Motor and motor manufacturing method

Abstract

A motor (M) comprises: a stator core (1) having a yoke (21) and a plurality of teeth (22) provided on the inner periphery of the yoke (21); multi-phase coils (2); an insulator (3) disposed between the stator core (1) and the coils (2); power supply-side lead wires (2up, 2vp, 2wp) drawn out from one end of the coil (2) of each phase; neutral point-side lead wires (2uc, 2vc, 2wc) drawn out from the other end of the coil (2) of each phase and connected to each other; and a guide plate (4) formed of an insulating body and disposed at a position at one end of the stator core (1) in the axial direction thereof and on the side of the stator core opposite to the insulator (3). The power supply-side lead wires (2up, 2vp, 2wp) are routed to the guide plate (4), and the neutral point-side lead wires (2uc, 2vc, 2c) are routed between the guide plate (4) and the stator core (1).

Description

Motor and method of manufacturing the same

[0001] The present invention relates to a motor and a method for manufacturing a motor.

[0002] A motor generally includes a cylindrical stator core, three-phase coils (U, V, and W) formed by wires wound around a plurality of teeth provided on the inner periphery of the stator core, and insulators disposed between the stator core and the coils to insulate them from each other. Conventional motors are driven by applying current to the coils of each phase using, for example, a 120-degree energization drive system or a sinusoidal wave energization drive system, so that one end of each of the U-, V-, and W-phase coils must be connected to a wire and the other end of each of the U-, V-, and W-phase coils must be connected to a power source.

[0003] For this reason, in conventional motors, as shown in, for example, JP2017-208872A, one axial end of the stator core is provided with one annular neutral bus bar welded to one end of the coils of each phase, and three annular power bus bars to which the other ends of the coils of each layer are respectively welded, and these bus bars are resin-molded to form a bus bar unit, which connects the power supply unit and the circuit board to the coils of each phase.

[0004] JP2017-208872A

[0005] Conventional motors configured in this manner have a busbar unit that houses a complex-shaped busbar at one axial end of the stator core, which increases the axial length. In addition, manufacturing the busbar unit requires processing such as molding the busbar and resin molding, and both ends of each coil must be welded to the busbar, which increases processing costs and makes the processing complicated.

[0006] SUMMARY OF THE INVENTION An object of the present invention is to provide a motor and a method for manufacturing the motor that can be easily processed, reduce processing costs, and shorten the axial length.

[0007] In order to solve the above-mentioned problems, the motor of the present invention includes a stator core having a cylindrical yoke and a plurality of teeth arranged on the inner circumference of the yoke, multi-phase coils formed by wire wound around each of the teeth, insulators arranged between the stator core and the coils to insulate the stator core from the coils, power supply side lead wires led from one end of the coils of each phase to one axial side of the stator core, neutral point side lead wires led from the other end of the coils of each phase to one axial side of the stator core and connected to each other, and a guide plate made of an insulator arranged on one side of the axial side of the stator core, opposite the stator core side of the insulator, one of the power supply side lead wire and the neutral point side lead wire being arranged in the guide plate, and the other of the power supply side lead wire and the neutral point side lead wire being arranged between the guide plate and the stator core.

[0008] In a motor configured in this manner, one of the power supply lead wire and the neutral point lead wire is routed on the side of the guide plate opposite the stator core, and the other of the power supply lead wire and the neutral point lead wire is routed between the guide plate and the stator core.Since the guide plate can be sandwiched between the power supply lead wire and the neutral point lead wire, there is no need for a bus bar unit with a bus bar, and there is also no need to weld the power supply lead wire and the neutral point side lead wire to the bus bar.

[0009] Furthermore, the motor manufacturing method of the present invention is a manufacturing method for a motor comprising a stator core having a cylindrical yoke and a plurality of teeth arranged on the inner circumference of the yoke, multi-phase coils formed by wires wound around each of the teeth, and a guide plate arranged on one axial side of the stator core, the guide plate having a notch arranged on the outer circumference and a guide tube that protrudes toward the side opposite the stator core and has a slit along the axial direction, characterized in that the power supply side lead wires drawn from one end of the coils of each phase are drawn through the notch to the side opposite the stator core of the guide plate and are housed in the guide tube through the slit.

[0010] According to the method for manufacturing a motor configured in this manner, the power supply side lead wire can be easily pulled out through the notch on the side opposite the stator core of the guide plate located directly above the stator core, and can also be easily accommodated in the guide tube through the crack, thereby shortening the work time required for manufacturing and reducing costs.

[0011] FIG. 1 is a longitudinal cross-sectional view of a motor according to the present embodiment. FIG. 2 is a plan view of a bearing holder of the motor according to the present embodiment. FIG. 3 is a plan view of a stator core. FIG. 4 is a perspective view of an insulator. FIG. 5 is a perspective view of a core unit. FIG. 6(a) is a diagram illustrating a process of winding a coil around two split cores. FIG. 6(b) is a diagram illustrating a process of rotating one of the split cores around which a coil is wound to wind a crossover wire around one of the split cores. FIG. 6(c) is a diagram illustrating a process of twisting the crossover wire between the split cores around which a coil is wound and rotating one split core so that the other split core is adjacent to the other split core. FIG. 7 is a perspective view of a guide plate. FIG. 8 is a plan view of a stator. FIG. 9 is a plan view of a stator with the guide plate removed. FIG. 10 is a plan view of a stator with the guide plate removed in a motor according to a modified example of the embodiment. FIG. 11 is a perspective view of a modified guide plate. FIG. 12 is a plan view of a modified guide plate. 13 and 14 are exploded perspective views of a stator having a modified guide plate and a vibration-isolating member, respectively.

[0012] The present invention will be described below based on the embodiment shown in the drawings. As shown in Figures 1 to 9, a motor M in this embodiment includes a stator S having a stator core 1 with teeth 22, three-phase coils 2u, 2v, and 2w formed by wires wound around the teeth 22 in Figure 5, insulators 3 arranged between the stator core 1 and the coils 2u, 2v, and 2w, power supply-side lead wires 2up, 2vp, and 2wp drawn from one end of the coils 2u, 2v, and 2w of each phase, neutral-point-side lead wires 2uc, 2vc, and 2wc drawn from the other end of the coils 2u, 2v, and 2w of each phase and connected to each other, and a guide plate 4 arranged above the stator core 1 in Figure 1, and is a rotary motor that can rotate a rotor 13 rotatably inserted within the stator core 1 by energizing the coils 2u, 2v, and 2w in the stator S. In this specification, unless otherwise specified, the top and bottom in FIG. 1 will be described as the top and bottom of the motor M.

[0013] Each part of the motor M will be described in detail below. As shown in Fig. 1, the stator S is housed in a cylindrical case 5. The case 5 is cylindrical with a bottom, having a bottom 5a and a cylindrical portion 5b rising from the outer periphery of the bottom 5a. The case 5 is also provided with a hole 5c in the bottom 5a, a mounting piece 5d on the outer periphery of the bottom 5a that enables the motor M to be mounted to an external device, and an annular holding portion 5e on the inner periphery of the bottom 5a that holds a ball bearing 6.

[0014] The cylindrical portion 5b of the case 5 has a diameter that is smaller at the bottom than at the open top end. The stator core 1 is shrink-fitted or press-fitted into the reduced diameter portion of the cylindrical portion 5b, thereby fixing the stator S inside the case 5. A bearing holder 8 is attached to the inner periphery of the open end of the cylindrical portion 5b of the case 5, and holds a board 7 on which electronic components (not shown) that constitute a controller that drives the motor M are mounted, and closes the open end of the cylindrical portion 5b.

[0015] 1 and 2, the bearing holder 8 comprises a rectangular plate-shaped main body 8a, a cylindrical fitting portion 8b that protrudes from the lower end of the main body 8a and fits around the inner periphery of the open end of the cylindrical portion 5b of the case 5, a cylindrical bearing holding portion 8c that extends downward inside the fitting portion 8b of the main body 8a and has a ball bearing 9 attached to its inner periphery, six lead wire insertion holes 8d that penetrate vertically inside the fitting portion 8b of the main body 8a and allow the feed-side lead wires 2up, 2vp, and 2wp to pass through, and a plurality of mounts 8e that protrude upward from the four corners and near the center of the upper end of the main body 8a and on whose upper ends the substrate 7 is to be placed. After being placed on the mounts 8e, the substrate 7 is fixed with screws 12 that are screwed into the mounts 8e.

[0016] When the fitting portion 8b of the bearing holder 8 is fitted into the cylindrical portion 5b of the case 5, the bearing holder 8 closes the open end of the cylindrical portion 5b and seals the space between the fitting portion 8b and the case 5 by tightly adhering the seal ring 8f attached to the outer periphery of the fitting portion 8b to the inner periphery of the cylindrical portion 5b.

[0017] In addition, a cap 10 that covers the top of the main body 8a is attached above the bearing holder 8, and seal rings 11 are provided along the four sides of the main body 8a, interposed between the main body 8a and the cap 10 to seal the gap between the main body 8a and the cap 10.

[0018] The rotor 13 includes a shaft 13a, a cylindrical yoke 13b made of laminated steel plates and attached to the outer periphery of the shaft 13a, and a plurality of permanent magnets 13c attached to the outer periphery of the yoke 13b so that north and south poles appear alternately on the outer periphery in the circumferential direction. The rotor 13 is housed in the case 5, and the top and bottom of the shaft 13a are supported by ball bearings 6 held in the case 5 and ball bearings 9 held in a bearing holder 8, allowing the rotor 13 to rotate in the circumferential direction within the case 5.

[0019] The upper end of the shaft 13a of the rotor 13 is inserted into the bearing holding portion 8c of the bearing holder 8 and faces a magnetic sensor (not shown) such as a Hall element mounted on the underside of the substrate 7. A permanent magnet 14 is attached to the upper end of the shaft 13a, and the controller can grasp the rotational position of the rotor 13 by means of the magnetic sensor.

[0020] Although the motor M of this embodiment is an SPM motor having permanent magnets 13c on the outer periphery of the yoke 13b of the rotor 13, it may be an IPM motor having permanent magnets 13c embedded in the yoke 13b.

