motor

Abstract

The motor (1) comprises: a stator including a plurality of coil units (7); and a rotor (3) configured to rotate freely about a rotation axis. Each of the plurality of coil units (7) has a coil (20) and a stator core (40). The stator core (40) has a plurality of protrusions (54, 64). The coil (20) has two leads extending from a winding portion (22). At least one of a first lead (23) and a second lead (24) is configured to pass between the stator core (40) of the two coil units (7), wherein the first lead (23) is one of the two leads, and the second lead (24) is the other of the two leads. Magnetic poles are disposed on one of the inner circumference (PA) and the outer circumference of the stator core (40), and the first lead (23) and the second lead (24) are disposed on the other.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a motor. BACKGROUND

[0002] The motor described in Patent Document 1 has a stator and a rotor. The stator has a plurality of coil units. The plurality of coil units are stacked in the rotational axis direction. Lead wires of the coils are configured to pass between magnetic poles at an outer peripheral surface of the stator where the magnetic poles are arranged.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT DOCUMENT

[0005] Patent Document 1: Japanese Patent Application Publication No. 2013-158072 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] However, if the lead wires of the coils are arranged in the air gap between the rotor and the stator, the rotor can come into contact with the lead wires. When the rotor comes into contact with the lead wires, the lead wires can deteriorate. Therefore, an object of the present application is to provide a motor that can suppress contact between the rotor and the lead wires.

[0008] MEANS FOR SOLVING THE PROBLEMS

[0009] The motor that solves the problem has a stator including a plurality of coil units stacked in the axial direction with a non-magnetic body interposed therebetween, and a rotor configured to be rotatable about a rotational axis, wherein the plurality of coil units each have a coil having a winding portion wound in a ring shape about the rotational axis, and a stator core provided to surround at least a portion of the winding portion of the coil, the stator core having a plurality of protruding portions alternately arranged in the circumferential direction at both ends in the axial direction of the stator core and protruding in the radial direction toward the rotor from both ends in the axial direction of the stator core, the coil having the winding portion and two lead wires extending from the winding portion, at least one of a first lead wire and a second lead wire being arranged to pass between stator cores of two of the coil units, wherein the first lead wire is one of the two lead wires, the second lead wire is the other of the two lead wires, a magnetic pole is arranged in one of an inner peripheral portion and an outer peripheral portion of the stator core, and the first lead wire and the second lead wire are arranged in the other of the inner peripheral portion and the outer peripheral portion of the stator core.

[0010] According to this structure, since the first lead wire and the second lead wire are not arranged in the air gap between the rotor and the stator, it is possible to suppress contact between the first lead wire and the second lead wire and the rotor.

[0011] In the above motor, a spacer including the non-magnetic body is arranged between the coil units, the spacer has a lead wire guide that guides the lead wire, and at least one of the first lead wire and the second lead wire is arranged to pass through the lead wire guide of the spacer. According to this structure, the positional deviation of the lead wire between the coil units can be suppressed.

[0012] In the above motor, the spacer has at least one of a first engaging portion that engages with the first lead wire and a second engaging portion that engages with the second lead wire. According to this structure, the movement of at least one of the first lead wire and the second lead wire accompanying the vibration of the motor can be suppressed.

[0013] In the above motor, the spacer has at least one of a first curved guide that smoothly curves the first lead wire and a second curved guide that smoothly curves the second lead wire. According to this structure, since at least one of the first lead wire and the second lead wire is smoothly curved, the bending of at least one of the first lead wire and the second lead wire can be suppressed.

[0014] In the above motor, the stator core has a first ring portion that is formed in a ring shape on one side in the axial direction, a first protruding portion that protrudes in a radial direction from the first ring portion, and a first claw magnetic pole that is provided to the first protruding portion and extends in the axial direction, and the stator core also has a second ring portion that is formed in a ring shape on the other side in the axial direction, a second protruding portion that protrudes in a radial direction from the second ring portion, and a second claw magnetic pole that is provided to the second protruding portion and extends in the axial direction, the first claw magnetic pole and the second claw magnetic pole are arranged alternately in a circumferential direction, respectively, and at least one of the first lead wire and the second lead wire is arranged to pass between the stator cores of two of the coil units from a first range surrounded by two of the first protruding portions and the first ring portion that are adjacent to each other or from a second range surrounded by two of the second protruding portions and the second ring portion that are adjacent to each other in the stator core. According to this structure, at least one of the first lead wire and the second lead wire can be routed simply.

[0015] In the above motor, at least one of the first lead wire and the second lead wire is arranged to pass between the stator cores of two of the coil units from between the second claw magnetic pole and the coil in the range of the first range or from between the first claw magnetic pole and the coil in the range of the second range. According to this structure, at least one of the first lead wire and the second lead wire is sandwiched by the first claw magnetic pole and the coil or by the second claw magnetic pole and the coil. Thus, at least one of the first lead wire and the second lead wire can be suppressed from coming out to the air gap between the rotor and the stator.

[0016] In the above motor, the stator core has a first core having the first ring portion, the first protruding portion, and the first claw magnetic pole, and a second core having the second ring portion, the second protruding portion, and the second claw magnetic pole, and at least one of the first lead wire and the second lead wire is configured to pass through an inter-core gap between the first core and the second core provided at a joint portion of the first core and the second core.

[0017] In a case where a hole is provided in the first core or the second core, work of passing the second lead wire through the hole takes time and effort. In this regard, according to the above structure, in the manufacture of the motor, at least one of the first lead wire and the second lead wire can be configured when the first core and the second core are joined, and thus, the production efficiency of the motor can be improved.

[0018] In the above motor, the plurality of coil units are joined by a holding member having a rod portion that passes through the plurality of coil units, a rod portion guide is provided at an outer periphery of the rod portion, and the first lead wire and the second lead wire are configured along the rod portion guide. According to this structure, the first lead wire and the second lead wire can be inhibited from moving in conjunction with vibration of the motor.

[0019] In the above motor, a portion of at least one of the first lead wire and the second lead wire that contacts the stator core is surrounded by an insulating member 98. According to this structure, the face distance between the lead wire and the stator core can be ensured, and the insulation performance can be improved.

[0020] In the above motor, a coil holder having a cylindrical portion centered on a rotation axis is further provided, a winding portion of the coil is configured from a wire wound around the cylindrical portion of the coil holder, and the stator core holds the coil holder. According to this structure, the coil can be positioned with respect to the stator core by simple assembly. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a cross-sectional view of a motor.

[0022] Figure 2 is a cross-sectional view of a stator.

[0023] Figure 3 is a plan view of a coil holder.

[0024] Figure 4 is a cross-sectional view of a coil holder with a wire wound therearound.

[0025] Figure 5 is a perspective view of a first core.

[0026] Figure 6is a perspective view of the coil unit.

[0027] Figure 7 is a plan view of the coil unit.

[0028] Figure 8 is a plan view of the spacer.

[0029] Figure 9 is a sectional view of the coil unit and the spacer.

