the column portion. A second fixing portion is disposed at the other end of the column portion in the axial direction, and a terminal portion is provided at the first fixing portion so as to protrude from the first fixing portion, the yoke portion has a first end face and a second end face which are opposite to each other in the axial direction, the terminal member clamps the yoke portion in the axial direction, and makes the outer peripheral surfaces of the column portion and the yoke portion in the radial direction face each other, the first fixing portion faces the first end face of the yoke portion, and the second fixing portion faces the second end face of the yoke portion, and one end of the winding is fixed in a state of being wound around the terminal portion.

[0007] A motor according to the present invention is characterized by comprising: the stator according to the present invention; and a rotor disposed facing an inner peripheral surface of the stator.

[0008] According to the present invention, it is possible to provide a stator that can improve the work efficiency during installation and the fixing strength after installation of a terminal member for electrically extracting a coil. In addition, according to the present invention, it is possible to provide a motor having the above-mentioned stator. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic perspective view showing an example of a stator according to Embodiment 1 of the present invention.

[0010] Figure 2 It means to observe from the inside. Figure 1 A three-dimensional schematic diagram of the state of the coil unit in FIG.

[0011] Figure 3 It means to observe from the outside Figure 1 A three-dimensional schematic diagram of the state of the coil unit in FIG.

[0012] Figure 4 Yes means Figure 2 and Figure 3 A three-dimensional schematic diagram of the split iron core in FIG.

[0013] Figure 5 Yes means Figure 2 and Figure 3 A three-dimensional schematic diagram of the terminal component.

[0014] Figure 6Yes means Figure 5 A schematic cross-sectional view of a portion of the terminal member along line segment AA'.

[0015] Figure 7 It means in Figure 1 The schematic three-dimensional view shows a state where the stator is installed with a housing.

[0016] Figure 8 It is a perspective schematic diagram showing an example of a coil unit constituting a stator according to Embodiment 2 of the present invention.

[0017] Fig. 9 Yes means Figure 8 A three-dimensional schematic diagram of the split iron core in FIG.

[0018] Fig.10 Yes means Figure 8 A three-dimensional schematic diagram of the terminal component.

[0019] Fig.11 It is a perspective schematic diagram showing an example of a coil unit constituting a stator according to a third embodiment of the present invention.

[0020] Fig.12 Yes means Fig.11 A three-dimensional schematic diagram of the split iron core in FIG.

[0021] Fig.13 Yes means Fig.11 A three-dimensional schematic diagram of the terminal component.

[0022] Fig.14 It is a perspective schematic diagram showing an example of a coil unit constituting a stator according to a fourth embodiment of the present invention.

[0023] Fig.15 Yes means Fig.14 A three-dimensional schematic diagram of the split iron core in FIG.

[0024] Fig.16 Yes means Fig.14 A three-dimensional schematic diagram of the terminal component.

[0025] Fig.17 It is a perspective schematic diagram showing an example of a coil unit constituting a stator according to Embodiment 5 of the present invention.

[0026] Fig.18 Yes means Fig.17 A three-dimensional schematic diagram of the split iron core in FIG.

[0027] Fig.19 Yes means Fig.17 A three-dimensional schematic diagram of the terminal component.

[0028] Fig. 20It is a perspective schematic diagram showing an example of a coil unit constituting a stator according to Embodiment 6 of the present invention.

[0029] Fig.21 Yes means Fig. 20 A three-dimensional schematic diagram of the split iron core in FIG.

[0030] Fig. 22 Yes means Fig. 20 A three-dimensional schematic diagram of the terminal component.

[0031] Fig.23 It is a perspective schematic diagram showing an example of a coil unit constituting a stator according to a seventh embodiment of the present invention.

[0032] Fig.24 Yes means Fig.23 A three-dimensional schematic diagram of the split iron core in FIG.

[0033] Fig.25 Yes means Fig.23 A three-dimensional schematic diagram of the terminal component.

[0034] Fig.26 It is a perspective schematic diagram showing an example of a coil unit constituting a stator according to an eighth embodiment of the present invention.

[0035] Fig. 27 Yes means Fig.26 A three-dimensional schematic diagram of the split iron core in FIG.

[0036] Fig.28 Yes means Fig.26 A three-dimensional schematic diagram of the terminal component.

[0037] Fig.29 It is a perspective schematic diagram showing an example of a stator according to Embodiment 9 of the present invention.

[0038] Fig.30 It is a perspective schematic diagram showing an example of the motor of the present invention. DETAILED DESCRIPTION

[0039] The stator of the present invention and the motor of the present invention are described below. In addition, the present invention is not limited to the following structure, and can also be appropriately changed within the scope of the main purpose of the present invention. In addition, the present invention is also a method of combining multiple preferred structures described below.

[0040] The embodiments shown below are illustrative, and it is of course possible to partially replace or combine the structures shown in different embodiments. In the description of embodiment 2 and thereafter, the description of matters shared with embodiment 1 is omitted, and the differences are mainly described. In particular, the same effects played by the same structure are not mentioned in sequence in each embodiment.

[0041] In the following description, when the embodiments are not particularly distinguished, they are simply referred to as "the stator of the present invention" and "the motor of the present invention".

[0042] The drawings shown below are schematic diagrams, and their dimensions, aspect ratios, and other aspects may differ from those of actual products.

[0043] In this specification, terms indicating the relationship between elements (for example, "parallel", "orthogonal", etc.) and terms indicating the shape of elements refer not only to strict terms like words, but also to substantially equivalent ranges, for example, a range including a difference of about several %.

[0044] [stator]

[0045] The stator of the present invention is characterized in that it comprises: a stator core, which has an annular yoke along the circumferential direction and a tooth portion protruding from the inner peripheral surface of the yoke in the radial direction of the yoke, and is composed of a molded body of magnetic powder; a coil, which is composed of a winding wound on the tooth portion; and a terminal member, which has a column portion extending in the axial direction of the stator core, a first fixing portion provided at one end of the column portion in the axial direction and protruding toward the inner peripheral surface of the yoke in the radial direction more than the column portion, and a first fixing portion protruding toward the inner peripheral surface of the yoke in the radial direction more than the column portion. A second fixing portion is arranged at the other end of the above-mentioned column portion in the above-mentioned axial direction, and a terminal portion is arranged on the above-mentioned first fixing portion so as to protrude from the above-mentioned first fixing portion, the above-mentioned yoke portion has a first end face and a second end face opposite to each other in the above-mentioned axial direction, the above-mentioned terminal member clamps the above-mentioned yoke portion in the above-mentioned axial direction so that the outer peripheral surfaces of the above-mentioned column portion and the above-mentioned yoke portion in the above-mentioned radial direction face each other, the above-mentioned first fixing portion faces the above-mentioned first end face of the above-mentioned yoke portion, and the above-mentioned second fixing portion faces the above-mentioned second end face of the above-mentioned yoke portion, and one end portion of the above-mentioned winding is fixed in a state of being wound around the above-mentioned terminal portion.

[0046] <Implementation method 1>

[0047] In the stator of the first embodiment of the present invention, the first end face of the yoke is engaged with the first fixing portion. More specifically, in the stator of the first embodiment of the present invention, a first groove is provided on the first end face of the yoke, the first groove is opened radially toward the outer peripheral surface side of the yoke, and the first groove is engaged with the first fixing portion.

[0048] In the stator of embodiment 1 of the present invention, the second end face of the yoke is engaged with the second fixing portion. More specifically, in the stator of embodiment 1 of the present invention, a second groove is provided on the second end face of the yoke, the second groove opens radially toward the outer peripheral surface side of the yoke, and the second groove is engaged with the second fixing portion.

[0049] Figure 1 This is a schematic perspective view showing an example of a stator according to Embodiment 1 of the present invention.

[0050] Figure 1 The stator 20A shown includes a stator core 30A, a plurality of coils 40A, and a plurality of terminal members 50A.

[0051] The stator core 30A has a yoke portion (also referred to as a core back) 31 and a plurality of teeth portions 32 .

[0052] In this specification, the direction in which the axis of the stator core extends is defined as the axial direction. In addition, the direction along the outer peripheral surface of the yoke when viewed from the axial direction is defined as the circumferential direction. Moreover, the direction orthogonal to the axial direction and in which the outer peripheral surface and the inner peripheral surface of the yoke are opposite is defined as the radial direction.

[0053] The yoke 31 has an annular shape along the circumferential direction.

[0054] The yoke 31 has a first end surface 31 a and a second end surface 31 b that are opposed to each other in the axial direction.

[0055] The yoke 31 has an outer peripheral surface 31 c and an inner peripheral surface 31 d which are opposed to each other in the radial direction.

[0056] The plurality of teeth 32 are spaced apart from each other in the circumferential direction and independently protrude from the inner circumferential surface 31d of the yoke 31 in the radial direction of the yoke 31. In this way, the plurality of teeth 32 and the yoke 31 are integrated.

[0057] In this specification, two elements being integrated means a state where no interface exists between the elements, for example, a state where the boundary between the elements cannot be discerned.

[0058] The stator core 30A is formed of a molded body of magnetic powder. In other words, the yoke 31 and the teeth 32 are formed by integrating the molded body of magnetic powder.

[0059] The stator core 30A is preferably formed of a powder core. In other words, the yoke 31 and the teeth 32 are preferably formed by integrating the powder core.

[0060] The stator core 30A may be formed not of a powder core but of a molded body of a composite material containing magnetic powder and resin.

[0061] Each of the plurality of coils 40A is constituted by a winding 41 wound around the teeth portion 32. The plurality of coils 40A are spaced apart from each other in the circumferential direction and are independently provided on the teeth portion 32.

[0062] Each of the plurality of coils 40A is insulated from the teeth portion 32 via an insulating member described later, for example.

[0063] The windings 41 of the plurality of coils 40A are connected, for example, in series.

[0064] As the winding 41, for example, polyurethane copper wire (UEW) or the like can be cited.

[0065] Each of the plurality of terminal members 50A includes a column portion 51 , a first fixing portion 52 , a second fixing portion 53 , and a terminal portion 54 .

[0066] The column portion 51 extends in the axial direction.

[0067] The first fixing portion 52 protrudes radially from the column portion 51 toward the inner peripheral surface 31d of the yoke portion 31 and is provided at one end portion ( Figure 1 , the upper end of the column 51).

[0068] The first fixing portion 52 may be Figure 1 The column portion 51 shown protrudes, but it may not protrude more than the column portion 51.

[0069] The first fixing portion 52 may be integrated with the column portion 51. In this case, the first fixing portion 52 is integrally formed with the column portion 51, for example.

[0070] The first fixing portion 52 may not be integrated with the column portion 51. In this case, the first fixing portion 52 is fixed to the column portion 51 by, for example, bonding as a separate member from the column portion 51.

[0071] From the viewpoint of manufacturing efficiency of the terminal member 50A, it is preferable that the first fixing portion 52 and the column portion 51 are integrated.

[0072] The second fixing portion 53 protrudes radially from the column portion 51 toward the inner peripheral surface 31d of the yoke portion 31 and is provided at the other end portion ( Figure 1 , the lower end of the column 51).

[0073] The second fixing portion 53 may also be arranged in the circumferential direction as follows Figure 1 The illustrated portion protrudes more than the column portion 51 , but it may not protrude more than the column portion 51 .

[0074] The second fixing portion 53 may be integrated with the column portion 51. In this case, the second fixing portion 53 is integrally formed with the column portion 51, for example.

[0075] The second fixing portion 53 may not be integrated with the column portion 51. In this case, the second fixing portion 53 is fixed to the column portion 51 by, for example, bonding as a member separate from the column portion 51.

[0076] From the viewpoint of manufacturing efficiency of the terminal member 50A, it is preferable that the second fixing portion 53 is integrated with the column portion 51 .