[0021] As shown in FIGS. 1 and 3, the stator core 1 is cylindrical and includes a cylindrical yoke 21 and twelve teeth 22 that protrude radially from the inner periphery of the yoke 21.

[0022] More specifically, the stator core 1 is formed by assembling into a cylindrical shape twelve split cores C, each of which includes twelve yoke portions 21 a formed by dividing the yoke 21 in the circumferential direction and teeth 22 provided at the center of each yoke portion 21 a. As described above, in the motor M of this embodiment, the stator core 1 is formed by assembling into a cylindrical shape twelve split cores C. However, instead of assembling the split cores C, the stator core 1 may be formed as a single component that includes the cylindrical yoke 21 and the teeth 22 provided on the inner periphery of the yoke 21 in an integral and inseparable manner.

[0023] 3, each split core C is formed by stacking a plurality of steel plates that are approximately T-shaped when viewed from the axial direction, and includes a yoke portion 21a that extends along the left-right direction, and teeth 22 that extend from the center of the end face of the yoke portion 21a that faces the inside of the stator core 1 toward the radially inward direction of the stator core 1. In describing the split core C and the insulator 3 described later, the direction along the circumferential direction of the stator core 1 is referred to as the circumferential direction, and the direction along the radial direction of the stator core 1 is referred to as the radial direction.

[0024] When the circumferential end faces of the yoke portions 21a of the split cores C configured in this manner are abutted against the circumferential end faces of the adjacent yoke portions 21a and the 12 split cores C are assembled into a cylindrical shape, each assembled yoke portion 21a forms a cylindrical yoke 21 in the stator core 1.

[0025] The insulators 3 are made of resin and cover the upper and lower end faces of the teeth 22 of the yoke portion 21 a of each split core C, the inner circumferential side faces of the yoke portion 21 a, and the circumferential side faces of the teeth 22. Therefore, since the motor M of this embodiment has 12 split cores C, 12 insulators 3 are attached to one stator core 1. More specifically, the insulator 3 is composed of two pieces 31, 31 divided into upper and lower pieces, with the upper piece 31 covering the upper half of the teeth 22 of each split core C and the lower piece 31 covering the lower half of the teeth 22 of each split core C. As shown in FIG. 4 , each piece 31 includes a yoke facing portion 31 a seated on the axial end face of the yoke portion 21 a of the split core C, and a coil accommodating portion 31 b connected to the end of the yoke facing portion 31 a facing inward of the stator core 1, covering the teeth 22, and accommodating the coil 2.

[0026] 4 from the center in the circumferential direction of the stator core 1 toward the anti-yoke side, which is the upper side in Fig. 4, and grooves 31d, 31d are provided on both sides of the protrusion 31c of the yoke opposing portion 31a and open from the outer circumferential side to the inner circumferential side along the radial direction of the stator core 1. The protrusion 31c also has a wiring groove 31c1 that opens from one end in the circumferential direction and leads to the other end, and a step 31h on the outer circumferential side that faces the end face of the yoke portion 21a, as shown in Fig. 1.

[0027] The coil accommodating portion 31b has a U-shaped bottom portion 31e that faces the axial end face and circumferential side face of the tooth 22, and a pair of flange portions 31f, 31g that are connected to the yoke facing side end and the anti-yoke facing side end of the bottom portion 31e and face each other.

[0028] When each piece 31, 31 of the insulator 3 configured in this manner is attached to the split core C from above and below, the teeth 22 are fitted onto the inner side of the bottom 31e of the coil accommodating portion 31b of the insulator 3, covering the upper and lower ends of the split core C, the circumferential side walls of the teeth 22, and the inner side surface of the yoke portion 21a, and forming an annular groove that accommodates the coil 2 on the outer side of the bottom 31e of the coil accommodating portion 31b.

[0029] After attaching the insulator 3 to the split core C in this manner, by winding a conductor in the annular groove of the insulator 3, a coil 2 insulated from the stator core 1 can be formed on the outer periphery of the teeth 22 without the conductor coming into contact with the split core C.

[0030] In the motor M of this embodiment, coils 2 of the same phase and connected in series are formed on two split cores C, and a continuous conductor is wound around the teeth 22 of the two split cores C to which insulators 3 are attached. After that, as shown in Fig. 5, a crossover wire i, which is a conductor wire between the coil 2 of one split core C and the coil 2 of the other split core C, is folded back to place the split cores C next to each other, and two coils 2 of the U-phase, V-phase, and W-phase are wound in series on each pair of split cores C to form two core units Cu, Cv, and Cw. The manufacturing process for the core units Cu, Cv, and Cw will be described below. However, to distinguish between the left and right split cores C for ease of understanding, the split core C located on the left side will be referred to as split core Ca, and the split core C located on the right side will be referred to as split core Cb, and the manufacturing process for the core units Cu, Cv, and Cw will be described. Specifically, to manufacture the core units Cu, Cv, and Cw, first, as shown in FIG. 6( a), a coil 2 is wound around each of two adjacent split cores Ca and Cb, each of which has a coil 2 of the same phase wound in series. Next, as shown in FIG. 6( b), the left split core Ca of the two split cores Ca and Cb around which the coil 2 is wound is rotated, and the crossover wire i of the coil 2 between the split cores Ca and Cb is wound around the left split core Ca. Furthermore, as shown in FIG. 6( c), the left split core Ca is rotated upside down in FIG. 6( b), and the crossover wire i between the split cores Ca and Cb around which the coil 2 is wound is twisted, and the left split core Ca is rotated adjacent to the right split core Cb. This completes the core units Cu, Cv, and Cw shown in FIG. 5.

[0031] That is, a total of six core units Cu, Cv, and Cw are manufactured: two core units Cu each having a U-phase coil 2 connected in series mounted thereon, two core units Cv each having a V-phase coil 2 connected in series mounted thereon, and two core units Cw each having a W-phase coil 2 connected in series mounted thereon. Then, the core units Cu, Cv, and Cw are arranged in this order in a cylindrical shape to form the stator core 1 each having the coil 2 mounted thereon.

[0032] In this way, in the motor M of this embodiment, the U-phase coil 2u, the V-phase coil 2v, and the W-phase coil 2w are each mounted continuously on two adjacent split cores C, and the coils 2 of the same phase are arranged with a phase difference of 180 degrees around the circumferential direction of the stator core 1.

[0033] Furthermore, because a continuous conductor is wound around two consecutive split cores C and the coils 2 are connected to each other without any breaks in the conductor between the split cores C, there is no need to connect the coils 2 of the same phase by welding them between the split cores C, and by drawing both ends of the conductor forming the coils 2 connected in series to the top of the stator core 1, one end of the conductor serves as a power feed side lead-out wire and the other end of the conductor serves as a neutral point side lead-out wire. In other words, one end of the conductor of the core unit Cu on which the U-phase coil 2u is mounted serves as a power feed side lead-out wire 2up in the U-phase, the other end of the conductor of the core unit Cu on which the U-phase coil 2u is mounted serves as a neutral point side lead-out wire 2uc in the U-phase, one end of the conductor of the core unit Cv on which the V-phase coil 2v is mounted serves as a power feed side lead-out wire 2vp in the V-phase, and the other end of the conductor of the core unit Cv on which the V-phase coil 2v is mounted serves as a power feed side lead-out wire 2uc in the V-phase. One end of the conductor of the core unit Cw to which the W-phase coil 2w is attached is the power supply side lead-out wire 2wp for the W phase, and the other end of the conductor of the core unit Cw to which the W-phase coil 2w is attached is the neutral point side lead-out wire 2wc for the W phase, and the power supply side lead-out wires 2up, 2vp, 2wp and the neutral point side lead-out wires 2uc, 2vc, 2wc are drawn out upward on one side of the axial direction of the stator core 1. Therefore, one stator core 1 is formed by combining six core units Cu, Cv, Cw, which are made by combining two split cores C, so a total of six lead wires 2up, 2vp, 2wp, 2up, 2vp, 2wp, two each of the power supply side lead wires 2up, 2vp, 2wp for each phase and two each of the neutral point side lead wires 2uc, 2vc, 2wc for each phase are drawn out above the stator core 1.

[0034] In the motor M of this embodiment, the stator core 1 is divided in half in the circumferential direction, and one of the core units Cu, Cv, and Cw forms the windings of the A system, while the other core unit Cu, Cv, and Cw forms the windings of the B system, and the motor M has two three-phase windings, the A system and the B system.

[0035] At the upper end in Figure 1, which is one side of the axial direction of the stator core 1 to which the coils 2 and insulators 3 are attached, a circular guide plate 4 is placed on the upper end of the protrusion 31c of each insulator 3, forming a gap between the guide plate 4 and the stator core 1 in the axial direction of the stator core 1.

[0036] As shown in FIG. 7, the guide plate 4 is made of an insulating material such as resin, and includes a plate body 41 in the form of an annular flat plate, six notches 42u1, 42u2, 42v1, 42v2, 42w1, and 42w2 opening from the outer periphery of the plate body 41, five snap fits 43 extending downward in FIG. 7 from the outer periphery of the plate body 41 and hooking onto the step portion (not shown) formed on the outer periphery side of the protrusion 31c of the insulator 3, and a plate The plate body 41 is provided with six cylindrical guide tubes 44u1, 44u2, 45v1, 45v2, 46w1, 46w2 that protrude upward in FIG. 7 from the plate body 41 on the side opposite to the stator core and accommodate the power supply side lead wires 2up, 2vp, 2wp of each phase therein, and cylindrical neutral point accommodating tubes 47a, 47b that similarly protrude upward in FIG. 7 from the plate body 41 and accommodate the connection portions of the neutral point side lead wires 2uc, 2vc, 2wc therein.