[0030] Figure 10 is a sectional view of the member in which the first member and the rod portion are combined.

[0031] Figure 11 is a plan view of the member in which the first member and the rod portion are combined.

[0032] Figure 12 is a schematic view showing a manufacturing method of the motor.

[0033] Figure 13 is a plan view of the coil holder regarding the first modification example.

[0034] Figure 14 is a sectional view of the coil holder in which the wire is wound.

[0035] Figure 15 is a plan view of the coil holder regarding the second modification example.

[0036] Figure 16 is a plan view of the coil unit regarding the third modification example.

[0037] Figure 17 is a sectional view of the coil unit.

[0038] Figure 18 is a plan view of the coil holder regarding the fourth modification example.

[0039] Figure 19 is a sectional view of the coil unit.

[0040] Figure 20 is a plan view of the spacer regarding the fifth modification example.

[0041] Figure 21 is a sectional view of the coil unit and the spacer.

[0042] Figure 22 is a plan view of the spacer regarding the sixth modification example.

[0043] Figure 23 is a sectional view of the coil unit and the spacer.

[0044] Figure 24 is a plan view of the spacer regarding the seventh modification example.

[0045] Figure 25 is a sectional view of the coil unit and the spacer.

[0046] Figure 26 is a perspective view of the coil unit regarding the eighth modification example.

[0047] Figure 27 is a sectional view of the coil former wound with the wire regarding the ninth modification example.

[0048] Figure 28 is a sectional view of the coil unit.

[0049] Figure 29 is a view from Figure 28 arrow A.

[0050] Figure 30 is a sectional view of the coil former wound with the wire regarding the tenth modification example.

[0051] Figure 31 is a sectional view of the coil unit.

[0052] Figure 32 is a view from Figure 31 arrow B.

[0053] Figure 33 is a view of the tube.

[0054] Figure 34 is a plan view of the coil former regarding the eleventh modification example.

[0055] Figure 35 is a sectional view of the coil former wound with the wire.

[0056] Figure 36 is a plan view of the coil unit.

[0057] Figure 37 is a plan view of the coil former regarding the twelfth modification example.

[0058] Figure 38 is a plan view of the coil unit.

[0059] Figure 39 is a plan view of the member in which the first member and the rod portion are combined regarding the thirteenth modification example.

[0060] Figure 40 is a plan view of the member in which the first member and the rod portion are combined regarding the fourteenth modification example.

[0061] Figure 41 is a perspective view of the member in which the first member and the rod portion are combined.

[0062] Figure 42is a cross-sectional view of the coil unit and the spacer of the fifteenth modification example.

[0063] Figure 43 is a view as seen from Figure 42 arrow C.

[0064] Figure 44 is a view as seen from Figure 42 arrow D. DETAILED DESCRIPTION

[0065] Hereinafter, the motor of the present embodiment will be described. Further, the present disclosure is not limited to the example described below, but is shown by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0066] The motor 1 can be an outer rotor type motor, or an inner rotor type motor. In the present embodiment, the motor 1 of the outer rotor type will be described.

[0067] The motor 1 is provided to various electric appliances and a moving body such as a two-wheeled vehicle. For example, the motor 1 is used as a driving device of a fan of a blower.

[0068] As shown in Figure 1 , the motor 1 is a multiphase motor. The motor 1 of the present embodiment is a 3-phase motor. The motor 1 has coil units 7 of U phase, V phase, and W phase. The coil units 7 of U phase, V phase, and W phase are sequentially stacked in the direction along the rotational axis center C (hereinafter, referred to as "rotational axis center direction DC"). The motor 1 of the present embodiment is an outer rotor type motor, and has a claw pole type stator.

[0069] The motor 1 has a stator 2 and a rotor 3. The rotor 3 is configured to be rotatable around the rotational axis center. The rotor 3 rotates around the rotational axis center C. The rotor 3 is configured to be able to arrange the stator 2 in a space inside the rotor 3. The rotor 3 has rotor units 4 corresponding to each phase. The plurality of rotor units 4 are stacked in the rotational axis center direction DC. The rotor unit 4 has a cylindrical rotational iron core 5 having an inner peripheral surface 5a centered on the rotational axis center C, and a magnet 6 arranged at a predetermined interval in the circumferential direction on the inner peripheral surface 5a of the rotational iron core 5. The magnet 6 is composed of a permanent magnet.

[0070] As shown in Figure 2 , the stator 2 has a plurality of coil units 7. The stator 2 has coil units 7 corresponding to each phase. The plurality of coil units 7 are stacked in the rotational axis center direction DC with a non-magnetic body therebetween in the axial direction (the direction along the rotational axis center direction DC). In the present embodiment, the non-magnetic body is composed of a spacer 8. The plurality of coil units 7 are held by a holding member 10.

[0071] Multiple coil units 7 are joined together by means of retaining member 10. In this embodiment, multiple coil units 7 and multiple spacers 8 are alternately stacked in the rotation axis direction DC and joined together by means of retaining member 10.

[0072] Specifically, the rod portion 13 is inserted through the core insertion holes 42 of the plurality of coil units 7 and the spacer insertion holes 71 of the plurality of spacers 8. In this state, a first component 11 is installed at one end of the rod portion 13 and a second component 12 is installed at the other end of the rod portion 13, and at least one of the first component 11 and the second component 12 is fastened. In this way, the plurality of coil units 7 and the plurality of spacers 8 are clamped.

[0073] Examples of non-magnetic materials include resin, aluminum, and air. In this embodiment, spacers 8 comprising non-magnetic materials are arranged between the coil units 7 to ensure that non-magnetic materials exist between the coil units 7. The spacers 8 are arranged between the coil units 7 to suppress the influence of magnetic fields generated between each phase.

[0074] A first insulating member may also be provided between the stator 2 and the first component 11 of the retaining member 10. Alternatively, a second insulating member may be provided between the stator 2 and the second component 12 of the retaining member 10. If the retaining member 10 is formed of a non-magnetic material, the first and second insulating members may be omitted. If the retaining member 10 is formed of a magnetic material, it is preferable to provide both the first and second insulating members in the motor 1.

[0075] Reference Figures 3-9 The coil unit 7 will be described.

[0076] The coil unit 7 includes: a coil 20 having a winding portion 22 wound in a ring around a rotation axis C; and a stator core 40. Preferably, the coil unit 7 includes a coil frame 30.

[0077] like Figure 3 As shown, the coil frame 30 has a cylindrical portion 31 centered on a rotation axis C and a pair of flanges 32. The cylindrical portion 31 has a through insertion hole 31a along the rotation axis C. The through insertion hole 31a is configured to allow the first cylindrical portion 52 and the second cylindrical portion 62 of the stator core 40, described later, to enter. The pair of flanges 32 are provided at both ends of the cylindrical portion 31 in the rotation axis direction DC.