[0077] It is preferred that the column portion 51 , the first fixing portion 52 , and the second fixing portion 53 are each independently made of an insulating material.

[0078] Examples of insulating materials constituting the column portion 51 , the first fixing portion 52 , and the second fixing portion 53 include resins such as nylon and polyphenylene sulfide (PPS).

[0079] The structural materials of the column portion 51 , the first fixing portion 52 , and the second fixing portion 53 may be the same as or different from each other, or may differ in part.

[0080] exist Figure 1 In the illustrated example, the terminal member 50A has one terminal portion 54 .

[0081] The terminal portion 54 is provided on the first fixing portion 52 so as to protrude from the first fixing portion 52 .

[0082] It is preferable that the terminal portion 54 protrudes from the first fixing portion 52 toward the side opposite to the second fixing portion 53 in the axial direction.

[0083] The terminal portion 54 may be integrated with the first fixing portion 52. In this case, the terminal portion 54 is integrally molded with the first fixing portion 52, for example.

[0084] The terminal portion 54 may not be integrated with the first fixing portion 52. In this case, the terminal portion 54 is fixed to the first fixing portion 52 by, for example, press-fitting as a separate member from the first fixing portion 52.

[0085] The terminal portion 54 is preferably made of a conductive material. In this case, one end portion 41 a of the winding 41 described later can be easily connected to a terminal of the wiring substrate via the terminal portion 54 .

[0086] As a conductive material constituting the terminal portion 54, metal such as phosphor bronze can be cited, for example.

[0087] The terminal portion 54 may be formed of an insulating material. In this case, it is not necessary to consider the insulation between the terminal portion 54 and the stator core 30A, so the degree of freedom in arranging the terminal portion 54 with respect to the first fixing portion 52 is improved.

[0088] Examples of the insulating material constituting the terminal portion 54 include resins such as nylon and polyphenylene sulfide.

[0089] Examples of the three-dimensional shape of the terminal portion 54 include a prism shape and a columnar shape.

[0090] The terminal member 50A sandwiches the yoke 31 in the axial direction, with the column portion 51 facing the outer peripheral surface 31 c of the yoke 31 , the first fixing portion 52 facing the first end surface 31 a of the yoke 31 , and the second fixing portion 53 facing the second end surface 31 b of the yoke 31 .

[0091] In the stator 20A, the terminal member 50A has a structure that clamps the yoke 31 in the axial direction. Therefore, even without additional processing such as forming a threaded hole on the yoke 31 as in Patent Document 1, the terminal member 50A can be easily installed on the yoke 31, thereby improving the working efficiency when installing the terminal member 50A.

[0092] Furthermore, in the stator 20A, the terminal member 50A is mounted so as to sandwich the yoke 31 in the axial direction, thereby improving the fixing strength of the terminal member 50A after mounting. In the stator 20A, the fixing strength of the terminal member 50A after mounting is improved, so the reliability is also improved.

[0093] An insulating member may be provided between the yoke 31 and the terminal member 50A. In this case, it is easy to ensure insulation between the yoke 31 and the terminal member 50A, especially insulation between the yoke 31 and the terminal portion 54.

[0094] The insulating member may be an insulating film that covers at least one of the yoke 31 and the terminal member 50A.

[0095] When the yoke 31 is covered with an insulating film, it is preferable that the surface of the yoke 31 facing the terminal member 50A is covered with the insulating film, and it is more preferable that the entire surface of the yoke 31 is covered with the insulating film.

[0096] In addition, when the surface of the yoke 31 facing the terminal member 50A is covered with the insulating film, the entire surface of the yoke 31 may not be covered with the insulating film.

[0097] When the terminal member 50A is covered with an insulating film, preferably, the surfaces of the column portion 51, the first fixing portion 52 and the second fixing portion 53 facing the yoke portion 31 are covered with the insulating film, and more preferably, the entire surfaces of the column portion 51, the first fixing portion 52 and the second fixing portion 53 are covered with the insulating film.

[0098] Alternatively, while the surfaces of the column 51 , the first fixing portion 52 , and the second fixing portion 53 facing the yoke 31 are covered with an insulating film, the entire surfaces of the column 51 , the first fixing portion 52 , and the second fixing portion 53 may not be covered with an insulating film.

[0099] As a method of coating the target surface of at least one of the yoke 31 and the terminal member 50A with an insulating film, for example, there is a method of applying an insulating material to the target surface by a coating method such as electrophoresis coating.

[0100] The insulating member may be an insulating sheet formed in advance from an insulating material. In this case, the insulating sheet is provided at least between the yoke 31 and the terminal member 50A.

[0101] In addition, when the column 51, the first fixing portion 52, and the second fixing portion 53 are made of insulating materials as described above, no insulating member may be provided between the yoke 31 and the terminal member 50A. However, for example, when the terminal 54 is exposed from the surface of the first fixing portion 52 facing the yoke 31, an insulating member is preferably provided between the yoke 31 and the exposed portion of the terminal 54.

[0102] One end portion 41a of the winding 41 is fixed in a state of being wound around the terminal portion 54. Thus, the one end portion 41a of the winding 41 is led out to the terminal member 50A.

[0103] Alternatively, one end 41a of the winding 41 may be fixed to the terminal portion 54 by welding or the like after being wound around the terminal portion 54. Alternatively, one end 41a of the winding 41 may be fixed to the terminal portion 54 and a terminal of a wiring substrate described later by welding or the like after being wound around the terminal portion 54.

[0104] In the stator 20A, it is sufficient as long as there is at least one coil 40A among the plurality of coils 40A in which the one end 41a of the winding 41 is fixed in a state of being wound around the terminal portion 54. In other words, among the plurality of coils 40A, the one end 41a of the winding 41 may be fixed in a state of being wound around the terminal portion 54 for all the coils 40A, or the one end 41a of the winding 41 may be fixed in a state of being wound around the terminal portion 54 for some of the coils 40A. It is also possible that, among the plurality of coils 40A, when the one end 41a of the winding 41 is fixed in a state of being wound around the terminal portion 54 for some of the coils 40A, the one end 41a of the winding 41 is not fixed in a state of being wound around the terminal portion 54 for the remaining coils 40A.

[0105] As described above, in the stator 20A, the coil 40A is electrically led out, for example, for electrical connection to a wiring substrate described later, by using the terminal members 50A that sandwich the yoke 31 in the axial direction.

[0106] As described above, according to the stator 20A, it is possible to improve the work efficiency during installation and the fixing strength after installation for the terminal member 50A for electrically extracting the coil 40A.

[0107] When the stator 20A is manufactured, there is no need to perform additional processing on the formed stator core 30A (more specifically, the yoke 31) in order to attach the terminal member 50A to the yoke 31. Therefore, when the stator 20A is manufactured, the stator core 30A is not damaged, and as a result, the strength of the stator 20A (more specifically, the stator core 30A) is suppressed from being reduced.

[0108] Furthermore, in the stator 20A, the terminal member 50A is mounted so as to sandwich the yoke 31 in the axial direction, so that the terminal member 50A does not reduce the occupancy rate of the coil 40A (winding 41 ), thereby ensuring the output density of the motor incorporating the stator 20A.

[0109] Hereinafter, as an example of the stator according to the first embodiment of the present invention, a stator in which a plurality of coil units are arranged in a ring shape in the circumferential direction will be described, and a method of fixing the terminal members of the respective coil units will be described.

[0110] like Figure 1 As shown, the stator 20A is formed by arranging a plurality of coil units including a coil unit 70A and a coil unit 71A in a ring shape in the circumferential direction.

[0111] In the stator 20A, the coil unit 70A is used, for example, when the windings 41 of a plurality of coils 40A are connected in series. Figure 1 As shown, the stator 20A may include a coil unit 71A without a terminal member 50A in addition to the coil unit 70A. In this case, since the terminal member 50A does not need to be provided in all coil units, the cost of the terminal member 50A can be reduced.

[0112] Figure 2 It means to observe from the inside. Figure 1 A three-dimensional schematic diagram of the state of the coil unit in. Figure 3 It means to observe from the outside Figure 1 A three-dimensional schematic diagram of the state of the coil unit in. Figure 4 Yes means Figure 2 and Figure 3 Schematic diagram of the split core. Figure 5 Yes means Figure 2 and Figure 3 A three-dimensional schematic diagram of the middle terminal component. Figure 6 Yes means Figure 5 A schematic cross-sectional view of a portion of the terminal member along line segment AA'.

[0113] Figure 2 and Figure 3 The coil unit 70A shown includes a split core 80A, a coil 40A, and a terminal member 50A.

[0114] The split core 80A is formed by splitting the stator core 30A in the circumferential direction. In other words, the stator core 30A is formed by arranging a plurality of split cores 80A in a ring shape in the circumferential direction.

[0115] The split core 80A includes a split yoke portion 81 and a teeth portion 32 .

[0116] The divided yoke portion 81 is formed by dividing the yoke portion 31 in the circumferential direction.

[0117] The split yoke 81 has a first end face 81a and a second end face 81b that are axially opposed. The first end face 81a of the split yoke 81 is included in the first end face 31a of the yoke 31. The second end face 81b of the split yoke 81 is included in the second end face 31b of the yoke 31.

[0118] The split yoke 81 has an outer peripheral surface 81c and an inner peripheral surface 81d which are opposed to each other in the radial direction. The outer peripheral surface 81c of the split yoke 81 is included in the outer peripheral surface 31c of the yoke 31. The inner peripheral surface 81d of the split yoke 81 is included in the inner peripheral surface 31d of the yoke 31.

[0119] The teeth portion 32 protrudes in the radial direction from the inner peripheral surface 81d of the split yoke portion 81. In this way, the teeth portion 32 and the split yoke portion 81 are integrated.

[0120] The split core 80A is formed of a molded body of magnetic powder. In other words, the split yoke 81 and the teeth 32 of the split core 80A are integrally formed of the molded body of magnetic powder.

[0121] When viewed from the axial direction, the outer periphery of the split core 80A along the circumferential direction, that is, the outer periphery of the split yoke 81 along the circumferential direction, for example, may be composed of only curves, only straight lines, or a combination of curves and straight lines. The arrangement of the split yoke 81 in the circumferential direction having the above-mentioned outer periphery when viewed from the axial direction includes the arrangement of the yoke 31 in the circumferential direction in a ring shape.

[0122] In the split core 80A, it is preferable that the teeth 32 are thinner on the split yoke 81 side than on the opposite side of the split yoke 81 in at least one direction of the axial direction and the circumferential direction. Figure 4 In the example shown, the teeth portion 32 is thinner in the circumferential direction on the split yoke portion 81 side than on the opposite side to the split yoke portion 81 .

[0123] Therefore, in the stator core 30A in which the plurality of split cores 80A are arranged in a ring shape in the circumferential direction, it is preferable that the teeth 32 are thinner in at least one of the axial direction and the circumferential direction on the yoke 31 side than on the opposite side to the yoke 31 .

[0124] If the yoke 31 side (the split yoke 81 side) of the tooth portion 32 is thinner than the opposite side of the yoke 31 (the opposite side to the split yoke 81), the number of turns of the coil 40A can be increased by using the thinner portion as the winding axis of the coil 40A. As a result, in the motor incorporating the stator 20A, the magnetic flux penetrating the coil 40A is easily increased, and therefore the output torque of the motor is easily improved.

[0125] The coil 40A is provided on the teeth portion 32 of the split core 80A.

[0126] In the terminal member 50A, the terminal portion 54 may penetrate the first fixing portion 52 in the axial direction, or may be Figure 6 As shown, the first fixing portion 52 is not penetrated in the axial direction.