[0037] The plate body 41 is annular and includes an inner cylindrical portion 41a extending from the inner periphery. The inner cylindrical portion 41a prevents warping of the plate body 41, but the inner cylindrical portion 41a is optional. The notches 42u1, 42u2, 42v1, 42v2, 42w1, and 42w2 are provided corresponding to the six power supply lead wires 2up, 2vp, and 2wp, respectively, and are disposed directly above the core units Cu, Cv, and Cw of the corresponding phases on the plate body 41. The notches 42u1, 42u2, 42v1, 42v2, 42w1, and 42w2 are used to extend the corresponding power supply lead wires 2up, 2vp, and 2wp upward in FIG. 1 , which is the side of the plate body 41 opposite the stator core.

[0038] In this way, the notches 42u1, 42u2, 42v1, 42v2, 42w1, and 42w2 are arranged directly above the core units Cu, Cv, and Cw of the corresponding phases, respectively, so that the power supply side lead wires 2up, 2vp, and 2wp can be drawn out above the plate body 41 without having to be routed between the guide plate 4 and the stator core 1.

[0039] 7, the snap fits 43 extend downward from the outer periphery of the plate body 41 and have claws 43a at the inner side of their tips that can hook onto stepped portions 31h formed on the outer periphery of the protrusions 31c of the insulators 3. Therefore, when the guide plate 4 is placed over the upper ends of the protrusions 31c of the insulators 3, the claws 43a of the snap fits 43 hook onto stepped portions 31h formed on the outer periphery of the protrusions 31c, thereby fixing the guide plate 4 to the stator core 1. As will be described later, the power supply leads 2up, 2vp, and 2wp are routed on the upper side of the guide plate 4, opposite the stator core. However, if there is a risk of play occurring when the guide plate 4 is fixed to the insulators 3 by the snap fits 43 and the stepped portions 31h of the insulators 3, the connection points between the snap fits 43 and the insulators 3 or the contact or close proximity points between the guide plate 4 and the insulators 3 may be fixed by adhesive. When the guide plate 4 and the insulator 3 are fixed by adhesive in this manner, vibration of the power supply lead wires 2up, 2vp, and 2wp routed in the guide plate 4 can be suppressed, and fatigue due to vibration of the power supply lead wires 2up, 2vp, and 2wp can be prevented. For example, an epoxy adhesive can be used as the adhesive. Furthermore, even when the guide plate 4 is fixed to the insulator 3 by adhesive, the guide plate 4 can be temporarily fixed to the insulator 3 using snap fits 43, which makes the adhesive work easier and facilitates automation of the adhesive work.

[0040] Note that a fixing structure other than the snap fit 43 may be employed to fix the guide plate 4 to the insulator 3. For example, a protrusion extending upward from the protrusion 31c of the insulator 3 may be provided, and a hole or notch that allows the protrusion to be inserted may be provided in the guide plate 4, and the tip of the protrusion inserted into the hole or notch may be deformed by applying heat, thereby sandwiching the guide plate 4 between the protrusion 31c of the insulator 3 and the deformed tip of the protrusion.

[0041] 7 and 9 , the guide tubes 44u1, 44u2, 45v1, 45v2, 46w1, and 46w2 are provided on the plate main body 41 corresponding to the six power supply side leads 2up, 2vp, and 2wp, respectively, and are formed as conical tubes having slits 44a, 45a, and 46a formed by notches provided along the axial direction, and have protrusions 44b, 45b, and 46b protruding toward the inner periphery on both sides of the slits 44a, 45a, and 46a at the inner periphery of the upper end, which is the tip. In addition, the base ends of the guide tubes 44u1, 44u2, 45v1, 45v2, 46w1, and 46w2 are open below the plate main body 41, between the guide plate 4 and the stator core 1.

[0042] The guide tubes 44u1, 44u2, 45v1, 45v2, 46w1, and 46w2 have slits 44a, 45a, and 46a, respectively, so that the power supply side leads 2up, 2vp, and 2wp can be inserted into the guide tubes 44u1, 44u2, 45v1, 45v2, 46w1, and 46w2 from the side using the slits 44a, 45a, and 46a, thereby facilitating the operation of accommodating the power supply side leads 2up, 2vp, and 2wp into the guide tubes 44u1, 44u2, 45v1, 45v2, 46w1, and 46w2. In this embodiment, the guide tubes 44u1, 44u2, 45v1, 45v2, 46w1, and 46w2 have the slits 44a, 45a, and 46a, respectively, but some of the guide tubes 44u1, 44u2, 45v1, 45v2, 46w1, and 46w2 may be positioned directly above the power feed-side leads 2up, 2vp, and 2wp when the guide plate 4 is positioned above the stator core 1. In this manner, for those of the guide tubes 44u1, 44u2, 45v1, 45v2, 46w1, and 46w2 that are positioned directly above the power feed-side leads 2up, 2vp, and 2wp, the power feed-side leads 2up, 2vp, and 2wp can be easily inserted therein by placing the guide plate 4 over the stator core 1 from directly above. Therefore, among the guide tubes 44u1, 44u2, 45v1, 45v2, 46w1, and 46w2, those arranged directly above the power supply side leads 2up, 2vp, and 2wp do not need to have the slits 44a, 45a, and 46a.

[0043] The guide tube 44u1 accommodates the U-phase power supply lead wire 2up of the A system, and the guide tube 44u2 accommodates the U-phase power supply lead wire 2up of the B system. The guide tube 45v1 accommodates the V-phase power supply lead wire 2vp of the A system, and the guide tube 45v2 accommodates the V-phase power supply lead wire 2vp of the B system. The guide tube 46w1 accommodates the W-phase power supply lead wire 2wp of the A system, and the guide tube 46w2 accommodates the W-phase power supply lead wire 2wp of the B system.

[0044] The guide tubes 44u1, 45v1, 46w1 that house the power supply side lead wires 2up, 2vp, 2wp of the A system are arranged close to each other relative to the plate body 41, and the guide tubes 44u2, 45v2, 46w2 that house the power supply side lead wires 2up, 2vp, 2wp of the B system are arranged close to each other relative to the plate body 41 at positions spaced circumferentially from the guide tubes 44u1, 45v1, 46w1 of the A system.

[0045] The notch 42u1, which pulls the A-system U-phase power supply lead wire 2up upward from the plate body 41, is provided at a position slightly spaced from the A-system guide tube 44u1. This is because the A-system guide tubes 44u1, 45v1, and 46w1 are arranged together in one location in the circumferential direction of the plate body 41, and the guide tube 44u1 and the A-system U-phase core unit Cu are spaced apart from each other in the circumferential direction, so the notch 42u1 and the guide tube 44u1 are also spaced apart in the circumferential direction. Therefore, the plate body 41 is provided at its upper end with a guide portion 48a for guiding the A-system power supply lead wire 2up, which has been pulled out upward from the plate body 41 through the notch 42u1, into the guide tube 44u1.

[0046] In addition, in order to make it easier to accommodate the A-system U-phase power supply side lead wire 2up, which is pulled out from the notch 42u1 to the top of the plate body 41, within the guide tube 44u1, the slit 44a of the guide tube 44u1 is located in a position facing the notch 42u1 when viewed from the center of the guide tube 44u1.

[0047] The guide portion 48a is formed by a pair of linear ridges rising from the upper end of the plate body 41 and facing each other, forming a guide groove g1 between the ridges to accommodate the power supply lead wire 2up. The guide groove g1 in the guide portion 48a is located on a straight line connecting the guide tube 44u1 and the notch 42u1 and communicates with the crevice 44a in the guide tube 44u1. The guide portion 48a includes protrusions 48a1 that protrude from the opposing surfaces of the opposing ridges toward the other ridge, i.e., toward the inside of the guide groove g1. In this way, the pair of protrusions 48a1 protrude into the guide groove g1 to grip the power supply lead wire 2up accommodated inside the guide groove g1 and prevent the power supply lead wire 2up from slipping out of the guide groove g1. Therefore, the portion of the feed-side lead wire 2up extending from the notch 42u1 to be accommodated in the guide tube 44u1 is supported on the plate body 41 without being shaken by the guide portion 48a.

[0048] Therefore, the U-phase power supply lead wire 2up of the A system is pulled out from the notch 42u1 to the top of the plate body 41, passes along the upper end surface of the plate body 41 through the guide groove g1 of the guide portion 48a, and is housed in the guide tube 44u1, with its tip protruding upward from the guide tube 44u1. In this way, the guide portion 48a supports, on the plate body 41, the U-phase power supply lead wire 2up that is pulled out to the side opposite the stator core through the notch 42u1 that is provided at the position farthest from the guide tube 44u1 when viewing the guide plate 4 in the axial direction, and guides it to the guide tube 44u1.

[0049] Further, a notch 42v1 is provided close to the guide tube 45v1 of the A system, through which the V-phase power supply lead wire 2vp of the A system is drawn upward to the plate body 41. To facilitate accommodating the V-phase power supply lead wire 2vp of the A system drawn upward to the plate body 41 from the notch 42v1 within the guide tube 45v1, the slit 45a of the guide tube 45v1 is provided in a position facing the notch 42v1 when viewed from the center of the guide tube 45v1. Thus, the V-phase power supply lead wire 2vp of the A system is drawn upward to the plate body 41 from the notch 42v1, crawls a little along the upper end surface of the plate body 41, and is then accommodated within the guide tube 45v1, with its tip protruding upward from the guide tube 45v1.

[0050] A notch 42w1 is provided close to the guide tube 46w1 of the A system, through which the W-phase power supply lead wire 2wp of the A system is drawn upward to the plate body 41. To facilitate accommodating the W-phase power supply lead wire 2wp of the A system drawn upward to the plate body 41 from the notch 42w1 within the guide tube 46w1, the slit 46a of the guide tube 46w1 is provided in a position facing the notch 42w1 when viewed from the center of the guide tube 46w1. Thus, the W-phase power supply lead wire 2wp of the A system is drawn upward to the plate body 41 from the notch 42w1, crawls a little along the upper end surface of the plate body 41, and is then accommodated within the guide tube 46w1, with its tip protruding upward from the guide tube 46w1.