[0078] In this embodiment, one of the pair of flanges 32 of the coil holder 30 is provided with a fixing part 33 for holding the wire 21 of the coil 20. In one example, the fixing part 33 is configured as a cutout on the outer periphery of the flange 32. A through hole 31b is provided near the cylindrical portion 31 of the coil holder 30, penetrating the flange 32 or the cylindrical portion 31. In this embodiment, the through hole 31b extends from the outer peripheral surface 31e of the cylindrical portion 31 to the inner peripheral surface 31d. The through hole 31b is configured to allow the wire 21 of the coil 20 to be inserted through it.

[0079] The coil 20 is composed of a conductor 21. The conductor 21 has a core through which power is supplied and a sheath covering the core. The core is made of metal. In one example, the core is copper wire. The sheath is made of an insulator. In one example, the sheath is insulating resin.

[0080] like Figure 4 As shown, the coil 20 has a winding portion 22 and two leads extending from the winding portion 22 (hereinafter referred to as "first lead 23" and "second lead 24"). The winding portion 22 is composed of a wire 21 wound around the cylindrical portion 31 of the coil frame 30. The winding method of the wire 21 is not limited. For example, the wire 21 can be wound around the coil frame 30 with both the first lead 23 and the second lead 24 arranged radially DR on the outside of the coil frame 30. In this embodiment, the first lead 23 is arranged radially DR on the outside of the coil frame 30, and the second lead 24 is arranged radially DR on the inside of the coil frame 30. For example, by winding the wire 21 around the cylindrical portion 31 of the coil frame 30 with the second lead 24 arranged radially DR on the inside of the coil frame 30, the first lead 23 can be arranged on the outside of the coil frame 30. Thus, based on the configuration of the lead wires, with the first lead wire 23 arranged on the outer side of the coil frame 30 in the radial DR and the second lead wire 24 arranged on the inner side of the coil frame 30 in the radial DR, the coil 20 can be formed by a simple method.

[0081] The first lead 23 is the portion including one end of the conductor 21, and the second lead 24 is the portion including the other end of the conductor 21. The first lead 23 and the second lead 24 are led out from the coil 20 to the outside of the stator 2.

[0082] The stator core 40 is made of a strongly magnetic material. Examples of strongly magnetic materials include iron, nickel, cobalt, and compounds containing at least one of these. The stator core 40 is configured to hold the coil frame 30. The stator core 40 includes: a central portion 41; first claw poles 55 equally spaced around the outer periphery of the coil frame 30; and second claw poles 65 equally spaced around the outer periphery of the coil frame 30. The central portion 41 is configured as a through-hole 31a passing through the cylindrical portion 31 of the coil frame 30. The central portion 41 has a core through-hole 42 extending along the rotation axis C. The first claw poles 55 are connected at one end of the central portion 41 in the rotation axis direction DC, and the second claw poles 65 are connected at the other end of the central portion 41 in the rotation axis direction DC. When current flows through the coil 20, the second claw poles 65 have a magnetism opposite to that of the first claw poles 55. The central portion 41 is composed of a first cylindrical portion 52 of the first core 50 and a second cylindrical portion 62 of the second core 60, which will be described later. The stator core 40 is composed of multiple components. Hereinafter, an example of the stator core 40 will be described.

[0083] like Figure 2 As shown, the stator core 40 is configured to surround at least a portion of the winding portion 22 of the coil 20. The stator core 40 has a plurality of protrusions 54, 64. Viewed axially, the protrusions 54, 64 are formed alternately in a circumferential direction at both ends of the stator core 40 in the axial direction (along the direction of the rotation axis DC). The protrusions 54, 64 protrude radially toward the rotor 3 from both ends of the stator core 40 in the axial direction (along the direction of the rotation axis DC). The stator core 40 has a first core 50 on one side of the axial direction and a second core 60 on the other side of the axial direction. In this embodiment, the stator core 40 includes a first core 50 and a second core 60 coupled to the first core 50. For example, the first core 50 and the second core 60 are composed of powdered magnetic cores. The first core 50 and the second core 60 may also be composed of laminated magnetic cores.

[0084] like Figure 5 As shown, the first iron core 50 has an annular first ring portion 51, a plurality of first protrusions 54, and first claw magnetic poles 55 extending axially. The first ring portion 51 has a first cylindrical portion 52 centered on the rotation axis C and a first flange portion 53 disposed on the outer periphery of the first cylindrical portion 52. The first cylindrical portion 52 is configured to fit into the through insertion hole 31a of the cylindrical portion 31 of the coil frame 30. The first cylindrical portion 52 has a first mating surface 52a at a position near the second iron core 60 in the rotation axis direction DC.

[0085] The first flange portion 53 is provided with a plurality of first protruding portions 54 at equal intervals in the circumferential direction. In the present embodiment, six first protruding portions 54 are provided in the first flange portion 53. The first protruding portions 54 protrude from the first flange portion 53 in the radial direction DR. The faces of the first flange portion 53 and the first protruding portions 54 that are close to the coil holder 30 are flat.

[0086] The first claw magnetic poles 55 extend from the end portions of the first protruding portions 54 in the rotational axis direction DC (axial direction). The first claw magnetic poles 55 are arranged at equal intervals along a circumference that is centered on the rotational axis C of the motor 1. The first claw magnetic poles 55 are arranged so as to oppose the inner circumferential face of the rotor 3 in a state in which the rotor 3 is assembled to the stator 2 (see Figure 1 ).

[0087] As shown in Figure 6 , the second core 60 has a ring-shaped second ring portion 61, a plurality of second protruding portions 64, and second claw magnetic poles 65 that extend in the axial direction. The second ring portion 61 has a second cylindrical portion 62 that is centered on the rotational axis C and a second flange portion 63 that is provided to the outer circumference of the second cylindrical portion 62. The second cylindrical portion 62 is fitted into the through insertion hole 31a of the cylindrical portion 31 of the coil holder 30. The second cylindrical portion 62 has a second joining surface 62a at a position that is close to the first core 50 in the rotational axis direction DC. The second joining surface 62a is in contact with the first joining surface 52a (see Figure 9 ).

[0088] The second flange portion 63 is provided with a plurality of second protruding portions 64 at equal intervals in the circumferential direction. In the present embodiment, six second protruding portions 64 are provided in the second flange portion 63. The second protruding portions 64 protrude from the second flange portion 63 in the radial direction DR. The faces of the second flange portion 63 and the second protruding portions 64 that are close to the coil holder 30 are flat.

[0089] The second claw magnetic poles 65 extend from the end portions of the second protruding portions 64 in the rotational axis direction DC (axial direction). The second claw magnetic poles 65 are arranged between the first claw magnetic poles 55 (see Figure 7 ). Specifically, the second claw magnetic poles 65 are arranged at intermediate positions of two first claw magnetic poles 55 in the circumferential direction that is centered on the rotational axis C. The second claw magnetic poles 65 are arranged so as to oppose the inner circumferential face of the rotor 3 in a state in which the rotor 3 is assembled to the stator 2 (see Figure 1 ). The first claw magnetic poles 55 and the second claw magnetic poles 65 are alternately arranged in the circumferential direction, respectively.