[0127] The terminal member 50A sandwiches the split yoke 81 in the axial direction, and the column portion 51 faces the outer peripheral surface 81c of the split yoke 81, the first fixing portion 52 faces the first end surface 81a of the split yoke 81, and the second fixing portion 53 faces the second end surface 81b of the split yoke 81. Thus, the terminal member 50A is fixed to the split yoke 81.

[0128] Hereinafter, a specific method of fixing terminal member 50A of coil unit 70A will be described.

[0129] like Figure 2 , Figure 3 and Figure 4 As shown, a first groove 82 is provided on a first end surface 81 a of the split yoke portion 81 so as to be opened toward an outer peripheral surface 81 c of the split yoke portion 81 in the radial direction.

[0130] The first groove 82 only needs to be provided so as to open at least toward the outer peripheral surface 81 c of the split yoke portion 81 in the radial direction.

[0131] The first groove 82 may be provided to open radially across the outer circumferential surface 81c and the inner circumferential surface 81d of the split yoke 81. More specifically, the first groove 82 may be provided to connect the outer circumferential surface 81c and the inner circumferential surface 81d of the split yoke 81 in the radial direction.

[0132] Alternatively, the first groove 82 may not open toward the inner peripheral surface 81 d of the split yoke 81 in the radial direction, but may be provided halfway from the outer peripheral surface 81 c to the inner peripheral surface 81 d of the split yoke 81 .

[0133] The three-dimensional shape of the first groove 82 is not limited to Figure 4 The three-dimensional shape shown.

[0134] like Figure 2 and Figure 3As shown, the first end face 81a of the split yoke 81 is engaged with the first fixing portion 52. More specifically, the first groove 82 provided on the first end face 81a of the split yoke 81 is engaged with the first fixing portion 52. Thus, the first fixing portion 52 is firmly fixed to the split yoke 81, and the positioning of the first fixing portion 52 in the axial direction and the circumferential direction becomes easy.

[0135] like Figure 2 , Figure 3 and Figure 4 As shown, a second groove 83 is provided on the second end surface 81 b of the split yoke portion 81 , and the second groove 83 opens toward the outer peripheral surface 81 c of the split yoke portion 81 in the radial direction.

[0136] The second groove 83 only needs to be provided so as to open at least toward the outer peripheral surface 81 c of the split yoke portion 81 in the radial direction.

[0137] The second groove 83 may be provided to open radially across the outer circumferential surface 81c and the inner circumferential surface 81d of the split yoke 81. More specifically, the second groove 83 may be provided to connect the outer circumferential surface 81c and the inner circumferential surface 81d of the split yoke 81 in the radial direction.

[0138] Alternatively, the second groove 83 may not open toward the inner peripheral surface 81 d of the split yoke 81 in the radial direction, but may be provided halfway from the outer peripheral surface 81 c to the inner peripheral surface 81 d of the split yoke 81 .

[0139] The three-dimensional shape of the second groove 83 is not limited to Figure 4 The three-dimensional shape shown.

[0140] like Figure 2 and Figure 3 As shown in FIG. 1 , the second end surface 81b of the split yoke 81 is engaged with the second fixing portion 53. More specifically, the second groove 83 provided on the second end surface 81b of the split yoke 81 is engaged with the second fixing portion 53. Thus, the second fixing portion 53 is firmly fixed to the split yoke 81, and the positioning of the second fixing portion 53 in the axial direction and the circumferential direction becomes easy.

[0141] As described above, in the coil unit 70A, the first groove 82 is engaged with the first fixing portion 52, and the second groove 83 is engaged with the second fixing portion 53, whereby the terminal member 50A is firmly fixed to the split yoke 81 and the terminal member 50A is easily positioned in the axial and circumferential directions.

[0142] When the busbar is fixed to the stator core by threaded connection as in the electric motor described in Patent Document 1, after the stator core is manufactured, additional processing of forming threaded holes on the stator core is required, which reduces the manufacturing efficiency. Moreover, the stator core is damaged when the threaded holes are formed, which reduces the strength of the stator core. In addition, for example, when the stator core is composed of a powder core, the powder core is brittle, so the process of forming the threaded holes in the stator core itself is difficult.

[0143] In contrast, in the coil unit 70A, the first slot 82 provided at the first end face 81a of the split yoke 81 and the second slot 83 provided at the second end face 81b of the split yoke 81 are formed simultaneously with the forming of the split core 80A. In other words, when the coil unit 70A is manufactured, it is not necessary to perform additional processing on the formed split core 80A in order to provide the first slot 82 and the second slot 83 on the split yoke 81. Therefore, the reduction in the manufacturing efficiency of the coil unit 70A is suppressed.

[0144] Moreover, when the coil unit 70A is manufactured, there is no need to perform additional processing on the formed split iron core 80A in order to provide the first groove 82 and the second groove 83 on the split yoke 81. Therefore, the split iron core 80A will not be damaged, and as a result, the reduction in the strength of the coil unit 70A (more specifically, the split iron core 80A) is suppressed.

[0145] In the coil unit 70A, even if the first groove 82 and the second groove 83 provided on the split yoke 81 are shallower than the threaded hole described in, for example, Patent Document 1, they function when the first end face 81a of the split yoke 81 is engaged with the first fixing portion 52 and when the second end face 81b of the split yoke 81 is engaged with the second fixing portion 53. Therefore, in the coil unit 70A, even if the first groove 82 and the second groove 83 are provided on the split yoke 81, the influence on the magnetic characteristics is suppressed to a minimum.

[0146] like Figure 2 and Figure 3 As shown, the first fixing portion 52 may protrude axially from the first groove 82. In this case, in the coil unit 70A, it is easy to ensure the distance between the split yoke portion 81 and the terminal portion 54, and therefore, it is easy to ensure insulation between the split yoke portion 81 and the terminal portion 54.

[0147] Figure 7 It means in Figure 1 The schematic three-dimensional view shows a state where the stator is installed with a housing.

[0148] like Figure 7As shown, when the stator 20A is installed with a housing (also referred to as a motor housing) 100 for protecting the stator core 30A, the first fixing portion 52 is inserted from the first groove 82 (see Figure 2 , Figure 3 etc.) protrudes in the axial direction, it is easy to ensure the distance between the terminal portion 54 and the housing 100, and therefore it is easy to ensure the insulation between the terminal portion 54 and the housing 100.

[0149] like Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown in FIG. 1 , it is preferred that a guide groove 55 is provided in the first fixing portion 52. Figure 2 and Figure 3 In the illustrated example, the guide groove 55 is provided on the surface of the first fixing portion 52 on the inner peripheral surface 81 d side of the divided yoke portion 81 .

[0150] like Figure 2 and Figure 3 As shown, the winding 41 preferably passes through the guide groove 55 at one end 41a side and extends toward the terminal portion 54. In other words, the guide groove 55 is used as a groove for arranging the winding 41 when the one end 41a of the winding 41 is led out to the terminal portion 54.

[0151] The boundary between adjacent surfaces of the split yoke 81, for example, the boundary between the first end surface 81a and the inner peripheral surface 81d of the split yoke 81, is roughened during the manufacturing process of the split core 80A, and burrs are sometimes formed. Therefore, when the one end 41a of the winding 41 is led out to the terminal portion 54, if the one end 41a side of the winding 41 contacts the boundary between the first end surface 81a and the inner peripheral surface 81d of the split yoke 81, the insulating film of the winding 41 may be damaged due to the above-mentioned burrs.

[0152] In contrast, in the coil unit 70A, if the winding 41 passes through the guide groove 55 on one end 41a side and extends toward the terminal portion 54, when the one end 41a of the winding 41 is led out to the terminal portion 54, the one end 41a side of the winding 41 can avoid the boundary between the first end face 81a and the inner peripheral surface 81d of the split yoke 81, thereby preventing the insulating film of the winding 41 from being damaged.

[0153] Furthermore, in the coil unit 70A, if the winding 41 passes through the guide groove 55 on the one end portion 41a side and extends toward the terminal portion 54, Figure 7 In the state where the stator 20A is attached to the housing 100 as shown, the one end 41 a side of the winding 41 is unlikely to come into contact with the housing 100 , so that insulation between the winding 41 and the housing 100 is easily ensured.

[0154] like Figure 4 As shown, it is preferable that a third groove 84 extending in the axial direction is provided on the outer peripheral surface 81 c of the split yoke 81 .

[0155] like Figure 4 As shown, the third groove 84 is preferably provided to open across both sides of the first end face 81a side and the second end face 81b side of the split yoke 81 in the axial direction, and here, it is opened across both sides of the first groove 82 side and the second groove 83 side. More specifically, the third groove 84 is preferably provided to connect the first end face 81a and the second end face 81b of the split yoke 81 in the axial direction, and here, it is to connect the first groove 82 and the second groove 83.

[0156] The three-dimensional shape of the third groove 84 is not limited to Figure 4 The three-dimensional shape shown.

[0157] like Figure 2 and Figure 3 As shown, it is preferred that the outer peripheral surface 81c of the split yoke 81 is engaged with the column 51. More specifically, it is preferred that the third groove 84 provided on the outer peripheral surface 81c of the split yoke 81 is engaged with the column 51. Thus, the column 51 is firmly fixed to the split yoke 81, and the positioning of the column 51 in the circumferential direction and the radial direction becomes easy.

[0158] In the coil unit 70A, the first groove 82 is engaged with the first fixing portion 52, the second groove 83 is engaged with the second fixing portion 53, and the third groove 84 is engaged with the column portion 51, whereby the terminal member 50A is firmly fixed to the split yoke 81, and the positioning of the terminal member 50A in the axial, circumferential and radial directions becomes easy.

[0159] In the split core 80A of the coil unit 70A, when the third slot 84 is provided on the outer peripheral surface 81c of the split yoke 81, the third slot 84 is formed simultaneously with the forming of the split core 80A, similar to the first slot 82 and the second slot 83. In other words, when the coil unit 70A is manufactured, it is not necessary to perform additional processing on the formed split core 80A in order to provide the first slot 82, the second slot 83, and the third slot 84 on the split yoke 81. Therefore, the reduction in the manufacturing efficiency of the coil unit 70A is suppressed.

[0160] Moreover, when the coil unit 70A is manufactured, there is no need to perform additional processing on the formed split iron core 80A in order to provide the first groove 82, the second groove 83 and the third groove 84 on the split yoke 81. Therefore, the split iron core 80A will not be damaged, and as a result, the reduction in the strength of the coil unit 70A (more specifically, the split iron core 80A) is suppressed.

[0161] In the coil unit 70A, the third groove 84 provided in the split yoke 81 functions when the outer peripheral surface 81c of the split yoke 81 is fitted with the column 51 even if it is shallower than the threaded hole described in Patent Document 1, for example. Therefore, in the coil unit 70A, even if the third groove 84 is provided on the split yoke 81, the influence on the magnetic characteristics is suppressed to a minimum.

[0162] like Figure 3 As shown, in the coil unit 70A, preferably, in the radial direction, the terminal member 50A, which is the column portion 51, the first fixing portion 52, and the second fixing portion 53, does not protrude beyond the outer peripheral surface 81c of the split yoke portion 81. In this case, even in a state where the terminal member 50A is provided, the increase in the radial dimension of the coil unit 70A is suppressed.

[0163] In the coil unit 70A, a method is adopted in which the terminal member 50A does not protrude radially beyond the outer peripheral surface 81c of the split yoke 81, but it is also possible that the outer end of the terminal member 50A is located at the same position relative to the outer peripheral surface 81c of the split yoke 81 in the radial direction, or the outer end of the terminal member 50A is located on the inner peripheral surface 81d side of the split yoke 81.