[0051] As shown in Figure 8, the guide tube 44u2 of the B system is disposed directly above the end of the conductor forming the U-phase coil 2 of the core unit Cu of the B system, so that a notch 42u2 opens on the outer periphery of the guide tube 44u2 relative to the plate body 41, and the opening at the base end of the guide tube 44u2 is directly connected to the notch 42u2. The guide tube 44u2 directly accommodates the power supply-side lead wire 2up without having it run along the upper end surface of the plate body 41. To make it easier to accommodate the power supply-side lead wire 2up of the U-phase of the B system, which is drawn out from the notch 42u2 to the upper side of the plate body 41, within the guide tube 44u2, a slit 44a of the guide tube 44u2 is provided at a position facing the outer periphery of the plate body 41 relative to the guide tube 44u2 and is connected to the notch 42u2. Therefore, the U-phase feeder lead wire 2up of the B system is pulled out from the notch 42u2 to the top of the plate body 41, and then is housed in the guide tube 44u2 as is, with the tip end protruding upward from the guide tube 44u2.

[0052] A notch 42v2 is provided close to the guide tube 45v2 of system B, through which the V-phase power supply lead wire 2vp of system B is drawn upwardly from the plate body 41. To facilitate accommodating the V-phase power supply lead wire 2vp of system B drawn upwardly from the notch 42v2 within the guide tube 45v2, the slit 45a of the guide tube 45v2 is positioned facing the notch 42v2 when viewed from the center of the guide tube 45v2. Thus, the V-phase power supply lead wire 2vp of system B is drawn upwardly from the notch 42v2 to the plate body 41, then crawls a little along the upper end surface of the plate body 41 before being accommodated within the guide tube 45v2, with its tip protruding upwardly from the guide tube 45v2.

[0053] The notch 42w2, through which the W-phase power supply lead wire 2wp of the B system is drawn upward from the plate body 41, is provided at a position slightly spaced from the B-system guide tube 46w2. This is because the B-system guide tubes 44u2, 45v2, and 46w2 are arranged together in one circumferential position on the plate body 41, and the guide tube 46w2 and the W-phase core unit Cw of the B system are spaced apart from each other in the circumferential direction, so the notch 42w2 and the guide tube 46w2 are also spaced apart in the circumferential direction. For this reason, the plate body 41 is provided at its upper end with a guide portion 48b for guiding the B-system power supply lead wire 2wp drawn upward from the plate body 41 through the notch 42w2 into the guide tube 46w2.

[0054] In addition, in order to make it easier to accommodate the W-phase power supply side lead wire 2wp of the B system, which is pulled out from the notch 42w2 to the top of the plate body 41, within the guide tube 46w2, the crack 46a of the guide tube 46w2 is located in a position facing the notch 42w2 when viewed from the center of the guide tube 46w2.

[0055] Like the guide portion 48a, the guide portion 48b is formed by a pair of linear ridges rising from the upper end of the plate body 41 and facing each other, forming a guide groove g2 for accommodating the power supply lead wire 2wp between the ridges. The guide groove g2 in the guide portion 48b is located on a straight line connecting the guide tube 46w2 and the notch 42w2 and communicates with the gap 46a in the guide tube 46w2. The guide portion 48b includes protrusions 48b1 that protrude from the opposing surfaces of the opposing ridges toward the other ridge, i.e., toward the inside of the guide groove g2. The pair of protrusions 48b1 protrude into the guide groove g2 to grip the power supply lead wire 2wp accommodated in the guide groove g2 and prevent the power supply lead wire 2wp from slipping out of the guide groove g2. Therefore, the portion of the feed-side lead wire 2wp extending from the notch 42w2 to be accommodated in the guide tube 46w2 is supported on the plate body 41 without being shaken by the guide portion 48b.

[0056] Therefore, the W-phase power supply lead wire 2wp of system B is pulled out from the notch 42w2 to the top of the plate body 41, passes along the upper end surface of the plate body 41, passes through the guide groove g2 of the guide portion 48b, and is housed in the guide tube 46w2, with its tip protruding upward from the guide tube 46w2. In this way, the guide portion 48b supports, on the plate body 41, the W-phase power supply lead wire 2wp of system B, which is pulled out to the side opposite the stator core through the notch 42w2 provided at the position farthest from the guide tube 46w2 when viewed in the axial direction of the guide plate 4, and guides it to the guide tube 46w2.

[0057] In this way, the six power supply side lead wires 2up, 2vp, and 2wp are each drawn above the guide plate 4 and arranged on the upper side of the guide plate 4 that is the side opposite the stator core, with their tips protruding upward through the corresponding guide tubes 44u1, 44u2, 45v1, 45v2, 46w1, and 46w2. Arranging the lead wires on the side opposite the stator core of the guide plate 4 also includes a configuration in which some of the lead wires are directly housed in the guide tube without all of the lead wires running along the top surface of the plate main body 41 that is the side opposite the stator core. Therefore, the configuration of this embodiment in which the power supply side lead wire 2up of the U phase of the B system is directly housed in the guide tube 44u2 directly above without running over the plate main body 41, while the remaining power supply lead wires run above the plate main body 41 and are housed in the guide tube, is included as one configuration in which the lead wires are arranged on the side opposite the stator core of the guide plate 4.

[0058] The neutral point accommodating cylinder 47a is provided for the purposes of accommodating and insulating the connection portions of the neutral point side lead wires 2uc, 2vc, and 2wc of the A system, and is provided in close proximity to the guide cylinders 44u1, 45v1, and 46w1 of the A system on the plate body 41. The neutral point accommodating cylinder 47b is provided for the purposes of accommodating and insulating the connection portions of the neutral point side lead wires 2uc, 2vc, and 2wc of the B system, and is provided in close proximity to the guide cylinders 44u2, 45v2, and 46w2 of the B system on the plate body 41. The neutral point accommodating cylinders 47a and 47b are both cylindrical and protrude upward from the plate body 41, with their base ends open to the gap between the guide plate 4 below the plate body 41 and the stator core 1.

[0059] The neutral point housing tubes 47a, 47b have a larger diameter than the guide tubes 44u1, 44u2, 45v1, 45v2, 46w1, 46w2 to accommodate the connection portions of the three connected neutral point side leads 2uc, 2vc, 2wc. The neutral point side leads 2uc, 2vc, 2wc of system A are connected by welding together, and the neutral point side leads 2uc, 2vc, 2wc of system B are similarly connected by welding together. In addition, the neutral point housing tubes 47a, 47b each have a window 47a1, 47b1 that opens from the base end to the center in the axial direction, facing the outer periphery of the plate body 41.

[0060] 9, the neutral point side lead wires 2uc, 2vc, 2wc of system A are routed from the end of the coil 2 mounted in the coil accommodating portion 31b through the groove 31d of the upper piece 31 of the insulator 3 and housed in the wiring groove 31c1 of the protrusion 31c, and then connected to each other by welding at a position facing the neutral point housing cylinder 47a. Because the neutral point side lead wires 2uc, 2vc, 2wc are routed through the wiring groove 31c1 formed in the insulator 3, they are insulated from the coil 2 and their connection portions can be housed in the neutral point housing cylinder 47a. Furthermore, since the neutral point side lead wires 2uc, 2vc, and 2wc of system A are pulled out from the coils 2 of the core units Cu, Cv, and Cw, respectively, and the connection portions are housed in one neutral point housing tube 47a, two or three of the neutral point side lead wires 2uc, 2vc, and 2wc of system A are housed in one wiring groove 31c1 and may come into contact, but since these are the connection portions, there is no need to particularly insulate the neutral point side lead wires 2uc, 2vc, and 2wc from each other.

[0061] In this way, the neutral point side lead wires 2uc, 2vc, 2wc of system A are routed between the guide plate 4 and the stator core 1, and then their connection portions are raised upward. When the guide plate 4 is placed on the insulator 3, the neutral point side lead wires 2uc, 2vc, 2wc are housed in the neutral point housing cylinder 47a by utilizing the window 47a1. The neutral point housing cylinder 47a protects the connection portions of the neutral point side lead wires 2uc, 2vc, 2wc and insulates them from the coil 2 and the feed side lead wires 2up, 2vp, 2wp. Furthermore, because the neutral point housing cylinder 47a has the window 47a1, the connection portions of the neutral point side lead wires 2uc, 2vc, 2wc can be easily housed in the neutral point housing cylinder 47a by utilizing the window 47a1, even when a conductor having a thick wire and strong stiffness is used. 1 of the insulator 3, and is disposed on the side opposite to the stator core from the neutral point side lead wires 2uc, 2vc, and 2wc of the A-system routed in the routing groove 31c1. In other words, the neutral point side lead wires 2uc, 2vc, and 2wc of the A-system routed in the routing groove 31c1 as described above are routed between the guide plate 4 and the stator core 1.

[0062] As shown in Figure 9, the neutral point side lead wires 2uc, 2vc, and 2wc of system B, like the neutral point side lead wires 2uc, 2vc, and 2wc of system A, are accommodated in the routing groove 31c1 of the convex portion 31c from the end of the coil 2 attached to the coil accommodating portion 31b through the groove 31d of the upper piece 31 of the insulator 3 and routed circumferentially, and then connected to each other by welding at a position opposite the neutral point accommodating tube 47b. In addition, the neutral point side lead wires 2uc, 2vc, 2wc of the B system are also drawn out from the coils 2 of the core units Cu, Cv, Cw, respectively, and the connection portions are accommodated in one neutral point accommodating tube 47b, so that two or three of the neutral point side lead wires 2uc, 2vc, 2wc of the B system are accommodated in one wiring groove 31c1 and may come into contact, but since these are the connection portions, there is no need to particularly insulate the neutral point side lead wires 2uc, 2vc, 2wc from each other.