[0090] As shown in Figure 9As shown, the second iron core 60 is joined to the first iron core 50 by contacting the first joint surface 52a of the first iron core 50 with the second joint surface 62a. The second cylindrical portion 62 of the second iron core 60 is connected to the first cylindrical portion 52 of the first iron core 50 by pressing, welding, welding, or bonding. In this embodiment, the portion formed by joining the first cylindrical portion 52 of the first iron core 50 and the second cylindrical portion 62 of the second iron core 60 is called the joint portion 43. The iron core through insertion hole 42 of the central portion 41 is formed by connecting the first through insertion hole 52b of the first cylindrical portion 52 and the second through insertion hole 62b of the second cylindrical portion 62.

[0091] In this embodiment, a core gap 66 is provided between the first core 50 and the second core 60 at the joint 43. The core gap 66 is configured to allow at least one of the first lead 23 and the second lead 24 to pass through and be inserted. In this embodiment, as the core gap 66, a cutout 67 is provided in the first cylindrical portion 52 of the first core 50 for the second lead 24 to pass through and be inserted.

[0092] like Figure 9 As shown, the coil holder 30 is housed within an annular space formed between the first iron core 50 and the second iron core 60. As described above, the first cylindrical portion 52 of the first iron core 50 and the second cylindrical portion 62 of the second iron core 60 enter the through insertion hole 31a of the coil holder 30. The coil holder 30 is held by the first flange portion 53 of the first iron core 50 and the second flange portion 63 of the second iron core 60. The fixing portion 33 of the flange 32 of the coil holder 30 is disposed within a first range AR1 or a second range AR2 (see reference). Figure 7 ).

[0093] like Figure 7 As shown, the first range AR1 is the range within the stator core 40 surrounded by two adjacent first protrusions 54 and a first ring portion 51. More specifically, the first range AR1 is the range, viewed from the rotation axis direction DC, surrounded by the first ring portion 51, the two adjacent first protrusions 54, and the second claw poles 65 disposed between the two adjacent first protrusions 54.

[0094] The second range AR2 is the range surrounded by two adjacent second protrusions 64 and a second ring 61. More specifically, the second range AR2 is the range surrounded by the second ring 61, the two adjacent second protrusions 64, and the first claw magnetic pole 55 disposed between the two adjacent second protrusions 64 when viewed from the rotation axis direction DC.

[0095] Preferably, the fixing portion 33 of the flange 32 of the coil holder 30 is disposed within the first range AR1, between the second claw magnetic pole 65 and the winding portion 22 of the coil 20. Alternatively, the fixing portion 33 of the flange 32 of the coil holder 30 is disposed within the second range AR2, between the first claw magnetic pole 55 and the winding portion 22 of the coil 20.

[0096] At least one of the first lead 23 and the second lead 24 is led out from either the first range AR1 or the second range AR2. Furthermore, at least one of the first lead 23 and the second lead 24 is configured to pass between the stator cores 40 of the two coil units 7.

[0097] Preferably, at least one of the first lead 23 and the second lead 24 is drawn from between the second claw pole 65 and the coil 20 within the first range AR1. Alternatively, it may be drawn from between the first claw pole 55 and the coil 20 within the second range AR2. Furthermore, at least one of the first lead 23 and the second lead 24 is configured to pass between the stator cores 40 of the two coil units 7.

[0098] In this embodiment, the first lead 23 extends radially from the outside of the coil frame 30. The fixing portion 33 of the flange 32 of the coil frame 30 is disposed within a first range AR1 between the second claw pole 65 and the winding portion 22 of the coil 20. The first lead 23 is attached to the fixing portion 33 of the flange 32 of the coil frame 30 and extends from between the second claw pole 65 and the coil 20 within the first range AR1 of the first iron core 50.

[0099] like Figure 2 As shown, the spacer 8 is disposed between the coil units 7 as described above. The spacer 8 comprises a non-magnetic material. The spacer 8 is preferably formed of a non-magnetic material. For example, the spacer 8 is formed of resin. The spacer 8 may also contain air. The spacer 8 is configured as a plate. The spacer 8 has a spacer body portion 70. A spacer through insertion hole 71 is provided in the spacer body portion 70 for the rod portion 13 of the retaining member 10 to be inserted through.

[0100] like Figure 8 As shown, the spacer 8 has a lead wire guide 72 that guides at least one of the first lead wire 23 and the second lead wire 24. The lead wire guide 72 has an axial guide portion 72a and a radial guide portion 72b. The axial guide portion 72a is formed on the outer peripheral surface of the spacer body portion 70 such that it extends along the rotation axis direction DC. The radial guide portion 72b is connected to the axial guide portion 72a and is formed as a surface provided in the spacer body portion 70, extending from the outer peripheral edge to the inner peripheral edge of the spacer body portion 70.

[0101] It is preferable that the spacer 8 has at least one of a first engaging portion 73 (refer to Figure 8 ) that engages with the first lead wire 23 and a second engaging portion 78 (refer to Figure 24 ) that engages with the second lead wire 24. In the present embodiment, the spacer 8 has the first engaging portion 73 that engages with the first lead wire 23. The first engaging portion 73 is provided to the lead wire guide 72. The first engaging portion 73 is configured as a pair of protrusions 73a that sandwich the first lead wire 23. The pair of protrusions 73a protrude from a side surface that is configured as a groove of the lead wire guide 72.

[0102] The configuration of the first lead wire 23 and the second lead wire 24 will be described with reference to Figure 9 . Of the inner peripheral portion and the outer peripheral portion of the stator core 40, the first claw magnetic pole 55 and the second claw magnetic pole 65 are disposed in one, and the first lead wire 23 and the second lead wire 24 are disposed in the other. In the present embodiment, the first claw magnetic pole 55 and the second claw magnetic pole 65 are disposed in the outer peripheral portion in the stator core 40. The first lead wire 23 and the second lead wire 24 are disposed in the inner peripheral portion in the stator core 40. The inner peripheral portion PA of the stator core 40 indicates an inner side space of a cylinder configured by a surface including an inner peripheral surface of the core through-hole 42 of the stator core 40. The outer peripheral portion of the stator core 40 indicates an outer side space of a cylinder configured by a surface including an outer peripheral surface of the stator core 40.

[0103] Further, at least one of the first lead wire 23 and the second lead wire 24 is disposed so as to pass between the stator cores 40 of the two coil units 7. Further, at least one of the first lead wire 23 and the second lead wire 24 is disposed so as to pass through the lead wire guide 72 of the spacer 8. Further, at least one of the first lead wire 23 and the second lead wire 24 is disposed so as to pass through the core gap 66 provided between the first core 50 and the second core 60. Further, the first lead wire 23 and the second lead wire 24 are disposed along the bar guide 14.