[0164] like Figure 2 As shown, in the coil unit 70A, it is preferred that, in the radial direction, the terminal member 50A, here the first fixing portion 52 and the second fixing portion 53, do not protrude beyond the inner peripheral surface 81d of the split yoke 81. In this case, even in a state where the terminal member 50A is provided, the terminal member 50A is not likely to interfere with the coil 40A (winding 41), and therefore, the situation in which the occupancy rate of the coil 40A (winding 41) is reduced due to the terminal member 50A is suppressed.

[0165] In the coil unit 70A, the terminal member 50A does not protrude radially beyond the inner circumferential surface 81d of the split yoke 81. However, the inner end of the terminal member 50A may be located at the same position relative to the inner circumferential surface 81d of the split yoke 81 in the radial direction, or the inner end of the terminal member 50A may be located on the side of the outer circumferential surface 81c of the split yoke 81.

[0166] <Implementation method 2>

[0167] In the stator according to the second embodiment of the present invention, the first fixing portion is accommodated inside the first slot in the axial direction.

[0168] The stator according to the second embodiment of the present invention may be the same as the stator according to the first embodiment of the present invention except for the above-mentioned points.

[0169] Figure 8It is a perspective schematic diagram showing an example of a coil unit constituting a stator according to Embodiment 2 of the present invention. Fig. 9 Yes means Figure 8 A three-dimensional schematic diagram of the split iron core in FIG. Fig.10 Yes means Figure 8 A three-dimensional schematic diagram of the terminal component.

[0170] Figure 8 The coil unit 70B shown has a split core 80A (see Fig. 9 )、coil 40A、terminal member 50B (refer to Fig.10 ).

[0171] like Figure 8 As shown, the first fixing portion 52 is accommodated in the first groove 82 in the axial direction. In other words, the first fixing portion 52 does not protrude from the first groove 82 in the axial direction. As such, in the axial direction, the outer end of the first fixing portion 52 may be located at the same position relative to the outer end of the first groove 82, or may be located at the inner end (bottom) side of the first groove 82.

[0172] In the coil unit 70B, the first fixing portion 52 is axially received in the first slot 82, thereby suppressing the increase in the axial size of the coil unit 70B. Therefore, it is easy to make the stator formed by circumferentially arranging a plurality of coil units 70B in a ring shape low, and further make the motor assembled with the stator low.

[0173] In the coil unit 70B, the axial dimension of the first slot 82 is Fig. 9 Compared to Figure 4 There is no change, and the axial dimension of the first fixing portion 52 is Fig.10 China Figure 5 The first fixing portion 52 is smaller than the first groove 82 in the axial direction, but the present invention is not limited to this embodiment. For example, the size of the first fixing portion 52 in the axial direction may be smaller than the first groove 82 in the axial direction. Figure 5 There is no change, and the axial dimension of the first groove 82 is larger than Figure 4 The first fixing portion 52 is large enough to be accommodated in the first groove 82 in the axial direction.

[0174] In the first and second embodiments, the second fixing portion 53 may protrude from the second groove 83 in the axial direction, or may be accommodated in the second groove 83 in the axial direction. The same applies to the other embodiments.

[0175] <Implementation method 3>

[0176] In the stator of embodiment 3 of the present invention, a first groove is provided on the first end face of the yoke, the first groove is opened radially to the outer peripheral surface side of the yoke, and the first groove is engaged with the first fixing portion, and a second groove is provided on the second end face of the yoke, the second groove is opened radially to the outer peripheral surface side of the yoke, and the second groove is engaged with the second fixing portion, and the three-dimensional shapes of the first groove and the second groove are different from each other.

[0177] In the stator according to the third embodiment of the present invention, the maximum dimensions of the first slot and the second slot in the circumferential direction are different from each other.

[0178] In the stator according to the third embodiment of the present invention, the maximum dimension of the first slot in the circumferential direction is larger than the maximum dimension of the second slot in the circumferential direction.

[0179] The stator according to the third embodiment of the present invention may be the same as the stators according to the first and second embodiments of the present invention except for the above-mentioned points.

[0180] Fig.11 It is a perspective schematic diagram showing an example of a coil unit constituting a stator according to a third embodiment of the present invention. Fig.12 Yes means Fig.11 A three-dimensional schematic diagram of the split iron core in FIG. Fig.13 Yes means Fig.11 A three-dimensional schematic diagram of the terminal component.

[0181] Fig.11 The coil unit 70C shown has a split core 80C (see Fig.12 )、coil 40A、terminal member 50C (refer to Fig.13 ).

[0182] like Fig.11 and Fig.12 As shown in FIG. 1 , the three-dimensional shapes of the first groove 82 and the second groove 83 are different from each other. This makes it easy to distinguish the first groove 82 from the second groove 83.

[0183] In this specification, the three-dimensional shapes of two elements are different from each other, which means, of course, that the types of the three-dimensional shapes of the elements (for example, prism, cylinder, etc.) are different. It also means that the types of the three-dimensional shapes of the elements are the same but the various dimensions (for example, axial dimension, circumferential dimension, radial dimension, etc.) are different.

[0184] like Fig.11 and Fig.12 As shown in FIG. 1 , the maximum dimensions of the first groove 82 and the second groove 83 in the circumferential direction are different from each other. More specifically, as shown in FIG. Fig.11 and Fig.12 As shown, the maximum dimension of the first groove 82 in the circumferential direction is larger than the maximum dimension of the second groove 83 in the circumferential direction.

[0185] In the coil unit 70C, the maximum dimension of the first slot 82 in the circumferential direction is larger than the maximum dimension of the second slot 83 in the circumferential direction. Thus, when one end 41a of the winding 41 is led out to the terminal portion 54, the side of one end 41a of the winding 41 can easily avoid the boundary between the first end face 81a and the inner circumferential surface 81d of the split yoke portion 81, thereby easily preventing the insulating film of the winding 41 from being damaged.

[0186] Moreover, in the coil unit 70C, the maximum dimension of the first slot 82 in the circumferential direction is larger than the maximum dimension of the second slot 83 in the circumferential direction, thereby making it easy to ensure the distance between the first end face 81a of the split yoke 81 and the terminal portion 54, and therefore making it easy to ensure the insulation between the split yoke 81 (split iron core 80C) and the terminal portion 54.

[0187] In the coil unit 70C, the maximum dimension of the first slot 82 in the circumferential direction is larger than the maximum dimension of the second slot 83 in the circumferential direction. Thus, a housing is mounted on the stator in which the plurality of coil units 70C are arranged in a ring shape in the circumferential direction (see Figure 7 ) state, the area where the first groove 82 is provided at the first end face 81a of the split yoke 81 is separated from the shell becomes a larger area, thereby easily ensuring the insulation between the split yoke 81 (split iron core 80C) and the shell.

[0188] <Implementation method 4>

[0189] In the stator according to the fourth embodiment of the present invention, the maximum dimension of the first slot in the circumferential direction is smaller than the maximum dimension of the second slot in the circumferential direction.

[0190] The stator according to the fourth embodiment of the present invention may be the same as the stators according to the first to third embodiments of the present invention except for the above-mentioned point.

[0191] Fig.14 It is a perspective schematic diagram showing an example of a coil unit constituting a stator according to a fourth embodiment of the present invention. Fig.15 Yes means Fig.14 A three-dimensional schematic diagram of the split iron core in FIG. Fig.16 Yes means Fig.14 A three-dimensional schematic diagram of the terminal component.

[0192] Fig.14 The coil unit 70D shown has a split core 80D (see Fig.15 )、coil 40A、terminal member 50D (refer to Fig.16 ).

[0193] like Fig.14 and Fig.15As shown, the maximum dimension of the first groove 82 in the circumferential direction is smaller than the maximum dimension of the second groove 83 in the circumferential direction.

[0194] <Implementation method 5>

[0195] In the stator of embodiment 5 of the present invention, a first step portion along the axial direction is provided at the bottom of the first slot, so that the axial dimension of the first slot is smaller on the outer circumferential surface side of the yoke than on the inner circumferential surface side, and the first fixing portion has a first protrusion protruding in the axial direction, and the first step portion is engaged with the first protrusion.

[0196] In the stator of embodiment 5 of the present invention, a third step portion is provided along the axial direction at the bottom of the second slot, so that the axial dimension of the second slot is smaller on the outer peripheral surface side of the yoke than on the inner peripheral surface side, and the second fixing portion has a third protrusion protruding in the axial direction, and the third step portion is engaged with the third protrusion.

[0197] The stator according to the fifth embodiment of the present invention may be the same as the stators according to the first to fourth embodiments of the present invention except for the above-mentioned points.

[0198] Fig.17 It is a perspective schematic diagram showing an example of a coil unit constituting a stator according to Embodiment 5 of the present invention. Fig.18 Yes means Fig.17 A three-dimensional schematic diagram of the split iron core in FIG. Fig.19 Yes means Fig.17 A three-dimensional schematic diagram of the terminal component.

[0199] Fig.17 The coil unit 70E shown has a split core 80E (see Fig.18 )、coil 40A、terminal member 50E (refer to Fig.19 ).

[0200] like Fig.17 and Fig.18 As shown, at the bottom of the first groove 82 (here, the bottom on the axial side of the second groove 83), a first step portion 82a is provided along the axial direction, so that the axial dimension of the first groove 82 is smaller on the outer peripheral surface 81c side of the split yoke 81 than on the inner peripheral surface 81d side.

[0201] like Fig.17 and Fig.19 As shown in FIG. 1 , the first fixing portion 52 has a first protruding portion 52a protruding in the axial direction. Fig.17 and Fig.19 In the illustrated example, the first protrusion 52 a protrudes in a claw shape from the radially innermost side (here, the side opposite to the columnar portion 51 ) of the first fixing portion 52 in the axial direction toward the second fixing portion 53 .

[0202] like Fig.17 As shown in FIG. 8 , the first step portion 82 a is fitted into the first protrusion 52 a . Thus, the first fixing portion 52 is firmly fixed to the split yoke 81 , and the first fixing portion 52 is easily positioned in the axial direction, the circumferential direction, and the radial direction.

[0203] like Fig.17 and Fig.18 As shown, at the bottom of the second groove 83 (here, the bottom on the axial side of the first groove 82), a third step portion 83a is provided along the axial direction, so that the axial dimension of the second groove 83 is smaller on the outer peripheral surface 81c side of the split yoke 81 than on the inner peripheral surface 81d side.

[0204] like Fig.17 and Fig.19 As shown in FIG. 1 , the second fixing portion 53 has a third protruding portion 53a protruding in the axial direction. Fig.17 and Fig.19 In the illustrated example, the third protrusion 53 a protrudes in a claw shape from the radially innermost side (here, the side opposite to the columnar portion 51 ) of the second fixing portion 53 in the axial direction toward the first fixing portion 52 .

[0205] like Fig.17 As shown in FIG. 8 , the third step portion 83 a is fitted into the third protrusion 53 a . Thus, the second fixing portion 53 is firmly fixed to the split yoke 81 , and positioning of the second fixing portion 53 in the axial direction, circumferential direction, and radial direction is facilitated.

[0206] As described above, in the coil unit 70E, the first step portion 82a is engaged with the first protrusion 52a, and the third step portion 83a is engaged with the third protrusion 53a, whereby the terminal member 50E is firmly fixed to the split yoke 81, and the positioning of the terminal member 50E in the axial, circumferential and radial directions becomes easy.

[0207] In the coil unit 70E, the first step portion 82a can be engaged with the first protrusion 52a, and the third step portion 83a can be engaged with the third protrusion 53a, simply by pressing the terminal member 50E relative to the split yoke 81 from the outer peripheral surface 81c side of the split yoke 81. Therefore, the working efficiency when installing the terminal member 50E is improved.

[0208] The number of steps of the first step portion 82a and the third step portion 83a are independent of each other, and may be one step or a plurality of steps.