[0063] In this way, the neutral point side leads 2uc, 2vc, and 2wc of system B are routed between the guide plate 4 and the stator core 1, and then their connection portions are raised upward. When the guide plate 4 is placed on the insulator 3, the neutral point side leads 2uc, 2vc, and 2wc are housed in the neutral point housing tube 47b using the window 47b1. The neutral point housing tube 47b protects the connection portions of the neutral point side leads 2uc, 2vc, and 2wc and insulates them from the coil 2 and the feed side leads 2up, 2vp, and 2wp. Furthermore, because the neutral point housing tube 47b has the window 47b1, the connection portions of the neutral point side leads 2uc, 2vc, and 2wc can be easily housed in the neutral point housing tube 47b using the window 47b1, even when a thick, strong conductor is used. Note that the connection of the neutral point side leads 2uc, 2vc, and 2wc may be performed by soldering instead of welding. 1 of the insulator 3, and is disposed on the side opposite to the stator core from the neutral point side lead wires 2uc, 2vc, and 2wc of the A-system routed in the routing groove 31c1. In other words, the neutral point side lead wires 2uc, 2vc, and 2wc of the A-system routed in the routing groove 31c1 as described above are routed between the guide plate 4 and the stator core 1.

[0064] In the motor M of this embodiment, neutral point accommodating tubes 47a, 47b are provided on the guide plate 4, and the connection portions of the neutral point side lead wires 2uc, 2vc, 2wc in the A system and the B system are accommodated within the neutral point accommodating tubes 47a, 47b. However, as long as the guide plate 4 can hold the connection portions, the guide plate 4 may be provided with a holding portion that holds the connection portions instead of the neutral point accommodating tubes 47a, 47b.

[0065] After the stator S formed by assembling the coils 2, insulators 3, and guide plates 4 to the stator core 1 in this manner is fixed inside the case 5, the bearing holder 8 is attached to the open end of the cylindrical portion 5b of the case 5. Through the lead-wire insertion holes 8d provided in the bearing holder 8, the tips of the guide tubes 44u1, 44u2, 45v1, 45v2, 46w1, 46w2 and neutral point accommodating tubes 47a, 47b, which accommodate the power supply side lead-out wires 2up, 2vp, 2wp and the neutral point side lead-out wires 2uc, 2vc, 2wc, protrude above the bearing holder 8, and the power supply side lead-out wires 2up, 2vp, 2wp are electrically connected to the substrate 7. In the bearing holder 8 shown in FIG. 2, of the three lead wire insertion holes 8d on the left side, the guide tubes 46w1 and 45v1 of the A system are inserted into the uppermost lead wire insertion hole 8d, the guide tube 44u1 of the A system is inserted into the central lead wire insertion hole 8d, the neutral point accommodating tube 47a of the A system is inserted into the lowermost lead wire insertion hole 8d, and the guide tube 44u2 of the B system is inserted into the uppermost lead wire insertion hole 8d of the three lead wire insertion holes 8d on the right side. The B-system guide tube 45v2 is inserted into the central lead wire insertion hole 8d, and the B-system guide tube 46w2 and neutral point accommodating tube 47b are inserted into the lowermost lead wire insertion hole 8d, but four lead wire insertion holes 8d may be provided on each side of the bearing holder 8, and the guide tubes 44u1, 44u2, 45v1, 45v2, 46w1, 46w2 and neutral point accommodating tubes 47a, 47b may each be inserted into one lead wire insertion hole 8d. In addition, one arc-shaped lead wire insertion hole 8d may be provided on each side of the bearing holder 8, with the guide tubes 44u1, 45v1, 46w1 and the neutral point accommodating tube 47a of the A system being inserted into the left lead wire insertion hole 8d, the guide tubes 44u1, 45v1, 46w1 and the neutral point accommodating tube 47a of the A system being inserted into the left lead wire insertion hole 8d, and the guide tubes 44u2, 45v2, 46w2 and the neutral point accommodating tube 47b of the B system being inserted into the right lead wire insertion hole 8d. In this embodiment, guide tubes 44u1, 44u2, 45v1, 45v2, 46w1, and 46w2 are inserted into the lead wire insertion hole 8d to prevent contact between the power supply side lead wires 2up, 2vp, and 2wp, so that multiple guide tubes can be inserted into one lead wire insertion hole 8d.

[0066] The guide tubes 44u1, 44u2, 45v1, 45v2, 46w1, 46w2 are each formed in a conical cylindrical shape tapered toward the tip, which prevents the tip of the power supply side lead wires 2up, 2vp, 2wp from wobbling, thereby improving the workability when inserting the power supply side lead wires 2up, 2vp, 2wp into the lead wire insertion holes 8d of the bearing holder 8 located at the upper part of the guide plate 4 in Fig. 1. Although the neutral point housing tubes 47a, 47b are both formed in a cylindrical shape, they may also be formed in a conical cylindrical shape tapered toward the tip to facilitate insertion into the lead wire insertion hole 8d.

[0067] In the motor M configured in this manner, the neutral point side lead-out wires 2uc, 2vc, 2wc are housed and arranged between the stator core 1 and the guide plate 4 arranged above the stator core 1, and the power supply side lead-out wires 2up, 2vp, 2wp are drawn out and arranged above the guide plate 4 in FIG. 1. Therefore, even without using a bus bar unit equipped with a bus bar, the guide plate 4 can prevent interference between the power supply side lead-out wires 2up, 2vp, 2wp and the neutral point side lead-out wires 2uc, 2vc, 2wc, and insulate them from each other.

[0068] Furthermore, in the motor M of this embodiment, the insulator 3 has routing grooves 31c1 that accommodate the neutral point side lead wires 2uc, 2vc, 2wc, and the neutral point side lead wires 2uc, 2vc, 2wc can be routed between the guide plate 4 and the stator core 1 while insulating the neutral point side lead wires 2uc, 2vc, 2wc from the coil 2. In this way, in the motor M of this embodiment, the insulator 3 has the routing grooves 31c1 as an insulating portion that insulates the neutral point side lead wires 2uc, 2vc, 2wc from the coil 2, so there is no need to cover the neutral point side lead wires 2uc, 2vc, 2wc with an insulating tube, and the motor M can be manufactured inexpensively. 10, it is also possible to eliminate the routing groove 31c1 and groove 31d of the insulator 3 and to form an insulating portion by covering the neutral point side lead wires 2uc, 2vc, 2wc with an insulating tube 70, which insulates the neutral point side lead wires 2uc, 2vc, 2wc from the coil 2, and route the neutral point side lead wires 2uc, 2vc, 2wc between the guide plate 4 and the stator core 1 and above the coil 2. In this case, it is not necessary to provide the routing groove 31c1 in the protrusion 31c of the insulator 3, and therefore the strength of the insulator 3 can be increased accordingly, and deterioration of the insulator 3 due to fatigue can be suppressed. When the insulating tube 70 is used as the insulating part, not only the wiring groove 31c1 but also the groove 31d is unnecessary because the groove 31d is only used when accommodating the neutral point side lead wires 2uc, 2vc, 2wc drawn out from the coil 2 into the wiring groove 31c1.

[0069] As described above, the motor M of this embodiment includes the stator core 1 having the cylindrical yoke 21 and the plurality of teeth 22 provided on the inner periphery of the yoke 21, the coils 2 of multiple phases formed by the conductors wound around each of the teeth 22, the insulator 3 disposed between the stator core 1 and the coils 2 to insulate the stator core 1 from the coils 2, and the power supply side lead wires 2up, 2vp, 2wp drawn from one end of the coils 2 of each phase to one side in the axial direction of the stator core 1. and neutral point side lead wires 2uc, 2vc, 2c that are drawn from the other ends of the coils 2 of each phase to one axial side of the stator core 1 and connected to each other; and a guide plate 4 made of an insulator that is arranged on one side of the axial direction of the stator core 1, on the side of the insulator 3 opposite the stator core, with the power supply side lead wires 2up, 2vp, 2wp arranged in the guide plate 4 and the neutral point side lead wires 2uc, 2vc, 2c arranged between the guide plate 4 and the stator core 1.

[0070] In the motor M configured in this manner, the power supply side leads 2up, 2vp, 2wp are routed above the guide plate 4, and the neutral point side leads 2uc, 2vc, 2wc are routed between the guide plate 4 and the stator core 1. Since the power supply side leads 2up, 2vp, 2wp and the neutral point side leads 2uc, 2vc, 2wc are separated from each other by the guide plate 4, a bus bar unit with a bus bar is not required, and there is no need to weld the power supply side leads 2up, 2vp, 2wp and the neutral point side leads 2uc, 2vc, 2wc to the bus bar. Therefore, the motor M of this embodiment can reduce processing costs and facilitate processing.

[0071] In the above description, the power supply side leads 2up, 2vp, and 2wp are routed through the guide plate 4, and the neutral point side leads 2uc, 2vc, and 2wc are routed between the guide plate 4 and the stator core 1. However, the neutral point side leads 2uc, 2vc, and 2wc may be routed through the guide plate 4, and the power supply side leads 2up, 2vp, and 2wp may be routed between the guide plate 4 and the stator core 1. When the power supply side leads 2up, 2vp, and 2wp are routed between the guide plate 4 and the stator core 1, the power supply side leads 2up, 2vp, and 2wp may be covered with an insulating tube to be insulated from the coil 2, and then led out above the guide plate 4 from a location that is easy to connect to the substrate 7. In this case, the routing grooves 31c1 and 31d of the insulator 3 are unnecessary and may be eliminated. Furthermore, according to the motor M of this embodiment, one of the power supply side lead-out wires 2up, 2vp, 2wp and the neutral point side lead-out wires 2uc, 2vc, 2wc is routed to the guide plate 4, and the other of the power supply side lead-out wires 2up, 2vp, 2wp and the neutral point side lead-out wires 2uc, 2vc, 2c is routed between the guide plate 4 and the stator core 1. This simplifies the routeing and also simplifies the structure of the motor M, making this particularly effective for a motor M equipped with multiple systems of coils 2, which tend to have complex routeing.

[0072] Furthermore, the guide plate 4 in the motor M of this embodiment has a plate main body 41 and a plurality of cylindrical guide tubes 44u1, 44u2, 45v1, 45v1, 46w1, 46w2 that protrude from the plate main body 41 toward the side opposite the stator core and are provided for the power supply side lead-out wires 2up, 2vp, 2wp of each phase, and at least one of the guide tubes 44u1, 44u2, 45v1, 45v1, 46w1, 46w2 has slits 44a, 45a, 46a that are provided along the axial direction and that allow the power supply side lead-out wires 2up, 2vp, 2wp to be inserted into the interior, and protrusions 44b, 45b, 46b that protrude toward the inner circumference on both sides of the inner periphery and that sandwich the tip-side slits 44a, 45a, 46a.