[0104] In the present embodiment, the first lead wire 23 is drawn out from the outer side of the coil holder 30 in the radial direction DR, is disposed in the lead wire guide 72 of the spacer 8 so as to pass between the stator cores 40, is disposed in the inner peripheral portion PA in the stator core 40, and is disposed along the bar guide 14.

[0105] The second lead wire 24 is disposed on the inner side of the coil holder 30 in the radial direction DR, is inserted through the through-hole 31b of the coil holder 30 and the core gap 66 of the stator core 40, is disposed in the inner peripheral portion PA in the stator core 40, and is disposed along the bar guide 14.

[0106] As Figure 10 and Figure 11As shown, the holding member 10 is provided with the first member 11, the second member 12, and the bar portion 13. The first member 11 directly or indirectly contacts a first end surface 2a, which is one end surface of the stator 2, in the rotational axis direction DC. The second member 12 is configured to directly or indirectly contact a second end surface 2b, which is an end surface of the stator 2 on the opposite side of the first end surface 2a, in the rotational axis direction DC.

[0107] As shown, the bar portion 13 is a member that links the first member 11 and the second member 12. The first member 11 is combined with a first end portion 13a of the bar portion 13. The second member 12 is combined with a second end portion 13b of the bar portion 13 on the opposite side of the first end portion 13a. At least one of the first member 11 and the second member 12 is connected to the bar portion 13. In the present embodiment, the second member 12 is combined with the bar portion 13 by a threaded structure. The first member 11 is integrally configured with the bar portion 13. Figure 1

[0108] The bar portion 13 is configured to pass through the plurality of coil units 7. Specifically, the bar portion 13 is configured to pass through the core through insertion holes 42 of the respective stator cores 40. A bar portion guide 14 is provided on the outer periphery of the bar portion 13. The bar portion guide 14 extends along the length direction of the bar portion 13 from the vicinity of the first end portion 13a to the second end portion 13b. The bar portion guide 14 is configured to be recessed from the outer peripheral surface of the bar portion 13 so that at least one of the first lead wire 23 and the second lead wire 24 enters. In the present embodiment, six bar portion guides 14 are provided on the outer peripheral surface of the bar portion 13. The bar portion guides 14 respectively house one of the first lead wire 23 and the second lead wire 24 of each phase.

[0109] With reference to Figure 12 A manufacturing method of the motor 1 will be described.

[0110] In this example, the first member 11 and the bar portion 13 are integrally configured. The coil units 7 are pre-assembled. The first lead wire 23 and the second lead wire 24 are led out from the coils 20 of the coil units 7. The coil units 7 are embedded in the bar portion 13 with the bar portion 13 passing through the core through insertion holes 42, and the first lead wire 23 and the second lead wire 24 are arranged along the respective bar portion guides 14. The motor 1 is assembled by the following steps. After the coil unit 7 of the first phase (for example, the U phase) is embedded in the bar portion 13, the spacer 8 is embedded in the bar portion 13, and then the coil unit 7 of the second phase (for example, the V phase) is embedded in the bar portion 13. Then, the spacer 8 is embedded in the bar portion 13, and further, then the coil unit 7 of the third phase (for example, the W phase) is embedded in the bar portion 13. Then, the second member 12 is screwed into the second end portion 13b of the bar portion 13. By the tightening of the second member 12, the three coil units 7 and the two spacers 8 are held by the holding member 10.

[0111] ​The operation of the present embodiment will be described.

[0112] The first claw magnetic pole 55 and the second claw magnetic pole 65 are arranged in one of the inner peripheral portion PA and the outer peripheral portion of the stator core 40. Assuming that at least one of the first lead wire 23 and the second lead wire 24 is arranged in the same portion of the stator core 40 as the portion in which the first claw magnetic pole 55 and the second claw magnetic pole 65 are arranged, at least one of the first lead wire 23 and the second lead wire 24 is arranged in the air gap between the stator 2 and the rotor 3. In this case, at least one of the first lead wire 23 and the second lead wire 24 can come into contact with the rotor 3. In the present embodiment, the first lead wire 23 and the second lead wire 24 are routed in such a manner that they do not pass through the air gap between the rotor 3 and the stator 2 or the vicinity of the air gap. Alternatively, the first lead wire 23 and the second lead wire 24 are routed in such a manner that the portion that passes through the air gap between the rotor 3 and the stator 2 or the vicinity of the air gap is shortened. Thereby, it is possible to suppress the first lead wire 23 and the second lead wire 24 from coming into contact with the rotor 3.

[0113] The operation of the present embodiment will be described.

[0114] (1) In the motor 1, at least one of the first lead wire 23 and the second lead wire 24 of the coil 20 is arranged so as to pass between the stator cores 40 of two coil units 7. Also, the first claw magnetic pole 55 and the second claw magnetic pole 65 are arranged in one of the inner peripheral portion PA and the outer peripheral portion of the stator core 40, and the first lead wire 23 and the second lead wire 24 are arranged in the other.

[0115] According to this structure, since the first lead wire 23 and the second lead wire 24 are not arranged in the air gap between the rotor 3 and the stator 2, it is possible to suppress the first lead wire 23 and the second lead wire 24 from coming into contact with the rotor 3.

[0116] (2) The spacer 8 including a non-magnetic body is arranged between the coil units 7. At least one of the first lead wire 23 and the second lead wire 24 is arranged so as to pass through the lead wire guide 72 of the spacer 8. According to this structure, it is possible to suppress the positional displacement of the lead wire between the coil units 7.

[0117] (3) The spacer 8 has at least one of a first engagement portion 73 that engages with the first lead wire 23 and a second engagement portion 78 that engages with the second lead wire 24. According to this structure, it is possible to suppress the movement of at least one of the first lead wire 23 and the second lead wire 24 accompanying the vibration of the motor 1. Alternatively, it is possible to suppress the abrasion of at least one of the first lead wire 23 and the second lead wire 24 caused by the vibration of the lead wire accompanying the vibration of the motor 1.

[0118] (4) At least one of the first lead 23 and the second lead 24 is configured to extend from the first range AR1 or the second range AR2 and pass between the stator cores 40 of the two coil units 7. According to this structure, at least one of the first lead 23 and the second lead 24 can be easily wired.

[0119] (5) At least one of the first lead-out wire 23 and the second lead-out wire 24 is led out from between the second claw pole 65 and the coil 20 within the first range AR1. Alternatively, it is led out from between the first claw pole 55 and the coil 20 within the second range AR2. Furthermore, it is configured to pass between the stator cores 40 of the two coil units 7. According to this structure, at least one of the first lead-out wire 23 and the second lead-out wire 24 is held by the first claw pole 55 and the coil 20, or by the second claw pole 65 and the coil 20. Thus, it is possible to prevent at least one of the first lead-out wire 23 and the second lead-out wire 24 from slipping into the air gap between the rotor 3 and the stator 2.

[0120] (6) At least one of the first lead 23 and the second lead 24 is configured to pass through the inter-core gap 66 between the first core 50 and the second core 60, which is located at the joint 43 of the first core 50 and the second core 60.