[0209] The number of steps of the first step portion 82a and the third step portion 83a may be the same as or different from each other.

[0210] The three-dimensional shapes of the first protrusion 52a and the third protrusion 53a are not limited to Fig.17 and Fig.19 The three-dimensional shape shown.

[0211] When the first step portion 82a has a plurality of steps, the surface of the first protrusion 52a may have a plurality of steps along the surface of the first step portion 82a in terms of the three-dimensional shape of the first protrusion 52a.

[0212] When the third step portion 83a has a plurality of steps, the surface of the third protrusion 53a may have a plurality of steps along the surface of the third step portion 83a in terms of the three-dimensional shape of the third protrusion 53a.

[0213] The three-dimensional shapes of the first protrusion 52a and the third protrusion 53a may be the same as or different from each other.

[0214] In addition, as a modification of the coil unit 70E, one of the fitting portion where the first step portion 82a fits with the first protrusion 52a and the fitting portion where the third step portion 83a fits with the third protrusion 53a is not provided. For example, in the case where the first step portion 82a is provided at the first groove 82 and the first fixing portion 52 has the first protrusion 52a, the third step portion 83a is not provided at the second groove 83 and the second fixing portion 53 does not have the third protrusion 53a. Alternatively, in the case where the third step portion 83a is provided at the second groove 83 and the second fixing portion 53 has the third protrusion 53a, the first step portion 82a is not provided at the first groove 82 and the first fixing portion 52 does not have the first protrusion 52a.

[0215] <Implementation method 6>

[0216] In the stator of embodiment 6 of the present invention, a second step portion along the circumferential direction is provided on the side of the first slot, so that the circumferential dimension of the first slot is smaller on the outer circumferential surface side of the yoke than on the inner circumferential surface side, and the first fixing portion has a second protrusion protruding in the circumferential direction, and the second step portion is engaged with the second protrusion.

[0217] In the stator of embodiment 6 of the present invention, a 4th step portion along the circumferential direction is provided on the side of the 2nd slot, so that the circumferential dimension of the 2nd slot is smaller on the outer circumferential surface side of the yoke than on the inner circumferential surface side, and the second fixing portion has a 4th protrusion protruding in the circumferential direction, and the 4th step portion is engaged with the 4th protrusion.

[0218] The stator according to the sixth embodiment of the present invention may be the same as the stators according to the first to fifth embodiments of the present invention (including modified examples) except for the above-mentioned points.

[0219] Fig. 20It is a perspective schematic diagram showing an example of a coil unit constituting a stator according to Embodiment 6 of the present invention. Fig.21 Yes means Fig. 20 A three-dimensional schematic diagram of the split iron core in FIG. Fig. 22 Yes means Fig. 20 A three-dimensional schematic diagram of the terminal component.

[0220] Fig. 20 The coil unit 70F shown has a split core 80F (see Fig.21 )、coil 40A、terminal member 50F (refer to Fig. 22 ).

[0221] like Fig. 20 and Fig.21 As shown, second step portions 82ba and 82bb are provided along the circumferential direction on the side of the first groove 82 so that the circumferential dimension of the first groove 82 is smaller on the outer peripheral surface 81c side of the split yoke 81 than on the inner peripheral surface 81d side.

[0222] like Fig. 20 and Fig. 22 As shown in FIG. 1 , the first fixing portion 52 includes a second protruding portion 52ba and a second protruding portion 52bb that protrude in the circumferential direction. Fig. 20 and Fig. 22 In the illustrated example, the second protrusions 52 ba and 52 bb protrude toward opposite sides from the radially innermost side (here, the side opposite to the columnar portion 51 ) of the first fixing portion 52 in the circumferential direction.

[0223] like Fig. 20 As shown, the second step portion 82ba is fitted with the second protrusion 52ba, and the second step portion 82bb is fitted with the second protrusion 52bb. Thus, the first fixing portion 52 is firmly fixed to the split yoke 81, and the first fixing portion 52 is easily positioned in the axial, circumferential and radial directions.

[0224] like Fig. 20 and Fig.21 As shown, the side of the second groove 83 is provided with a fourth step portion 83ba and a fourth step portion 83bb along the circumferential direction, so that the circumferential dimension of the second groove 83 is smaller on the outer peripheral surface 81c side of the split yoke 81 than on the inner peripheral surface 81d side.

[0225] like Fig. 20 and Fig. 22 As shown in FIG. 1 , the second fixing portion 53 has a fourth protrusion 53ba and a fourth protrusion 53bb protruding in the circumferential direction. Fig. 20 and Fig. 22In the example shown, the second fixing portion 53 has a snap-fit ​​structure, and the fourth protrusions 53ba and 53bb protrude toward opposite sides in the circumferential direction from the radially innermost side of the second fixing portion 53 (here, the side opposite to the column portion 51).

[0226] like Fig. 20 As shown, the fourth step portion 83ba is fitted with the fourth protrusion 53ba, and the fourth step portion 83bb is fitted with the fourth protrusion 53bb. Thus, the second fixing portion 53 is firmly fixed to the split yoke 81, and the positioning of the second fixing portion 53 in the axial direction, circumferential direction and radial direction becomes easy.

[0227] As described above, in the coil unit 70F, the second step portion 82ba is engaged with the second protrusion 52ba, the second step portion 82bb is engaged with the second protrusion 52bb, the fourth step portion 83ba is engaged with the fourth protrusion 53ba, and the fourth step portion 83bb is engaged with the fourth protrusion 53bb, thereby firmly fixing the terminal member 50F to the split yoke 81 and facilitating the positioning of the terminal member 50F in the axial, circumferential and radial directions.

[0228] In the coil unit 70F, the working efficiency when the terminal member 50F is installed is improved. In particular, in the coil unit 70F, the second fixing portion 53 has a snap-fit ​​structure, so that the fourth step portion 83ba can be engaged with the fourth protrusion 53ba, and the fourth step portion 83bb can be engaged with the fourth protrusion 53bb by simply pressing the second fixing portion 53 relative to the split yoke 81 from the outer peripheral surface 81c side of the split yoke 81.

[0229] In the coil unit 70F, the terminal member 50F is mounted on the split yoke 81 by the above-mentioned fitting method. Therefore, even if the terminal member 50F is connected to the split yoke 81 with the coil unit 70A (see Figure 2 and Figure 3 ), the axial dimensions of the first slot 82 and the second slot 83 are smaller than those of the first slot 82 and the second slot 83, and the terminal member 50F is also firmly fixed to the split yoke 81. Thus, in the coil unit 70F, the axial dimensions of the first slot 82 and the second slot 83 can be made smaller, so that even when the terminal member 50F is provided, the terminal member 50F is not likely to interfere with the coil 40A (winding 41), thereby suppressing the situation in which the occupancy rate of the coil 40A (winding 41) is reduced due to the terminal member 50F.

[0230] The second step portion 82ba, the second step portion 82bb, the fourth step portion 83ba, and the fourth step portion 83bb may have independent numbers of steps, and may be one step or multiple steps.

[0231] The number of steps of the second step portion 82ba, the second step portion 82bb, the fourth step portion 83ba, and the fourth step portion 83bb may be the same as or different from each other, or may be partially different.

[0232] The three-dimensional shapes of the second protrusion 52ba, the second protrusion 52bb, the fourth protrusion 53ba, and the fourth protrusion 53bb are not limited to Fig. 20 and Fig. 22 The three-dimensional shape shown.

[0233] When the second step portion 82ba has a plurality of steps, the surface of the second protrusion 52ba may have a plurality of steps along the surface of the second step portion 82ba in terms of the three-dimensional shape of the second protrusion 52ba.

[0234] When the second step portion 82bb has a plurality of steps, the surface of the second protrusion 52bb may have a plurality of steps along the surface of the second step portion 82bb in terms of the three-dimensional shape of the second protrusion 52bb.

[0235] When the fourth step portion 83ba has a plurality of steps, the surface of the fourth protrusion 53ba may have a plurality of steps along the surface of the fourth step portion 83ba in terms of the three-dimensional shape of the fourth protrusion 53ba.

[0236] When the fourth step portion 83bb has a plurality of steps, the surface of the fourth protrusion 53bb may have a plurality of steps along the surface of the fourth step portion 83bb with respect to the three-dimensional shape of the fourth protrusion 53bb.

[0237] The three-dimensional shapes of the second protrusion 52ba, the second protrusion 52bb, the fourth protrusion 53ba, and the fourth protrusion 53bb may be the same as or different from each other, or may differ in part.

[0238] In addition, as a modification of the coil unit 70F, it is also possible that no more than three fitting locations are provided among the fitting locations where the second step portion 82ba fits with the second protrusion 52ba, the fitting locations where the second step portion 82bb fits with the second protrusion 52bb, the fitting locations where the fourth step portion 83ba fits with the fourth protrusion 53ba, and the fitting locations where the fourth step portion 83bb fits with the fourth protrusion 53bb. For example, it is also possible that when the second step portion 82ba and the second step portion 82bb are provided in the first groove 82 and the first fixing portion 52 has the second protrusion 52ba and the second protrusion 52bb, the fourth step portion 83ba and the fourth step portion 83bb are not provided in the second groove 83, and the second fixing portion 53 does not have the fourth protrusion 53ba and the fourth protrusion 53bb.

[0239] <Implementation method 7>

[0240] In the stator of embodiment 7 of the present invention, the first slot is a tapered shape whose circumferential dimension decreases as it goes from the inner circumferential surface side of the yoke to the outer circumferential surface side, the first fixing portion has a first tapered portion having a tapered shape whose circumferential dimension decreases as it goes from the inner circumferential surface side of the yoke to the outer circumferential surface side, and the first slot is engaged with the first tapered portion.

[0241] In the stator of embodiment 7 of the present invention, the second slot is a tapered shape whose circumferential dimension decreases as it goes from the inner circumferential surface side of the yoke to the outer circumferential surface side, the second fixed portion has a second tapered portion having a tapered shape whose circumferential dimension decreases as it goes from the inner circumferential surface side of the yoke to the outer circumferential surface side, and the second slot is engaged with the second tapered portion.

[0242] The stator according to the seventh embodiment of the present invention may be the same as the stators according to the first to fifth embodiments of the present invention (including modified examples) except for the above-mentioned points.

[0243] Fig.23 It is a perspective schematic diagram showing an example of a coil unit constituting a stator according to a seventh embodiment of the present invention. Fig.24 Yes means Fig.23 A three-dimensional schematic diagram of the split iron core in FIG. Fig.25 Yes means Fig.23 A three-dimensional schematic diagram of the terminal component.

[0244] Fig.23 The coil unit 70G shown has a split core 80G (see Fig.24 )、coil 40A、terminal member 50G (refer to Fig.25 ).

[0245] like Fig.23 and Fig.24As shown, the first groove 82 has a tapered shape in which the circumferential dimension becomes smaller from the inner peripheral surface 81 d side to the outer peripheral surface 81 c side of the split yoke 81 .

[0246] like Fig.23 and Fig.25 As shown in FIG. 1 , the first fixing portion 52 has a first tapered portion 52c having a tapered shape whose circumferential dimension decreases as it moves from the inner peripheral surface 81d side of the split yoke portion 81 toward the outer peripheral surface 81c side. Fig.23 and Fig.25 In the illustrated example, the first fixing portion 52 has a first tapered portion 52 c at a position on the second fixing portion 53 side in the axial direction.

[0247] like Fig.23 As shown, the first groove 82 is fitted into the first tapered portion 52c. Thus, the first fixing portion 52 is firmly fixed to the split yoke 81, and the first fixing portion 52 is easily positioned in the axial direction, the circumferential direction, and the radial direction.