[0073] With the motor M configured in this manner, not only is it easy to insert the power supply-side leads 2up, 2vp, and 2wp into the guide tubes 44u1, 44u2, 45v1, 45v1, 46w1, and 46w2 using the gaps 44a, 45a, and 46a, facilitating assembly of the motor M, but also the protrusions 44b, 45b, and 46b prevent the power supply-side leads 2up, 2vp, and 2wp from slipping out of the guide tubes 44u1, 44u2, 45v1, 45v1, 46w1, and 46w2, thereby preventing short-circuiting between the power supply-side leads 2up, 2vp, and 2wp after assembly. Furthermore, compared to a bus bar unit that has a structure in which annular bus bars are spaced apart and arranged in the axial direction, which is bulky in the axial direction, the guide plate 4 including the plate main body 41 can be made very thin, thereby shortening the overall length of the motor M and improving the mountability of the motor M in equipment. As described above, among the guide tubes 44u1, 44u2, 45v1, 45v2, 46w1, and 46w2, those that are arranged directly above the power feed-side leads 2up, 2vp, and 2wp do not need to be provided with the slits 44a, 45a, and 46a because the power feed-side leads 2up, 2vp, and 2wp can be easily inserted inward when the guide plate 4 is placed over the stator core 1. Therefore, among the guide tubes 44u1, 44u2, 45v1, 45v2, 46w1, and 46w2, those that are not arranged directly above the power feed-side leads 2up, 2vp, and 2wp can be easily inserted inward by providing the slits 44a, 45a, and 46a.

[0074] Furthermore, the motor M of this embodiment is provided with an insulating section that insulates the feed-side lead-out wires 2up, 2vp, 2wp and the neutral-point-side lead-out wires 2uc, 2vc, 2wc that are routed between the guide plate 4 and the stator core 1 from the coils 2. As such, by providing the insulating section, the motor M can insulate the lead-out wires routed within the space R from the coils 2 even if the axial distance between the guide plate 4 and the stator core 1 is shortened, thereby further shortening the axial length of the motor M and enabling the motor M to be made more compact. When the insulator 3 has a yoke facing portion 31a that faces the yoke 21 and has a protrusion 31c that protrudes away from the yoke, a coil accommodating portion 31b that covers the teeth 22 and accommodates the coil 2, and a wiring groove 31c1 that is formed in the protrusion 31c along the circumferential direction and accommodates the feed-side lead wires 2up, 2vp, 2wp or the neutral-point-side lead wires 2uc, 2vc, 2wc to insulate them from the coil 2, and the insulating portion is formed by the wiring groove 31c1 of the insulator 3, an insulating tube is not required, thereby reducing the manufacturing cost of the motor M. Furthermore, when the insulating tube 70 is used, it is not necessary to provide the wiring groove 31c1 in the insulator 3, and therefore the strength of the insulator 3 can be increased and deterioration of the insulator 3 due to fatigue can be suppressed.

[0075] Furthermore, the stator core 1 in the motor M of this embodiment has a plurality of split cores C, each having a plurality of yoke portions 21a formed by dividing the yoke 21 circumferentially and teeth 22 provided at the center of the yoke portions 21a, and the coils 2, 2 wound in series for each phase are formed by a continuous conductor, and the coils 2 forming one phase are wound in series around two adjacent split cores C, C, and both ends of the conductor form power supply side lead wires 2up, 2vp, 2wp and neutral point side lead wires 2uc, 2vc, 2wc.

[0076] According to the motor M configured in this manner, the coils 2, 2 wound in series for each phase among the coils 2 attached to adjacent split cores C are formed by a continuous conductor, so there is no need to connect the jumper wires of the coils 2, 2 of the split cores C by welding, soldering, etc., and only the ends of the neutral point side lead wires 2uc, 2vc, 2wc of the coils 2 need to be connected by welding or soldering, which reduces the number of processing points that require welding or soldering, and since the coils 2, 2 of the same phase are attached to adjacent split cores C, C, there is no need to insulate the coils 2, 2 from each other, which makes processing easier and further reduces processing costs.

[0077] Furthermore, the guide plate 4 in the motor M of this embodiment includes notches 42u1, 42w2 that are provided on the outer periphery of the plate body 41 and through which the power supply side lead-out wires 2up, 2wp are inserted, guide grooves g1, g2 that are provided on the opposite stator core side and that accommodate the power supply side lead-out wires 2up, 2wp that are drawn out to the opposite stator core side through the notches 42u1, 42w2 while guiding them to the cracks 44a, 46a in the guide tubes 44u1, 46w2, and guide portions 48a, 48b that have a pair of protrusions 48a1, 48b1 that protrude inward of the guide grooves g1, g2 and guide the power supply side lead-out wires 2up, 2wp to the guide tubes 44u1, 46w2. In the motor M configured in this manner, the power supply side lead-out wires 2up, 2wp, which are drawn out from the notches 42u1, 42w2 away from the guide tubes 44u1, 46w2 to the side of the plate body 41 opposite the stator core, are guided by the guide portions 48a, 48b on the plate body 41, so that the power supply side lead-out wires 2up, 2wp can be easily accommodated in the guide tubes 44u1, 46w2 via the cracks 44a, 46a, and the protrusions 48a1, 48b1 prevent the power supply side lead-out wires 2up, 2wp from falling out of the guide grooves g1, g2, so that the power supply side lead-out wires 2up, 2wp are supported on the plate body 41 without shaking and are accommodated in the guide tubes 44u1, 46w2.

[0078] Furthermore, motor M of this embodiment is manufactured through a process in which power supply side lead wires 2up, 2vp, 2wp drawn from one end of coil 2 of each phase are drawn through notches 42u1, 42v1, 42w1, 42v2, 42w2 to the side of guide plate 4 opposite the stator core, and then housed in guide tubes 44u1, 45v1, 46w1, 45v2, 46v2 through cracks 44a, 45a, 46a. According to the manufacturing method of motor M configured in this manner, power supply-side leads 2up, 2vp, 2wp can be easily pulled out through notches 42u1, 42v1, 42w1, 42v2, 42w2 on the side opposite the stator core of guide plate 4 disposed directly above stator core 1, and power supply-side leads 2up, 2vp, 2wp can be easily accommodated in guide tubes 44u1, 45v1, 46w1, 45v2, 46v2 via cracks 44a, 45a, 46a. Therefore, according to the manufacturing method of motor M of this embodiment, power supply-side leads 2up, 2vp, 2wp can be easily routed on the side opposite the stator core of guide plate 4, shortening the manufacturing time and reducing costs.

[0079] 11 and 12, the guide plate 50 in the modification is made of an insulating material such as resin, and includes a plate body 51 in the shape of an annular flat plate, eight notches 52u1, 52u2, 52v1, 52v2, 52w1, 52w2, 52c1, and 52c2 opening from the outer periphery of the plate body 51, and recesses 52u1, 52u2, 52v1, 52v2, 52w1, 52w2, 52c1, and 52c2 extending downward from the outer periphery of the plate body 51 in FIG. The plate is provided with six snap fits 53, six cylindrical guide tubes 54u1, 54u2, 55v1, 55v2, 56w1, 56w2 that protrude from the plate body 51 upward in FIG. 11, which is the side opposite to the stator core, and that house the power supply side lead wires 2up, 2vp, 2wp of each phase therein, and cylindrical neutral point housing tubes 57a, 57b that similarly protrude from the plate body 51 upward in FIG. 11 and house the connection portions of the neutral point side lead wires 2uc, 2vc, 2wc therein.

[0080] The plate body 51 has an annular shape and includes an inner cylindrical portion 51a that rises from the inner periphery. The inner cylindrical portion 51a prevents the plate body 51 from warping, but the inner cylindrical portion 51a is not essential. The notches 52u1, 52u2, 52v1, 52v2, 52w1, 52w2, 52c1, and 52c2 are provided corresponding to the connection portions of the six feed-side leads 2up, 2vp, and 2wp and the two neutral-point-side leads 2uc, 2vc, and 2wc, respectively. The notches 52u1, 52u2, 52v1, 52v2, 52w1, and 52w2 corresponding to the six power supply side lead-out wires 2up, 2vp, and 2wp, respectively, are arranged directly above the core units Cu, Cv, and Cw of each phase corresponding to the plate body 51, and the notches 52c1 and 52c2 corresponding to the connection portions of the two neutral point side lead-out wires 2uc, 2vc, and 2wc are provided at any position circumferentially avoiding the installation locations of the notches 52u1, 52u2, 52v1, 52v2, 52w1, and 52w2. The notches 52u1, 52u2, 52v1, 52v2, 52w1, 52w2, 52c1, and 52c2 are used to pull out the connection portions of the corresponding power supply side leads 2up, 2vp, and 2wp and neutral point side leads 2uc, 2vc, and 2wc to the side of the plate body 51 opposite the stator core.

[0081] In this way, the notches 52u1, 52u2, 52v1, 52v2, 52w1, and 52w2 are arranged directly above the core units Cu, Cv, and Cw of the corresponding phases, respectively, so that the power supply side lead wires 2up, 2vp, and 2wp can be drawn out above the plate body 51 without having to be routed between the guide plate 50 and the stator core 1.

[0082] 11 , the snap fits 53 extend downward from the outer periphery of the plate body 51 and have claws 53a at the inner side of their tips that hook onto stepped portions 31h formed on the outer periphery of the protrusions 31c of the insulator 3. Therefore, when the guide plate 50 is placed on the insulator 3, the claws 43a of the snap fits 43 hook onto the stepped portions 31h formed on the outer periphery of the corresponding protrusions 31c of the insulator 3, thereby fixing the guide plate 4 to the stator core 1. Note that the connection points between the snap fits 53 and the insulator 3 or the points where the guide plate 50 and the insulator 3 abut or are close to each other may be fixed by adhesive. Furthermore, a fixing structure other than the snap fits 53 may be used to fix the guide plate 50 to the insulator 3.