[0121] When holes are provided in the first core 50 or the second core 60, the operation of passing the second lead 24 through the holes is time-consuming. In this regard, according to the above structure, during the manufacture of the motor 1, when the first core 50 and the second core 60 are combined, at least one of the first lead 23 and the second lead 24 can be configured, thereby improving the production efficiency of the motor 1.

[0122] (7) The first lead wire 23 and the second lead wire 24 are arranged along the rod guide 14 of the retaining member 10. According to this structure, it is possible to suppress the movement of the first lead wire 23 and the second lead wire 24 with the vibration of the motor 1.

[0123] (8) The motor 1 also includes a coil frame 30. The winding portion 22 of the coil 20 is composed of a wire 21 wound around the cylindrical portion 31 of the coil frame 30. The stator core 40 holds the coil frame 30. According to this structure, the coil 20 can be positioned relative to the stator core 40 through simple assembly.

[0124] <Variation Example>

[0125] Hereinafter, several variations of the motor 1 according to the above embodiment will be described. In the description of the variations, for convenience, structures identical to those in the embodiment will be labeled with the same reference numerals, and their structural descriptions will be omitted. The motor 1 in each of the following variations achieves substantially the same effect as the motor 1 in the embodiment.

[0126] <First Variation>

[0127] Reference Figure 13 and Figure 14 A modified example of the coil holder 30 will be described. In this example, the position where the first lead wire 23 is led out of the coil holder 30 differs from that in the previous embodiment. In the previous embodiment, the fixing portion 33 of the coil holder 30 is configured as a cutout near the outer edge of the flange 32. In this example, the fixing portion 33 of the coil holder 30 is configured as a slit 34 extending radially DR. The width of the slit 34 is configured to allow the first lead wire 23 to pass through. The first lead wire 23 is led out from near the cylindrical portion 31 of the coil holder 30. In this case, a slit is also provided in the spacer 8 (see reference). Figure 21 The first lead 23 passes through the gap 34 of the coil frame 30, the first range AR1 of the first core 50, and the gap of the spacer 8, and is guided by the rod guide 14 of the rod portion 13 of the holding member 10. Furthermore, in this example, the portion of the first lead 23 that passes through the gap of the spacer 8 is disposed between the stator cores 40. In the coil frame 30 of the above embodiment, the gap 34 of the coil frame 30 may also be used instead of the through hole 31b through which the second lead 24 passes.

[0128] <Second Variation>

[0129] Reference Figure 15 A modified example of the coil holder 30 will be described. In the above embodiment, the fixing portion 33 of the coil holder 30 is configured as a cutout near the outer edge of the flange 32. In this example, the fixing portion 33 of the coil holder 30 is configured as a through hole 35 near the cylindrical portion 31 in the flange 32. In this case, a gap is also provided in the spacer 8 (see reference). Figure 21 The first lead 23 passes through the through hole 35 of the coil frame 30, the first range AR1 of the first iron core 50, and the gap of the spacer 8, and is guided by the rod guide 14 of the rod portion 13 of the holding member 10. Alternatively, in the coil frame 30 of the above embodiment, the through hole 35 of this modified example can be used instead of the through hole 31b through which the second lead 24 passes.

[0130] <Third Variation>

[0131] Reference Figure 16 and Figure 17 A modified example of the first iron core 50 will be explained. Figure 16 and Figure 17The coil unit 7 shown includes the coil frame 30 of the second variation. In the first core 50 of the variation, a core fixing portion 56 is provided on the first flange portion 53. The core fixing portion 56 is configured as a recess that engages with the first lead wire 23. The core fixing portion 56 is located within the first range AR1 of the first core 50. The first lead wire 23 is engaged with the core fixing portion 56. As a result, movement of the first lead wire 23 caused by the vibration of the motor 1 can be suppressed.

[0132] <Fourth Variation>

[0133] Reference Figure 18 and Figure 19 A modified example of the coil holder 30 will be described. The fixing part 33 of the coil holder 30 can also be configured as a groove 36. The groove 36 is provided on the flange 32 closest to the first iron core 50 among a pair of flanges 32, and is provided on the side opposite to the side close to the coil 20. Preferably, the thickness of the flange 32 with the groove 36 is greater than the thickness of the flange 32 without the groove 36. The width of the groove 36 is configured to allow the first lead wire 23 to pass through.

[0134] <Fifth Variation>

[0135] Reference Figure 20 and Figure 21 A modified example of spacer 8 will be described. Spacer 8 has a spacer slot 75 extending radially DR. The width of spacer slot 75 is configured to allow the first lead wire 23 to pass through. Preferably, similar to the embodiment, a first engaging portion 73 that engages with the first lead wire 23 is provided in spacer slot 75. The first engaging portion 73 is composed of a pair of protrusions 73b. The ends of the pair of protrusions 73b are partially joined in the rotational axis direction DC, and separated in other parts. The shape of spacer slot 75 is maintained by the partial engagement of the pair of protrusions 73b. The first lead wire 23 is held by the separated portions of the pair of protrusions 73b.

[0136] <Sixth Variation>

[0137] Reference Figure 22 and Figure 23A variation of the spacer 8 will be described. In this example, the spacer 8 is not engaged with the rod portion 13 of the retaining member 10, but is supported and sandwiched between the coil units 7. The main body portion 77 of the spacer is ring-shaped. The inner diameter of the main body portion 77 is larger than the diameter of the rod portion 13. Preferably, the inner diameter of the main body portion 77 is approximately equal to the diameter of the coil frame 30. With the motor 1 assembled, the spacer 8 forms an air layer 77a (a non-magnetic layer) between the coil units 7. The first lead 23 passes through the main body portion 77 of the spacer. Thus, the shape of the spacer 8 is not limited to the form shown in the embodiment. The shape of the spacer 8 can be rectangular or triangular.

[0138] <Seventh Variation>

[0139] Reference Figure 24 and Figure 25 A modified example of the spacer 8 will be described. In this example, the spacer 8 has a second engaging portion 78 that engages with the second lead 24. The second engaging portion 78 is provided on the inner peripheral surface of the spacer through insertion hole 71 of the spacer 8. The second engaging portion 78 is configured as a pair of claw portions 78a that hold the second lead 24. The second lead 24 is held by the second engaging portion 78. According to this structure, movement of the second lead 24 caused by the vibration of the motor 1 can be suppressed.

[0140] <Eighth Variation>

[0141] Reference Figure 26 A modified example of the stator core 40 will be described. The first ring portion 51 of the first core 50 includes an annular connecting ring portion (not shown) connecting six first protrusions 54 and three first fitting portions 91 evenly spaced on the inner circumference of the connecting ring portion. The first fitting portions 91 extend along the rotation axis direction DC. The second ring portion 61 of the second core 60 has the same structure as the first ring portion 51 of the first core 50, including a connecting ring portion 92 and a second fitting portion 93. By fitting the second fitting portion 93 of the second core 60 between the first fitting portions 91 of the first core 50, the first core 50 and the second core 60 are joined. According to this structure, the first core 50 and the second core 60 can be joined by the fitting structure.