[0248] like Fig.23 and Fig.24 As shown, the second groove 83 has a tapered shape in which the dimension in the circumferential direction decreases as it goes from the inner peripheral surface 81 d side of the split yoke 81 toward the outer peripheral surface 81 c side.

[0249] like Fig.23 and Fig.25 As shown in FIG. 1 , the second fixing portion 53 has a second tapered portion 53c having a tapered shape whose circumferential dimension decreases as it moves from the inner peripheral surface 81d side of the split yoke portion 81 toward the outer peripheral surface 81c side. Fig.23 and Fig.25 In the illustrated example, the second fixing portion 53 is constituted by a second tapered portion 53 c.

[0250] like Fig.23 As shown in FIG. 8 , the second groove 83 is fitted into the second tapered portion 53 c . Thus, the second fixing portion 53 is firmly fixed to the split yoke 81 , and positioning of the second fixing portion 53 in the axial direction, circumferential direction, and radial direction is facilitated.

[0251] As described above, in the coil unit 70G, the first groove 82 is engaged with the first tapered portion 52c and the second groove 83 is engaged with the second tapered portion 53c, whereby the terminal member 50G is firmly fixed to the split yoke 81 and the positioning of the terminal member 50G in the axial, circumferential and radial directions becomes easy.

[0252] In the coil unit 70G, the working efficiency when the terminal member 50G is installed is improved. It is also possible that, from the perspective of the working efficiency when the terminal member 50G is installed, a slit is provided, for example, at the second tapered portion 53c. If a slit is provided at the second tapered portion 53c, the second tapered portion 53c (second fixing portion 53) is easily flexed, and therefore, the second groove 83 can be easily engaged with the second tapered portion 53c. The slit can also be provided, for example, in the circumferential direction or in the radial direction.

[0253] In the coil unit 70G, the terminal member 50G is attached to the split yoke 81 by the above-mentioned fitting method. Therefore, even if the terminal member 50G is connected to the split yoke 81 with the coil unit 70A (see Figure 2 and Figure 3 ), the axial dimensions of the first slot 82 and the second slot 83 are smaller than those of the first slot 82 and the second slot 83, and the terminal member 50G is also firmly fixed to the split yoke 81. Thus, in the coil unit 70G, the axial dimensions of the first slot 82 and the second slot 83 can be made smaller, so that even in a state where the terminal member 50G is provided, the terminal member 50G is not likely to interfere with the coil 40A (winding 41), thereby suppressing a situation in which the occupancy rate of the coil 40A (winding 41) is reduced due to the terminal member 50G.

[0254] Furthermore, in the split core 80G of the coil unit 70G, the split core 80F (see Fig.21 ) compared to the first groove 82 and the second groove 83, the forming becomes easier.

[0255] The axial dimensions of the first groove 82 and the first tapered portion 52c may be the same or different from each other. When the axial dimensions of the first groove 82 and the first tapered portion 52c are different from each other, the axial dimension of the first groove 82 may be larger than the axial dimension of the first tapered portion 52c or smaller than the axial dimension of the first tapered portion 52c.

[0256] The axial dimensions of the second groove 83 and the second tapered portion 53c may be the same or different from each other. When the axial dimensions of the second groove 83 and the second tapered portion 53c are different from each other, the axial dimension of the second groove 83 may be larger than the axial dimension of the second tapered portion 53c or smaller than the axial dimension of the second tapered portion 53c.

[0257] The three-dimensional shapes of the first groove 82 and the second groove 83 are not limited to the above-mentioned tapered shapes. Fig.23 and Fig.24 The three-dimensional shape shown.

[0258] The three-dimensional shapes of the first groove 82 and the second groove 83 may be the same or different from each other.

[0259] The three-dimensional shapes of the first tapered portion 52c and the second tapered portion 53c are not limited to the above-mentioned tapered shapes. Fig.23 and Fig.25 The three-dimensional shape shown.

[0260] The three-dimensional shapes of the first tapered portion 52c and the second tapered portion 53c may be the same as or different from each other.

[0261] In addition, as a modification of the coil unit 70G, one of the fitting portion where the first groove 82 fits with the first tapered portion 52c and the fitting portion where the second groove 83 fits with the second tapered portion 53c may not be provided. For example, in the case where the first groove 82 is tapered and the first fixed portion 52 has the first tapered portion 52c, the second groove 83 is not tapered and the second fixed portion 53 does not have the second tapered portion 53c. Alternatively, in the case where the second groove 83 is tapered and the second fixed portion 53 has the second tapered portion 53c, the first groove 82 is not tapered and the first fixed portion 52 does not have the first tapered portion 52c.

[0262] <Implementation method 8>

[0263] In the stator of embodiment 8 of the present invention, a first recessed portion recessed in the axial direction is provided on one of the bottom of the first slot and the first fixing portion, and a first protrusion protruding in the axial direction is provided on the other of the bottom of the first slot and the first fixing portion, and the first recessed portion and the first protrusion are engaged with each other.

[0264] In the stator of embodiment 8 of the present invention, a second recessed portion recessed in the axial direction is provided on one of the bottom of the second slot and the second fixing portion, and a second protrusion protruding in the axial direction is provided on the other of the bottom of the second slot and the second fixing portion, and the second recess and the second protrusion are engaged with each other.

[0265] The stator according to the eighth embodiment of the present invention may be the same as the stators according to the first to seventh embodiments of the present invention (including modified examples) except for the above-mentioned points.

[0266] Fig.26 It is a perspective schematic diagram showing an example of a coil unit constituting a stator according to an eighth embodiment of the present invention. Fig. 27 Yes means Fig.26 A three-dimensional schematic diagram of the split iron core in FIG. Fig.28 Yes means Fig.26 A three-dimensional schematic diagram of the terminal component.

[0267] Fig.26 The coil unit 70H shown has a split core 80H (see Fig. 27 )、coil 40A、terminal member 50H (refer to Fig.28 ).

[0268] like Fig.26 and Fig. 27 As shown in FIG. 1 , a first recessed portion 91a is provided at the bottom of the first groove 82 (here, the bottom on the second groove 83 side in the axial direction). Fig.26 and Fig. 27 In the illustrated example, the first recessed portion 91 a is recessed in the axial direction from a position spaced apart from the peripheral edge in the bottom of the first groove 82 toward the second groove 83 .

[0269] like Fig.26 and Fig.28 As shown in FIG. 1 , a first protrusion 92a protruding in the axial direction is provided on the first fixing portion 52. Fig.26 and Fig.28 In the illustrated example, the first projection 92a projects toward the second fixing portion 53 from a position spaced apart from the periphery on the bottom surface of the first fixing portion 52 (here, the surface on the second fixing portion 53 side) in the axial direction.

[0270] like Fig.26 As shown in FIG. 1 , the first recessed portion 91 a is fitted into the first protruding portion 92 a . Thus, the first fixing portion 52 is firmly fixed to the split yoke 81 , and positioning of the first fixing portion 52 in the axial direction, the circumferential direction, and the radial direction is facilitated.

[0271] like Fig.26 and Fig. 27 As shown in FIG. 1 , a second recessed portion 91 b is provided at the bottom of the second groove 83 (here, at the bottom on the first groove 82 side in the axial direction). Fig.26 and Fig. 27 In the illustrated example, the second recessed portion 91 b is recessed toward the first groove 82 from a position in the bottom of the second groove 83 that is spaced apart from the peripheral edge in the axial direction.

[0272] like Fig.26 and Fig.28 As shown in FIG. 1 , a second protrusion 92 b protruding in the axial direction is provided at the second fixing portion 53. Fig.26 and Fig.28 In the example shown, the second projection 92 b projects toward the first fixing portion 52 from a position spaced apart from the periphery on the top surface of the second fixing portion 53 (here, the surface on the first fixing portion 52 side) in the axial direction.

[0273] like Fig.26 As shown in FIG. 1 , the second recessed portion 91 b is fitted into the second protruding portion 92 b . Thus, the second fixing portion 53 is firmly fixed to the split yoke 81 , and positioning of the second fixing portion 53 in the axial direction, the circumferential direction, and the radial direction is facilitated.

[0274] As described above, in the coil unit 70H, the first recess 91a is engaged with the first protrusion 92a, and the second recess 91b is engaged with the second protrusion 92b, whereby the terminal member 50H is firmly fixed to the split yoke 81 and the positioning of the terminal member 50H in the axial, circumferential and radial directions becomes easy.

[0275] In the coil unit 70H, the first recess 91a can be engaged with the first protrusion 92a and the second recess 91b can be engaged with the second protrusion 92b simply by pressing the terminal member 50H relative to the split yoke 81 from the outer peripheral surface 81c side of the split yoke 81, thereby improving the working efficiency when installing the terminal member 50H.

[0276] In the coil unit 70H, the terminal member 50H is mounted on the split yoke 81 by the above-mentioned fitting method. Therefore, for example, even if the terminal member 50H is mounted on the split yoke 81 together with the coil unit 70A (see Figure 2 and Figure 3 ), the axial dimensions of the first slot 82 and the second slot 83 are smaller than those of the first slot 82 and the second slot 83, and the terminal member 50H is also firmly fixed to the split yoke 81. Thus, in the coil unit 70H, the axial dimensions of the first slot 82 and the second slot 83 can be made smaller, so that even when the terminal member 50H is provided, the terminal member 50H is not likely to interfere with the coil 40A (winding 41), thereby suppressing the situation in which the occupancy rate of the coil 40A (winding 41) is reduced due to the terminal member 50H.

[0277] The three-dimensional shapes of the first recess 91a and the second recess 91b are not limited to Fig.26 and Fig. 27 The three-dimensional shape shown.

[0278] The three-dimensional shapes of the first recessed portion 91 a and the second recessed portion 91 b may be the same as or different from each other.

[0279] The three-dimensional shapes of the first convex portion 92a and the second convex portion 92b are not limited to Fig.26 and Fig.28 The three-dimensional shape shown.

[0280] The three-dimensional shapes of the first convex portion 92a and the second convex portion 92b may be the same as or different from each other.

[0281] With respect to the combination of the first groove 82 and the first fixing portion 52, the first recessed portion 91a and the first convex portion 92a may be provided with one or more fitting portions. In other words, the first recessed portion 91a and the first convex portion 92a may be provided with one or more fitting portions, respectively.

[0282] When a plurality of fitting locations where the first recessed portion 91 a and the first protruding portion 92 a fit together are provided, the positional relationship of the plurality of fitting locations is not particularly limited, and for example, the fitting locations may be provided to be spaced apart in the circumferential direction or may be spaced apart in the radial direction.

[0283] With respect to the combination of the second groove 83 and the second fixing portion 53, the second recessed portion 91b and the second convex portion 92b may be provided with one or more fitting portions. In other words, the second recessed portion 91b and the second convex portion 92b may be provided with one or more fitting portions, respectively.

[0284] When a plurality of fitting locations where the second recessed portion 91 b and the second protruding portion 92 b fit together are provided, the positional relationship of the plurality of fitting locations is not particularly limited, and for example, the fitting locations may be provided to be separated in the circumferential direction or separated in the radial direction.

[0285] In addition, as a modification of the coil unit 70H, the first recessed portion 91 a may be provided at the first fixing portion 52 instead of at the bottom of the first groove 82 , and the first protruding portion 92 a may be provided at the bottom of the first groove 82 instead of at the first fixing portion 52 .

[0286] In addition, as a modification of the coil unit 70H, the second recessed portion 91 b may be provided at the second fixing portion 53 instead of at the bottom of the second groove 83 , and the second protruding portion 92 b may be provided at the bottom of the second groove 83 instead of at the second fixing portion 53 .