[0083] As shown in FIGS. 11 and 12, the guide tubes 54u1, 54u2, 55v1, 55v2, 56w1, and 56w2 are formed as conical tubes, and are provided on the plate body 51 corresponding to the six power supply side leads 2up, 2vp, and 2wp, respectively.

[0084] The guide tube 54u1 accommodates the U-phase power supply lead wire 2up of the A system, and the guide tube 54u2 accommodates the U-phase power supply lead wire 2up of the B system. The guide tube 55v1 accommodates the V-phase power supply lead wire 2vp of the A system, and the guide tube 55v2 accommodates the V-phase power supply lead wire 2vp of the B system. The guide tube 56w1 accommodates the W-phase power supply lead wire 2wp of the A system, and the guide tube 56w2 accommodates the W-phase power supply lead wire 2wp of the B system.

[0085] The guide tubes 54u1, 55v1, 56w1 that house the power supply side lead wires 2up, 2vp, 2wp of the A system are arranged close to each other relative to the plate body 51, and the guide tubes 54u2, 55v2, 56w2 that house the power supply side lead wires 2up, 2vp, 2wp of the B system are arranged close to each other relative to the plate body 51 at positions spaced apart circumferentially from the guide tubes 54u1, 55v1, 56w1 of the A system.

[0086] The guide tubes 55v1, 56w1, 54u2, and 55v2, which are arranged close to the notches 52v1, 52w1, 52u2, and 52v2, respectively, have windows 55v11, 56w11, 54u21, and 55v21 at their base ends that open to the corresponding notches 52v1, 52w1, 52u2, and 52v2, respectively. The guide tubes 55v1, 56w1, 54u2, and 55v2 are arranged approximately directly above the split cores C around which the feed-side leads 2up, 2vp, and 2wp that they accommodate are wound.

[0087] In this way, the guide tubes 55v1, 56w1, 54u2, 55v2 have windows 55v11, 56w11, 54u21, 55v21 that open to the corresponding notches 52v1, 52w1, 52u2, 52v2, respectively, so that the power supply side leads 2up, 2vp, 2wp can be accommodated inside by utilizing the notches 52v1, 52w1, 52u2, 52v2 and the windows 55v11, 56w11, 54u21, 55v21. Specifically, the feed-side leads 2up, 2vp, and 2wp are bent so as to be cranked midway and their ends are set vertical, and the guide plate 50 is placed above the insulator 3 and stator core 1 with its axis aligned with the insulator 3 so that the vertical portions of the feed-side leads 2up, 2vp, and 2wp directly face the guide tubes 55v1, 56w1, 54u2, and 55v2. When the guide plate 50 is placed close to the insulator 3 in this state, the crank portions of the feed-side leads 2up, 2vp, and 2wp are inserted into the notches 52v1, 52w1, 52u2, and 52v2 and the windows 55v11, 56w11, 54u21, and 55v21, and the vertical portions of the feed-side leads 2up, 2vp, and 2wp can be easily inserted into the corresponding guide tubes 55v1, 56w1, 54u2, and 55v2.

[0088] The guide tubes 54u1 and 56w2 are conical tubes with axially extending notches 54a and 56a, respectively, and each has a protrusion 54b or 56b projecting toward the inner periphery of the upper end of the guide tube, on both sides of the axially extending notch 52u1 and the axially extending notch 52w2. The guide tubes also have slits 54c and 56c extending axially from the upper end of the guide tubes to the circumferentially opposite the slits 54a and 56a. The base ends of the guide tubes 54u1, 54u2, 55v1, 55v2, 56w1, and 56w2 are open below the plate body 51, between the guide plate 50 and the stator core 1.

[0089] The guide tubes 54u1, 56w2 each have a slit 54a, 56a, so that the feeder-side leads 2up, 2wp inserted through the notches 52u1, 52w2 can be inserted inward from the side using the slit 54a, 56a. The slits 54a, 56a are arranged on the guide tubes 54u1, 56w2 so as not to directly face the notches 52u1, 52w2, but the through holes 54d, 56d are arranged on the guide tubes 54u1, 56w2 so as to directly face the notches 52u1, 52w2. The slits 54a, 56a are formed along the axial direction of the guide tubes 54u1, 56w2, and the through holes 54d, 56d are formed along the circumferential direction of the guide tubes 54u1, 56w2. Therefore, the slit 54a and the through hole 54d form an L-shaped opening in the guide tube 54u1, and the slit 56a and the through hole 56d form an L-shaped opening in the guide tube 56w2.

[0090] The feed-side leads 2up, 2wp, which are inserted through the notches 52u1, 52w2 and extend horizontally relative to the plate body 51 toward the guide tubes 54u1, 56w2, have their tips bent vertically along the guide tubes 54u1, 56w2 before being inserted into the guide tubes 54u1, 56w2. At this time, the horizontal portions of the feed-side leads 2up, 2wp are inserted through the through holes 54d, 56d, and the vertical portions are inserted into the guide tubes 54u1, 56w2 through the slits 54a, 56a. Then, the bent portions of the feed-side leads 2up, 2wp are caught on the sides of the guide tubes 54u1, 56w2 that face the through holes 54d, 56d. Therefore, the portions of the power supply-side leads 2up, 2wp extending from the notches 52u1, 52w2 to the guide tubes 54u1, 56w2 are supported without vibration on the plate body 51. Furthermore, the guide tubes 54u1, 56w2 have protrusions 54b, 56b on the inner peripheries of their upper ends, which are the tips of the guide tubes 54u1, 56w2, and the intervals between the protrusions 54b, 54b and between the protrusions 56b, 56b are narrower than the diameter of the power supply-side leads 2up, 2wp. This prevents the power supply-side leads 2up, 2wp accommodated in the guide tubes 54u1, 56w2 from falling out of the guide tubes 54u1, 56w2 through the cracks 54a, 54b.

[0091] As long as the through holes 54d, 56d open to the circumferential side of the corresponding cracks 54a, 56a, respectively, allowing the power supply side lead wires 2up, 2wp to be hooked onto the guide tubes 54u1, 56w2, the shape of the through holes 54d, 56d and their installation direction relative to the guide tubes 54u1, 56w2 can be designed and modified as desired.

[0092] Since the gaps between the protrusions 54b and 56b are narrower than the diameter of the power supply lead wires 2up and 2wp, the diameter of the tip of the guide tube 54u1 or 56w2 is expanded when the power supply lead wires 2up and 2wp are passed between the protrusions 54b and 56b. The guide tubes 54u1 or 56w2 have slits 54c or 56c on the circumferential opposite side of the gaps 54a or 56a, which reduces the rigidity of the tip of the guide tube 54u1 or 56w2 and facilitates the diameter expansion. This makes it easier to pass the power supply lead wires 2up and 2wp between the protrusions 54b and 56b. Therefore, even if a thick wire diameter of the power supply side lead-out wires 2up, 2wp is used, the power supply side lead-out wires 2up, 2wp can be easily accommodated in the guide tubes 54u1, 56w2, and even if a thin wire diameter of the power supply side lead-out wires 2up, 2wp is used, the protrusions 54b, 56b can prevent the power supply side lead-out wires 2up, 2wp from falling out of the guide tubes 54u1, 56w2.

[0093] In this way, the six feed-side lead wires 2up, 2vp, and 2wp are each drawn out above the guide plate 50 and arranged on the upper side of the guide plate 50 that is the side opposite the stator core, with their tips protruding upward through the corresponding guide tubes 54u1, 54u2, 55v1, 55v2, 56w1, and 56w2. Note that arranging the lead wires on the side opposite the stator core of the guide plate 50 also includes a mode in which some of the lead wires are directly housed in the guide tube without all of the lead wires running along the top surface of the plate body 51 that is the side opposite the stator core. Therefore, the V-phase power supply side lead wire 2vp and W-phase power supply side lead wire 2wp of the A system, and the U-phase power supply side lead wire 2up and V-phase power supply side lead wire 2vp of the B system are not housed on the plate main body 51 but are directly housed in the corresponding guide tubes 55v1, 56w1, 54u2, 55v2 directly above, while the remaining two power supply side lead wires 2up, 2wp are housed above the plate main body 51 and housed in the guide tubes. This form of the present embodiment is included in one of the forms in which lead wires are routed on the side of the guide plate 50 opposite the stator core.

[0094] The neutral point accommodating cylinder 57a is provided to accommodate and insulate the connection portions of the neutral point side lead wires 2uc, 2vc, and 2wc of the A system, and is provided adjacent to the notch 52c1 in close proximity to the guide cylinders 54u1, 55v1, and 56w1 of the A system on the plate body 51. The neutral point accommodating cylinder 57b is provided to accommodate and insulate the connection portions of the neutral point side lead wires 2uc, 2vc, and 2wc of the B system, and is provided adjacent to the notch 52c2 in close proximity to the guide cylinders 54u2, 55v2, and 56w2 of the B system on the plate body 51. The neutral point accommodating cylinders 57a and 57b are both cylindrical and protrude upward from the plate body 51, with their base ends open to the gap between the guide plate 50 below the plate body 51 and the stator core 1.

[0095] The neutral point housing tubes 57a, 57b have a larger diameter than the guide tubes 54u1, 54u2, 55v1, 55v2, 56w1, 56w2 in order to accommodate the connection portions of the three connected neutral point side leads 2uc, 2vc, 2wc. The neutral point side leads 2uc, 2vc, 2wc of system A are connected together by welding, and the neutral point side leads 2uc, 2vc, 2wc of system B are similarly connected together by welding. Note that the connection of the neutral point side leads 2uc, 2vc, 2wc may be performed by soldering instead of welding. In addition, the neutral point accommodating tubes 57a, 57b each have windows 57a1, 57b1 that open from the base end to the center in the axial direction and are located facing the outer periphery of the plate body 51 and communicate with the corresponding notches 52c1, 52c2, respectively.