[0142] A core gap 66 is provided between the first fitting portion 91 and the second fitting portion 93. In this embodiment, the core gap 66 is configured as a cutout 94 in the first fitting portion 91. Alternatively, the cutout 94 may be provided in the second fitting portion 93. The cutout 94 is configured to allow the second lead wire 24 to pass through. With this configuration, during the manufacture of the motor 1, when the first core 50 and the second core 60 are joined, the second lead wire 24 can be configured, thus improving the production efficiency of the motor 1.

[0143] <Ninth Variation Example>

[0144] Preferably, the portion of at least one of the first lead 23 and the second lead 24 that contacts the stator core 40 is surrounded by an insulating member 98. This example is illustrated in the ninth and tenth modifications.

[0145] Reference Figures 27-29 The following describes a modified example of the coil frame 30 and the stator core 40. Figure 29 From Figure 28 The diagram viewed in the direction of arrow A. (See image below.) Figure 27 As shown, a protrusion 95 is provided on the cylindrical portion 31 of the coil holder 30. The protrusion 95 protrudes radially DR from the inner circumferential surface of the cylindrical portion 31. A through hole 96 is provided on the protrusion 95 for the second lead 24 to be inserted through. The protrusion 95 is made of insulating resin. Figure 28 and Figure 29 As shown, a cutout 97 is provided in the first core 50 for the protrusion 95 to enter. Thus, the portion of the second lead 24 that contacts the stator core 40 is surrounded by an insulating member 98. This structure ensures a sufficient surface distance between the second lead 24 and the stator core 40, thereby improving insulation performance.

[0146] <Tenth Variation>

[0147] Reference Figures 30-32 The following describes a modified example of the coil frame 30 and the stator core 40. Figure 32 From Figure 30 The diagram viewed in the direction of arrow B. (See image below.) Figure 30 As shown, a tube through-hole 101 for the tube 102 to pass through is provided in the cylindrical portion 31 of the coil holder 30. The tube 102 is made of insulating resin. The tube through-hole 101 extends radially DR in the cylindrical portion 31. The tube 102 is disposed in the tube through-hole 101. The second lead wire 24 is inserted through and into the tube 102. Figure 31 and Figure 32 As shown, the first core 50 is provided with a tube cutout 103 for the insertion of the tube 102. Thus, the portion of the second lead 24 that contacts the stator core 40 is surrounded by an insulating member 98. This structure ensures a sufficient surface distance between the second lead 24 and the stator core 40, thereby improving insulation performance.

[0148] like Figures 33-36As shown, the tube 104 can also be configured such that the cross-sectional area expands from the first end toward the second end. The cross-sectional area represents the area of ​​the section intersecting the line along the through hole of the tube 104. The first end is disposed on the inner circumferential surface of the cylindrical portion 31 of the coil holder 30, and the second end is disposed on the outer circumferential surface of the cylindrical portion 31 of the coil holder 30. In this case, it is preferable that the tube 104 is elastic. With such a tube 104, compared to a cylindrical tube 104, contact between the second lead 24 and the first core 50 can be suppressed. Surface distance can also be ensured.

[0149] <Eleventh Variation>

[0150] Reference Figure 35 A modified example of the coil holder 30 will be described. In this example, the coil holder 30 has a positioning part 110. Figure 37 As shown, the positioning part 110 has a first protrusion 111 and a second protrusion 112 that engage with the stator core 40. The first protrusion 111 and the second protrusion 112 are provided on the outer surface of the flange 32. In the flange 32 near the first core 50, the first protrusion 111 is configured to contact the two first protrusions 54 and the first flange portion 53 of the first core 50. In the flange 32 near the first core 50, the two first protrusions 111 are positioned symmetrically with respect to the rotation axis C. In the flange 32 near the second core 60, the second protrusion 112 is configured to contact the two second protrusions 64 and the second flange portion 63 of the second core 60. In the flange 32 near the second core 60, the two second protrusions 112 are positioned symmetrically with respect to the rotation axis C. According to this structure, the coil frame 30 can be easily positioned relative to the stator core 40.

[0151] <Twelfth Variation Example>

[0152] Reference Figure 38 and Figure 39 A modified example of the coil frame 30 will be described. In this example, the coil frame 30 has a positioning portion 110. The positioning portion 110 has a plurality of protrusions 113 that engage with the stator core 40. The plurality of protrusions 113 are provided on at least one of the two flanges 32 of the coil frame 30. The protrusions 113 are provided on the outer periphery of the flange 32 in a radially DR manner. In this embodiment, in the flange 32 that contacts the first core 50, each protrusion 113 is disposed between the first claw pole 55 and the second claw pole 65 and is configured to contact both poles. According to this structure, the coil frame 30 can be easily positioned relative to the stator core 40.

[0153] <Thirteenth Variation Example>

[0154] Reference Figure 39 A modified example of the retaining component 10 will be described. Figure 40This is a top view of the component formed by combining the first part 11 and the rod part 13. In this example, in the rod part 13 that holds the part 10, a first guide 121 and a second guide 122 are provided as rod guides 14. The first guide 121 is configured to allow three first leads 23 to enter. The second guide 122 is configured to allow three second leads 24 to enter. According to this structure, the structure of the rod part 13 can be simplified.

[0155] <Example 14>

[0156] Reference Figure 41 and Figure 40 A modified example of the retaining component 10 will be described. Figure 41 This is a top view of the component formed by combining the first part 11 and the rod part 13. In this example, a lead wire storage section 123 is provided in the rod part 13, which holds the part 10, as a rod guide 14. The lead wire storage section 123 is configured to allow three first lead wires 23 and three second lead wires 24 to enter. The lead wire storage section 123 is configured as a space within the rod part 13 along the rotation axis C. A slot 124 connected to the lead wire storage section 123 is provided on the side of the rod part 13 (see reference). Figures 42-44 ).

[0157] <Fifteenth Variation>

[0158] Reference Figure 42 A variation of spacer 8 will be described. Spacer 8 has at least one of a first bending guide 131 and a second bending guide 132. The first bending guide 131 smoothly bends the first lead 23. Specifically, the first bending guide 131 guides the first lead 23 in a manner that prevents it from bending. The second bending guide 132 smoothly bends the second lead 24. Specifically, the second bending guide 132 guides the second lead 24 in a manner that prevents it from bending.

[0159] like Figure 43 and Figure 1 As shown, the first bending guide 131 includes a first guide body portion 131a and a first guide groove 131b provided in the first guide body portion 131a. The first guide body portion 131a is provided at the portion where the inner peripheral surface of the spacer through insertion hole 71 intersects with the lead wire guide 72, and extends in the direction along the rotation axis C and in the direction guiding the first lead wire 23 (hereinafter, the lead wire guiding direction). In this embodiment, the lead wire guiding direction is toward the second component 12 (see reference). Figure 42 The first guide groove 131b is formed on the main body portion 131a of the first guide member in a continuous manner with the lead wire guide member 72. The first guide groove 131b extends in the lead wire guiding direction as it approaches the rotation axis C and curves gently.