[0287] Furthermore, as a modification of the coil unit 70H, one of the fitting portion where the first recess 91a fits with the first protrusion 92a and the fitting portion where the second recess 91b fits with the second protrusion 92b is not provided. For example, in the case where the first recess 91a is provided at the bottom of the first groove 82 and the first protrusion 92a is provided at the first fixing portion 52, the second recess 91b is not provided at the bottom of the second groove 83, and the second protrusion 92b is not provided at the second fixing portion 53. Alternatively, in the case where the second recess 91b is provided at the bottom of the second groove 83 and the second protrusion 92b is provided at the second fixing portion 53, the first recess 91a is not provided at the bottom of the first groove 82, and the first protrusion 92a is not provided at the first fixing portion 52.

[0288] <Implementation method 9>

[0289] In the stator according to the ninth embodiment of the present invention, the terminal member has two terminal portions.

[0290] In the stator according to the ninth embodiment of the present invention, one end of the winding is fixed while being wound around one of the two terminal portions, and the other end of the winding is fixed while being wound around the other of the two terminal portions.

[0291] The stator according to the ninth embodiment of the present invention may be the same as the stators according to the first to eighth embodiments of the present invention (including modified examples) except for the above-mentioned points.

[0292] Fig.29 It is a perspective schematic diagram showing an example of a stator according to Embodiment 9 of the present invention.

[0293] Fig.29 The stator 20J shown includes a stator core 30J, a plurality of coils 40A, and a plurality of terminal members 50J.

[0294] The stator 20J is formed by arranging a plurality of coil units 70J in a ring shape in the circumferential direction.

[0295] In the stator 20J, the windings 41 of the plurality of coils 40A are connected in parallel, for example.

[0296] In the stator 20J, the plurality of coils 40A, for example, in the case of three phases, include a coil composed of a U-phase winding, a coil composed of a V-phase winding, and a coil composed of a W-phase winding. In this case, the U-phase winding, the V-phase winding, and the W-phase winding are connected by star connection or delta connection.

[0297] The plurality of terminal members 50J each include a column portion 51 , a first fixing portion 52 , a second fixing portion 53 , a terminal portion 54 a , and a terminal portion 54 b .

[0298] The terminal portion 54 a and the terminal portion 54 b are provided on the first fixing portion 52 , and protrude from the first fixing portion 52 at positions spaced apart from each other in the circumferential direction.

[0299] The structural materials of the terminal portion 54 a and the terminal portion 54 b may be the same as or different from each other.

[0300] The three-dimensional shapes of the terminal portion 54 a and the terminal portion 54 b may be the same as or different from each other.

[0301] One end portion 41a of the winding 41 is fixed in a state of being wound around the terminal portion 54a. Thus, one end portion 41a of the winding 41 is led out to the terminal member 50J.

[0302] The other end 41b of the winding 41 is fixed in a state of being wound around the terminal portion 54b. Thus, the other end 41b of the winding 41 is led out to the terminal member 50J.

[0303] In the stator 20J, it is sufficient as long as there is at least one coil 40A among the plurality of coils 40A in which one end 41a of the winding 41 is fixed while being wound around the terminal portion 54a, and the other end 41b of the winding 41 is fixed while being wound around the terminal portion 54b. In other words, among the plurality of coils 40A, one end 41a of the winding 41 may be fixed while being wound around the terminal portion 54a, and the other end 41b of the winding 41 may be fixed while being wound around the terminal portion 54b for all the coils 40A, or one end 41a of the winding 41 may be fixed while being wound around the terminal portion 54a, and the other end 41b of the winding 41 may be fixed while being wound around the terminal portion 54b for some of the coils 40A. It is also possible that, among the multiple coils 40A, while one end 41a of the winding 41 is fixed in a state of being wound around the terminal portion 54a and the other end 41b of the winding 41 is fixed in a state of being wound around the terminal portion 54b for a part of the coils 40A, at least one of the one end 41a and the other end 41b of the winding 41 is not fixed in a state of being wound around the terminal portion for the remaining coils 40A.

[0304] In the above embodiment, a mode in which the stator core is a split type structure divided into split cores is shown, but in the stator of the present invention, the stator core may be an integrated structure that is not divided.

[0305] According to the stator with a split stator core structure, the coils can be densely arranged compared to the stator with a single-piece stator core structure, and as a result, the number of coils can be increased. Therefore, according to the stator with a split stator core structure, it is easy to improve the characteristics of the motor compared to the stator with a single-piece stator core structure.

[0306] In the above embodiment, the first end face of the yoke is engaged with the first fixing portion and the second end face of the yoke is engaged with the second fixing portion. However, in the stator of the present invention, the engagement between the first end face of the yoke and the first fixing portion and the engagement between the second end face of the yoke and the second fixing portion may be the same or different. In the stator of the present invention, when the engagement between the first end face of the yoke and the first fixing portion and the engagement between the second end face of the yoke and the second fixing portion are different, for example, the engagement of the first conical groove provided at the first end face of the yoke with the first conical portion of the first fixing portion (refer to embodiment 7) and the engagement of the third step portion at the bottom of the second groove provided at the second end face of the yoke with the third protrusion of the second fixing portion (refer to embodiment 5) may be combined.

[0307] In the above embodiment, the first groove provided at the first end face of the yoke is engaged with the first fixing portion of the terminal member, and the second groove provided at the second end face of the yoke is engaged with the second fixing portion of the terminal member. However, in the stator of the present invention, at least one of the first groove and the second groove may not be provided in the yoke. In the stator of the present invention, when both the first groove and the second groove are not provided in the yoke, the terminal member may clamp the yoke only in the axial direction.

[0308] The stator of the present invention may be used not only as a structural member of a motor described below but also as a structural member of a generator, for example.

[0309] [motor]

[0310] A motor according to the present invention is characterized by comprising: the stator according to the present invention; and a rotor disposed facing an inner peripheral surface of the stator.

[0311] Fig.30 It is a perspective schematic diagram showing an example of the motor of the present invention.

[0312] Fig.30 The motor 1A shown has a rotor 10A and a stator 20A.

[0313] In the motor 1A, the rotor 10A is located on the inner side of the coaxial axis and the stator 20A is located on the outer side of the coaxial axis with respect to the axis AX which corresponds to the rotation axis of the rotor 10A.

[0314] The rotor 10A and the stator 20A are disposed so that their inner peripheral surfaces face each other.

[0315] The rotor 10A includes, for example, a rotor yoke 11 , a shaft body 12 , and a permanent magnet 13 .

[0316] The rotor yoke 11 is made of, for example, a bulk soft magnetic body, an electromagnetic steel plate, a powder magnetic core, a resin molded body containing a soft magnetic material, or the like.

[0317] The shaft body 12 is inserted into the rotor yoke 11 .

[0318] Examples of the structural material of the shaft body 12 include metals such as stainless steel.

[0319] The direction in which the shaft body 12 extends, that is, the direction in which the axis AX extends, is parallel to the axial direction.

[0320] The permanent magnets 13 are provided so that N poles and S poles are alternately arranged along the outer peripheral surface of the rotor yoke 11 .

[0321] The rotor 10A may have a substantially circular shape or a substantially polygonal shape when viewed from the axial direction.

[0322] In the present embodiment, a motor including the stator 20A including a plurality of coil units 70A arranged in a ring shape in the circumferential direction is shown, but the same is true for a motor including a stator including other coil units such as the coil unit 70B arranged in a ring shape in the circumferential direction.

[0323] The motor of the present invention may further include a connection substrate electrically connected to one end portion of the winding.

[0324] In the wiring substrate, a plurality of through holes penetrating between the one main surface and the other main surface may be provided so as to be spaced apart from each other in the circumferential direction.

[0325] In the wiring substrate, the terminal may be exposed on the inner wall surface of each through hole.

[0326] Alternatively, the wiring substrate may be placed in the axial direction relative to the stator so that the terminal portions of the plurality of terminal members of the stator (see Figure 1 ) pass through each through hole.

[0327] If the above-mentioned wiring substrate is placed in the axial direction relative to the stator, one end of the winding wound on the terminal portion of the terminal member can be efficiently connected to the terminal exposed from the inner wall surface of the through hole of the wiring substrate. Therefore, according to the motor having the above-mentioned wiring substrate, the electrical connection between the one end of the winding and the terminal of the wiring substrate can be easily achieved.

[0328] Alternatively, the motor of the present invention may further include a housing for protecting a stator core of the stator (see Figure 7 ).

[0329] When the motor includes a wiring substrate and a housing, the wiring substrate may be provided inside the housing or outside the housing.

[0330] This specification discloses the following contents.

[0331] <1> A stator, characterized in that it comprises: a stator core, which has an annular yoke along the circumferential direction and a tooth portion protruding from the inner peripheral surface of the yoke in the radial direction of the yoke, and is composed of a molded body of magnetic powder; a coil, which is composed of a winding wound around the tooth portion; and a terminal member, which has a column portion extending in the axial direction of the stator core, a first fixing portion provided at one end of the column portion in the axial direction and protruding toward the inner peripheral surface of the yoke in the radial direction more than the column portion, and a first fixing portion protruding toward the inner peripheral surface of the yoke in the radial direction more than the column portion. A second fixing portion is arranged at the other end of the above-mentioned column portion in the above-mentioned axial direction, and a terminal portion is arranged at the above-mentioned first fixing portion so as to protrude from the above-mentioned first fixing portion, the above-mentioned yoke portion has a first end face and a second end face which are opposite to each other in the above-mentioned axial direction, the above-mentioned terminal member clamps the above-mentioned yoke portion in the above-mentioned axial direction, and makes the above-mentioned column portion and the outer peripheral surface of the above-mentioned yoke portion in the above-mentioned radial direction face each other, the above-mentioned first fixing portion faces the above-mentioned first end face of the above-mentioned yoke portion, and the above-mentioned second fixing portion faces the above-mentioned second end face of the above-mentioned yoke portion, and one end portion of the above-mentioned winding is fixed in a state of being wound around the above-mentioned terminal portion.

[0332] <2> In the stator described in <1>, the first end surface of the yoke portion is fitted into the first fixing portion.

[0333] <3> In the stator described in <2>, a first groove is provided on the first end surface of the yoke, the first groove opens toward the outer peripheral surface of the yoke in the radial direction, and the first groove is engaged with the first fixing portion.

[0334] <4> In the stator described in <3>, the first fixing portion protrudes from the first groove in the axial direction.

[0335] <5> In the stator described in <3>, the first fixing portion is accommodated inside the first slot in the axial direction.

[0336] <6> In the stator described in any one of <3> to <5>, a first step portion along the axial direction is provided at the bottom of the above-mentioned first slot, so that the dimension of the above-mentioned first slot in the axial direction is smaller on the above-mentioned outer peripheral surface side of the above-mentioned yoke than on the above-mentioned inner peripheral surface side, and the above-mentioned first fixing portion has a first protrusion protruding in the above-mentioned axial direction, and the above-mentioned first step portion is engaged with the above-mentioned first protrusion.

[0337] <7> In the stator described in any one of <3> to <6>, a second step portion along the circumferential direction is provided on the side of the above-mentioned first slot, so that the size of the above-mentioned first slot in the circumferential direction is smaller on the above-mentioned outer circumferential surface side of the above-mentioned yoke than on the above-mentioned inner circumferential surface side, and the above-mentioned first fixing portion has a second protrusion protruding in the above-mentioned circumferential direction, and the above-mentioned second step portion is engaged with the above-mentioned second protrusion.

[0338] <8> In the stator described in any one of <3> to <6>, the above-mentioned first slot is a tapered shape whose size in the circumferential direction becomes smaller as it goes from the above-mentioned inner circumferential surface side of the above-mentioned yoke to the above-mentioned outer circumferential surface side, the above-mentioned first fixing portion has a first tapered portion having a tapered shape whose size in the circumferential direction becomes smaller as it goes from the above-mentioned inner circumferential surface side of the above-mentioned yoke to the above-mentioned outer circumferential surface side, and the above-mentioned first slot is engaged with the above-mentioned first tapered portion.

[0339] <9> In the stator described in any one of <3> to <8>, a first recessed portion recessed in the axial direction is provided at one of the bottom of the first slot and the first fixing portion, and a first convex portion protruding in the axial direction is provided at the other of the bottom of the first slot and the first fixing portion, and the first recessed portion is engaged with the first convex portion.

[0340] <10> In the stator according to any one of <1> to <9>, the second end surface of the yoke portion is fitted into the second fixing portion.

[0341] <11> In the stator described in <10>, a second groove is provided on the second end surface of the yoke, the second groove opens toward the outer peripheral surface of the yoke in the radial direction, and the second groove is engaged with the second fixing portion.

[0342] <12> In the stator described in <11>, a third step portion along the axial direction is provided at the bottom of the second slot, so that the dimension of the second slot in the axial direction is smaller on the outer circumferential surface side of the yoke than on the inner circumferential surface side, and the second fixing portion has a third protrusion protruding in the axial direction, and the third step portion is engaged with the third protrusion.

[0343] <13> In the stator described in <11> or <12>, a fourth step portion along the circumferential direction is provided on the side of the second slot, so that the size of the second slot in the circumferential direction is smaller on the outer circumferential surface side of the yoke than on the inner circumferential surface side, and the second fixing portion has a fourth protrusion protruding in the circumferential direction, and the fourth step portion is engaged with the fourth protrusion.

[0344] <14> In the stator described in <11> or <12>, the second slot is in a tapered shape whose dimension in the circumferential direction becomes smaller as it goes from the inner circumferential surface side of the yoke toward the outer circumferential surface side, the second fixing portion has a second tapered portion in a tapered shape whose dimension in the circumferential direction becomes smaller as it goes from the inner circumferential surface side of the yoke toward the outer circumferential surface side, and the second slot is engaged with the second tapered portion.

[0345] <15> In the stator described in any one of <11> to <14>, a second recessed portion recessed in the axial direction is provided at one of the bottom of the second slot and the second fixing portion, and a second protrusion protruding in the axial direction is provided at the other of the bottom of the second slot and the second fixing portion, and the second recessed portion is engaged with the second protrusion.

[0346] <16> In the stator described in <1>, a first groove is provided on the first end face of the yoke, the first groove is opened to the outer peripheral surface side of the yoke in the radial direction, and the first groove is engaged with the first fixing portion, and a second groove is provided on the second end face of the yoke, the second groove is opened to the outer peripheral surface side of the yoke in the radial direction, and the second groove is engaged with the second fixing portion, and the three-dimensional shapes of the first groove and the second groove are different from each other.

[0347] <17> In the stator described in <16>, the maximum dimensions of the first slot and the second slot in the circumferential direction are different from each other.

[0348] <18> In the stator described in <17>, a maximum dimension of the first slot in the circumferential direction is larger than a maximum dimension of the second slot in the circumferential direction.

[0349] <19> In the stator according to any one of <1> to <18>, a guide groove is provided in the first fixing portion, and the winding extends toward the terminal portion and passes through the guide groove at one end side.

[0350] <20> In the stator according to any one of <1> to <19>, a third groove extending in the axial direction is provided on the outer peripheral surface of the yoke portion, and the third groove is fitted into the column portion.

[0351] <21> In the stator described in any one of <1> to <20>, a plurality of coil units are arranged in a ring shape in the circumferential direction, and each of the plurality of coil units independently has: a split core formed by dividing the stator core in the circumferential direction, the coil, and the terminal member.

[0352] <22> In the stator described in any one of <1> to <21>, the stator core is formed of a powder magnetic core.

[0353] <23> A motor comprising: the stator according to any one of <1> to <22>; and a rotor disposed facing an inner peripheral surface of the stator.

[0354] Description of Reference Numerals

[0355] 1A...motor; 10A...rotor; 11...rotor yoke; 12...shaft; 13...permanent magnet; 20A, 20J...stator; 30A, 30J...stator core; 31...yoke; 31a...first end face of yoke; 31b...second end face of yoke; 31c...outer circumference of yoke; 31d...inner circumference of yoke; 32...tooth; 40A...coil; 41...winding; 41a...winding one end; 41b...the other end of the winding; 50A, 50B, 50C, 50D, 50E, 50F, 50G, 50H, 50J...terminal member; 51...column; 52...first fixing portion; 52a...first protrusion; 52ba, 52bb...second protrusion; 52c...first tapered portion; 53...second fixing portion; 53a...third protrusion; 53ba, 53bb...fourth protrusion; 53c ...second tapered portion; 54, 54a, 54b...terminal portion; 55...guide groove; 70A, 70B, 70C, 70D, 70E, 70F, 70G, 70H, 70J, 71A...coil unit; 80A, 80C, 80D, 80E, 80F, 80G, 80H...split core; 81...split yoke; 81a...first end face of the split yoke; 81b...second end face of the split yoke; 81c...split yoke The outer circumference of the part; 81d...the inner circumference of the divided yoke; 82...the first groove; 82a...the first step portion; 82ba, 82bb...the second step portion; 83...the second groove; 83a...the third step portion; 83ba, 83bb...the fourth step portion; 84...the third groove; 91a...the first recess; 91b...the second recess; 92a...the first protrusion; 92b...the second protrusion; 100...the housing; AX...the axis.

Claims

1. A stator, characterized in that: have: A stator core having an annular yoke portion along the circumferential direction and teeth protruding from the inner circumferential surface of the yoke portion in the radial direction of the yoke portion, and composed of a molded body of magnetic powder; a coil composed of a winding wound around the teeth; as well as The terminal member comprises a column portion extending in the axial direction of the stator core, a first fixing portion provided at one end portion of the column portion in the axial direction so as to protrude in the radial direction toward the inner peripheral surface of the yoke portion from the column portion, a second fixing portion provided at the other end portion of the column portion in the axial direction so as to protrude in the radial direction toward the inner peripheral surface of the yoke portion from the column portion, and a terminal portion provided at the first fixing portion so as to protrude from the first fixing portion. The yoke has a first end face and a second end face which are opposite to each other in the axial direction. The terminal member sandwiches the yoke in the axial direction, and makes the column portion and the outer peripheral surface of the yoke in the radial direction face each other, the first fixing portion faces the first end surface of the yoke, and the second fixing portion faces the second end surface of the yoke, One end of the winding is fixed while being wound around the terminal portion.

2. The stator according to claim 1, characterized in that: The first end surface of the yoke is fitted with the first fixing portion.

3. The stator according to claim 2, characterized in that: A first groove is provided on the first end surface of the yoke, and the first groove opens toward the outer peripheral surface side of the yoke in the radial direction. The first groove is engaged with the first fixing portion.

4. The stator according to claim 3, characterized in that: The first fixing portion protrudes from the first groove in the axial direction.

5. The stator according to claim 3, characterized in that: In the axial direction, the first fixing portion is accommodated inside the first groove.

6. The stator according to any one of claims 3 to 5, characterized in that: A first step portion is provided along the axial direction at the bottom of the first groove so that the dimension of the first groove in the axial direction is smaller on the outer peripheral surface side of the yoke than on the inner peripheral surface side. The first fixing portion has a first protruding portion protruding in the axial direction, The first step portion is engaged with the first protrusion.

7. The stator according to any one of claims 3 to 6, characterized in that: A second step portion along the circumferential direction is provided on a side portion of the first groove so that a dimension of the first groove in the circumferential direction is smaller on the outer circumferential surface side of the yoke than on the inner circumferential surface side. The first fixing portion has a second protrusion protruding in the circumferential direction, The second step portion is engaged with the second protrusion.

8. The stator according to any one of claims 3 to 6, characterized in that: The first groove is in a tapered shape such that the dimension in the circumferential direction decreases as it moves from the inner circumferential surface side of the yoke toward the outer circumferential surface side. The first fixing portion includes a first tapered portion having a tapered shape in which a dimension in the circumferential direction decreases as it goes from the inner circumferential surface side of the yoke portion toward the outer circumferential surface side. The first groove is fitted into the first tapered portion.

9. The stator according to any one of claims 3 to 8, characterized in that: A first recessed portion recessed in the axial direction is provided at one of the bottom of the first groove and the first fixing portion. A first protrusion protruding in the axial direction is provided on the other of the bottom of the first groove and the first fixing portion. The first recessed portion is fitted with the first convex portion.

10. The stator according to any one of claims 1 to 9, characterized in that: The second end surface of the yoke is fitted with the second fixing portion.

11. The stator according to claim 10, characterized in that: A second groove is provided on the second end surface of the yoke, and the second groove opens toward the outer peripheral surface side of the yoke in the radial direction. The second groove is engaged with the second fixing portion.

12. The stator according to claim 11, characterized in that A third step portion is provided along the axial direction at the bottom of the second groove so that the dimension of the second groove in the axial direction is smaller on the outer peripheral surface side of the yoke than on the inner peripheral surface side. The second fixing portion has a third protruding portion protruding in the axial direction, The third step portion is engaged with the third protrusion.

13. The stator according to claim 11 or 12, characterized in that: A fourth step portion is provided along the circumferential direction on the side of the second groove so that the size of the second groove in the circumferential direction is smaller on the outer circumferential surface side of the yoke than on the inner circumferential surface side. The second fixing portion has a fourth protrusion protruding in the circumferential direction, The fourth step portion is engaged with the fourth protrusion.

14. The stator according to claim 11 or 12, characterized in that: The second groove is in a tapered shape such that the dimension in the circumferential direction decreases as it moves from the inner circumferential surface side of the yoke toward the outer circumferential surface side. The second fixing portion includes a second tapered portion having a tapered shape in which a dimension in the circumferential direction decreases as it moves from the inner circumferential surface side of the yoke toward the outer circumferential surface side. The second groove is fitted into the second tapered portion.

15. The stator according to any one of claims 11 to 14, characterized in that: A second recessed portion recessed in the axial direction is provided at one of the bottom of the second groove and the second fixing portion. A second protrusion protruding in the axial direction is provided on the other of the bottom of the second groove and the second fixing portion. The second concave portion is fitted with the second convex portion.

16. The stator according to claim 1, characterized in that A first groove is provided on the first end surface of the yoke, and the first groove opens toward the outer peripheral surface side of the yoke in the radial direction. The first groove is engaged with the first fixing portion. A second groove is provided on the second end surface of the yoke, and the second groove opens toward the outer peripheral surface side of the yoke in the radial direction. The second groove is engaged with the second fixing portion. The three-dimensional shapes of the first groove and the second groove are different from each other.

17. The stator according to claim 16, characterized in that The maximum dimensions of the first groove and the second groove in the circumferential direction are different from each other.

18. The stator according to claim 17, characterized in that A maximum dimension of the first groove in the circumferential direction is larger than a maximum dimension of the second groove in the circumferential direction.

19. The stator according to any one of claims 1 to 18, characterized in that: The first fixing portion is provided with a guide groove, The winding extends toward the terminal portion and passes through the guide groove at one end side.

20. The stator according to any one of claims 1 to 19, characterized in that: A third groove extending in the axial direction is provided on the outer peripheral surface of the yoke. The third groove is fitted into the column portion.

21. The stator according to any one of claims 1 to 20, characterized in that: The plurality of coil units are arranged in a ring shape in the circumferential direction. Each of the plurality of coil units independently includes a split core obtained by splitting the stator core in the circumferential direction, the coil, and the terminal member.

22. The stator according to any one of claims 1 to 21, characterized in that: The stator core is composed of a pressed powder magnetic core.

23. A motor, characterized in that: have: The stator according to any one of claims 1 to 22; and The rotor is arranged to face the inner circumference of the stator.

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