[0160] like Figure 44 and ​ As shown, the second bending guide 132 has a second guide body portion 132a and a second guide groove 132b provided in the second guide body portion 132a. The second guide body portion 132a is provided in the inner peripheral surface of the spacer through the insertion hole 71, from which the second lead wire 24 is led out. The second guide body portion 132a extends along the inner peripheral surface of the first cylindrical portion 52 of the first core 50 from which the second lead wire 24 is led out to the vicinity of the cut portion 67 (inter-core gap 66) of the first core 50. The second guide groove 132b is formed in the second guide body portion 132a in a manner connected to the cut portion 67 of the first core 50. The second guide groove 132b extends in the lead wire guiding direction as it approaches the rotation axis C and bends gently. According to this structure, since at least one of the first lead wire 23 and the second lead wire 24 bends smoothly, bending of at least one of the first lead wire 23 and the second lead wire 24 can be suppressed.

[0161] <Other variations>

[0162] In addition to the embodiments and variations described above, the motor 1 disclosed herein may also be a combination of the variations shown below and at least two non-contradictory variations.

[0163] In this embodiment and its variations, motor 1 is an external rotor type motor with a claw-pole stator, but the technology disclosed herein can also be applied to the stator of an internal rotor type motor. In the technology disclosed herein, magnetic poles are disposed on one of the inner and outer peripheral portions of the stator core 40, and a first lead 23 and a second lead 24 are disposed on the other. Therefore, in the stator of an internal rotor type motor, the first lead 23 and the second lead 24 are disposed on the outer peripheral portion of the stator.

[0164] The embodiments of motor 1 have been described above, but it should be understood that various changes in manner or details can be made without departing from the spirit and scope of motor 1 as set forth in the claims.

Claims

1. A motor (1) comprising: a stator including a plurality of coil units (7) stacked in an axial direction with a non-magnetic body interposed; and a rotor (3) configured to be rotatable about a rotational axis, wherein each of the plurality of coil units (7) has a coil (20) having a winding portion (22) wound in a ring shape about the rotational axis, and a stator core (40) provided to surround at least a portion of a periphery of the winding portion (22) of the coil (20), the stator core (40) has a plurality of protruding portions (54, 64) formed in an alternating arrangement in a circumferential direction at both ends in the axial direction of the stator core (40) and protruding in a radial direction toward the rotor (3) from both ends in the axial direction of the stator core (40), the coil (20) has the winding portion (22) and two lead wires extending from the winding portion (22), at least one of a first lead wire (23) and a second lead wire (24) is configured to pass between the stator cores (40) of two of the coil units (7), the first lead wire (23) being one of the two lead wires, the second lead wire (24) being the other of the two lead wires, a magnetic pole is configured in one of an inner peripheral portion (PA) and an outer peripheral portion of the stator core (40), and the first lead wire (23) and the second lead wire (24) are configured in the other of the inner peripheral portion (PA) and the outer peripheral portion of the stator core (40), the first lead wire (23) and the second lead wire (24) not being configured in an air gap between the rotor and the stator, a spacer (8) including the non-magnetic body is configured between the coil units (7), the spacer (8) has a lead wire guide (72) that guides the lead wires, and at least one of the first lead wire (23) and the second lead wire (24) is configured to pass through the lead wire guide (72) of the spacer (8).

2. The motor according to claim 1, wherein the spacer (8) has at least one of a first engagement portion (73) that engages with the first lead wire (23) and a second engagement portion (78) that engages with the second lead wire (24).

3. The motor according to claim 1 or 2, wherein the spacer (8) has at least one of a first bend guide (131) that smoothly bends the first lead wire (23) and a second bend guide (132) that smoothly bends the second lead wire (24).

4. The motor according to claim 1 or 2, wherein the stator core (40) has a first ring portion (51) formed in a ring shape on one side in the axial direction, a first protruding portion (54) protruding in a radial direction from the first ring portion (51), and a first claw magnetic pole (55) provided to the first protruding portion (54) and extending in the axial direction. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The stator core (40) further has a second ring portion (61) formed annularly on the other side in the axial direction, a second protruding portion (64) protruding radially from the second ring portion (61), and a second claw magnetic pole (65) provided to the second protruding portion (64) and extending in the axial direction, The first claw magnetic poles and the second claw magnetic poles are alternately arranged in the circumferential direction, respectively, At least one of the first lead wire (23) and the second lead wire (24) is configured to be led through between the stator cores (40) of two of the coil units (7) from a first range (AR1) surrounded by two of the first protruding portions (54) and the first ring portion (51) adjacent to each other or from a second range (AR2) surrounded by two of the second protruding portions (64) and the second ring portion (61) adjacent to each other in the stator core (40).

5. The motor according to claim 4, wherein At least one of the first lead wire (23) and the second lead wire (24) is configured to be led through between the stator cores (40) of two of the coil units (7) from between the second claw magnetic pole (65) and the coil (20) in the range of the first range (AR1) or from between the first claw magnetic pole (55) and the coil (20) in the range of the second range (AR2).

6. The motor according to claim 4, wherein The stator core (40) includes: a first core (50) having the first ring portion (51), the first protruding portion (54), and the first claw magnetic pole (55); and a second core (60) having the second ring portion (61), the second protruding portion (64), and the second claw magnetic pole (65), At least one of the first lead wire (23) and the second lead wire (24) is configured to be led through an inter-core gap (66) between the first core (50) and the second core (60) provided at a joint portion (43) of the first core (50) and the second core (60).

7. The motor according to claim 5, wherein The stator core (40) includes: a first core (50) having the first ring portion (51), the first protruding portion (54), and the first claw magnetic pole (55); and a second core (60) having the second ring portion (61), the second protruding portion (64), and the second claw magnetic pole (65), At least one of the first lead wire (23) and the second lead wire (24) is configured to be led through an inter-core gap (66) between the first core (50) and the second core (60) provided at a joint portion (43) of the first core (50) and the second core (60).

8. The motor according to claim 1 or 2, wherein A plurality of the coil units (7) are joined by means of a holding member (10) having a bar portion (13) that penetrates through the plurality of the coil units (7), A bar portion guide (14) is provided on the outer periphery of the bar portion (13), The first lead wire (23) and the second lead wire (24) are arranged along the bar portion guide (14).

9. The motor according to claim 1 or 2, wherein A portion of at least one of the first lead wire (23) and the second lead wire (24) that is in contact with the stator core (40) is surrounded by an insulating member (98).

10. The motor according to claim 1 or 2, wherein The motor further includes a coil holder (30), The coil holder (30) has a cylindrical portion (31) that is centered on a rotation axis (C), The winding portion (22) of the coil (20) is composed of a wire (21) that is wound around the cylindrical portion (31) of the coil holder (30), The stator core (40) holds the coil holder (30).

Images