[0096] The neutral point side lead wires 2uc, 2vc, 2wc of system A are routed between the guide plate 50 and the stator core 1, and the connection portions of the neutral point side lead wires 2uc, 2vc, 2wc welded together are raised vertically upward. When the guide plate 50 is placed on the insulator 3, the connection portions of the neutral point side lead wires 2uc, 2vc, 2wc are housed in the neutral point housing cylinder 57a. When the connection portions of the neutral point side lead wires 2uc, 2vc, 2wc are housed in the neutral point housing cylinder 57a, the cutouts 52c1 and the windows 57a1 communicating with the cutouts 52c1 are used to facilitate insertion of the connection portions into the neutral point housing cylinder 57a.

[0097] The neutral point side lead wires 2uc, 2vc, 2wc of the B system are routed between the guide plate 50 and the stator core 1, similar to the neutral point side lead wires 2uc, 2vc, 2wc of the A system, and the connection portions of the neutral point side lead wires 2uc, 2vc, 2wc welded together are raised vertically upward. When the guide plate 50 is placed on the insulator 3, the connection portions of the neutral point side lead wires 2uc, 2vc, 2wc are housed in the neutral point housing cylinder 57b. When the connection portions of the neutral point side lead wires 2uc, 2vc, 2wc are housed in the neutral point housing cylinder 57b, the windows 57b1 communicating with the notches 52c1 and 52c2 are used to facilitate insertion of the connection portions into the neutral point housing cylinder 57b.

[0098] In the motor M of this embodiment, neutral point accommodating tubes 57a, 57b are provided on the guide plate 50, and the connection portions of the neutral point side lead wires 2uc, 2vc, 2wc in the A system and the B system are accommodated within the neutral point accommodating tubes 57a, 57b. However, since it is sufficient for the guide plate 50 to be able to hold the connection portions, the guide plate 50 may be provided with a holding portion that holds the connection portions instead of the neutral point accommodating tubes 57a, 57b.

[0099] 13, to assemble the stator S, the insulator 3 and the coil 2 are attached to the stator core 1, and the feed-side lead-out wires 2up, 2vp, and 2wp housed in the guide tubes 55v1, 56w1, 54u2, and 55v2 are bent so that their ends stand vertically, while the end of the lead-out wires inserted into the notches 52u1 and 52w2 is not bent so that it stands vertically, and the two connection portions of the neutral-point lead-out wires 2uc, 2vc, and 2wc are left standing vertically. The neutral-point lead-out wires 2uc, 2vc, and 2wc are covered with insulating tubes 70 to insulate them from the coil 2 and routed between the guide plate 50 and the stator core 1, and their ends are welded so that the integral connection portions stand vertically. After this, the guide plate 50 is positioned concentrically directly above the stator core 1, and then moved toward the insulator 3 to cover it, and the guide plate 50 of the insulator 3 is attached by snap fits 53. Then, the feed-side leads 2up, 2vp, 2wp are accommodated in the guide tubes 55v1, 56w1, 54u2, 55v2 and the notches 52u1, 52w2 of the guide plate 50, and the two connection portions of the neutral-point-side leads 2uc, 2vc, 2wc are accommodated in the neutral-point accommodation tubes 57a, 57b.

[0100] After the guide plate 50 is placed on the stator core 1 to which the coils 2 and insulators 3 are attached in this manner, as shown in FIG. 14, the power supply side lead wires 2up, 2wp inserted into the notches 52u1, 52w2 are bent and extended toward the corresponding guide tubes 54u1, 56w2, with the ends bent and standing upright, and then the end portions are accommodated in the guide tubes 54u1, 56w2 through the through holes 54d, 56d and the cracks 54a, 56a.

[0101] Then, the guide plate 50 is attached to the stator core 1 on which the coil 2 and insulator 3 are mounted, and the power supply side lead wires 2up, 2vp, 2wp and neutral point side lead wires 2uc, 2vc, 2wc of the coil 2 are arranged, thereby completing the assembly of the stator S.

[0102] After the stator S formed by assembling the coil 2, the insulator 3, and the guide plate 50 to the stator core 1 in this manner is fixed inside the case 5, the bearing holder 8 is attached to the open end of the cylindrical portion 5b of the case 5. Then, the tips of the guide tubes 54u1, 54u2, 55v1, 55v2, 56w1, 56w2 and the neutral point accommodating tubes 57a, 57b, which accommodate the power supply side lead wires 2up, 2vp, 2wp and the neutral point side lead wires 2uc, 2vc, 2wc, protrude above the bearing holder 8 through the lead wire insertion holes 8d provided in the bearing holder 8, and the power supply side lead wires 2up, 2vp, 2wp are electrically connected to the substrate 7.

[0103] When the guide tubes 54u1, 54u2, 55v1, 55v2, 56w1, 56w2 and the neutral point accommodating tubes 57a, 57b are inserted into the lead wire insertion hole 8d, as shown in Figure 13, multiple rubber bushings 60a, 61a are attached to the outer periphery of the tips of the guide tubes 54u1, 54u2, 55v1, 55v2, 56w1, 56w2 and the neutral point accommodating tubes 57a, 57b.

[0104] Four rubber bushings 60a are provided corresponding to the three closely arranged guide tubes 54u1, 55v1, 56w1 and the neutral point housing tube 57a, and these four rubber bushings 60a are connected by connecting arms 60b to form a single vibration-damping member 60. Four rubber bushings 61a are provided corresponding to the three closely arranged guide tubes 54u2, 55v2, 56w2 and the neutral point housing tube 57b, and these four rubber bushings 61a are connected by connecting arms 61b to form a single vibration-damping member 61. Note that, because the rubber bushings 60a (61a) are connected by connecting arms 60b (61b), assembly of the motor M is facilitated, but the vibration-damping member 60 (61) may be formed only by the rubber bushings 60a (61b) without the connecting arms 60b (61b).

[0105] Then, the tips of the guide tubes 54u1, 54u2, 55v1, 55v2, 56w1, 56w2 and the neutral point housing tubes 57a, 57b are inserted into the lead wire insertion hole 8d together with the rubber bushings 60a, 61a. The rubber bushings 60a, 61a are sandwiched in a compressed state between the guide tubes 54u1, 54u2, 55v1, 55v2, 56w1, 56w2 and the neutral point housing tubes 57a, 57b and the inner periphery of the lead wire insertion hole 8d of the bearing holder 8. Therefore, even if there is play when the guide plate 50 is fixed to the insulator 3 by the snap fit 53 and the step 31h of the insulator 3, the rubber bushings 60a, 61a securely fix the guide plate 50 to the bearing holder 8 without play. Since the guide plate 50 is prevented from vibrating in this way, it is possible to suppress vibration of the power supply side leads 2up, 2vp, 2wp routed in the guide plate 50, and to prevent fatigue due to vibration of the power supply side leads 2up, 2vp, 2wp. Although the vibration-isolating members 60, 61 are made of rubber, they may also be made of synthetic resin other than rubber.

[0106] In the motor M configured in this manner, the neutral point side lead-out wires 2uc, 2vc, 2wc are housed and arranged between the stator core 1 and the guide plate 50 arranged above the stator core 1, and the power supply side lead-out wires 2up, 2vp, 2wp are drawn out and arranged above the guide plate 50. Therefore, even without using a bus bar unit equipped with a bus bar, the guide plate 50 can prevent interference between the power supply side lead-out wires 2up, 2vp, 2wp and the neutral point side lead-out wires 2uc, 2vc, 2wc and insulate them from each other.

[0107] In addition, in the motor M of this embodiment, the guide plate 50 has notches 52u1, 52w2 provided on the outer periphery of the plate body 51 and through which the power supply side lead-out wires 2up, 2wp are inserted, and the guide tubes 54u1, 56w2 have through-holes 54d, 56d that open to the cracks 54a, 56a and allow the power supply side lead-out wires 2up, 2wp that are drawn out to the side opposite the stator core through the notches 52u1, 52w2 to be inserted and hooked. With the motor M configured in this manner, when the power supply side lead-out wires 2up, 2wp are inserted into the through holes 54d, 56d to be accommodated in the guide tubes 54u1, 56w2, the power supply side lead-out wires 2up, 2wp are caught on the guide tubes 54u1, 56w2, and the portions of the power supply side lead-out wires 2up, 2wp that emerge from the notches 52u1, 52w2 and are accommodated in the guide tubes 54u1, 56w2, respectively, can be supported on the plate body 51 without shaking.

[0108] Furthermore, the motor M of this embodiment includes a case 5 that houses the stator core 1, a rotor 13 that is rotatably arranged within the stator core 1, a bearing holder that is fixed to the case 5 and arranged on the opposite side of the guide plate 50 from the stator core, that holds ball bearings (bearings) 9 that support the rotor 13, and that has an insertion hole through which a guide tube is inserted, and vibration-damping members 60 and 61 that are annular and attached to the outer peripheries of the guide tubes 54u1, 54u2, 55v1, 55v2, 56w1, and 56w2 and that fit into the lead wire insertion hole 8d of the bearing holder 8.

[0109] With the motor M configured in this manner, even if play occurs between the guide plate 50 and the insulator 3, the guide plate 50 is fixed to the bearing holder 8 by the vibration-damping members 60, 61, so vibration of the power supply side lead-out wires 2up, 2vp, 2wp routed in the guide plate 50 is prevented, and fatigue due to vibration of the power supply side lead-out wires 2up, 2vp, 2wp can be prevented.

[0110] Also, a method for manufacturing a motor M is provided which includes a stator core 1 having a cylindrical yoke 21 and a plurality of teeth 22 provided on the inner periphery of the yoke 21, a plurality of coils 2 formed by winding wires around each of the teeth 22, and a guide plate 50 arranged on one side of the stator core 1 in the axial direction, the motor M having notches 52u1, 52w2 provided on the outer periphery of the guide plate 50 and a plurality of guide tubes 54u1, 54u2, 55v1, 55v2, 56w1, 56w2 protruding toward the opposite side of the stator core, and in which some of the guide tubes 54u1, 56w2 of the guide tubes 54u1, 54u2, 55v1, 55v2, 56w1, 56w2 have cracks 54a, 56a along the axial direction. and a step of accommodating power supply side lead wires 2up, 2vp, 2wp drawn from one end of coil 2 of two of the phases in guide tubes 54u2, 55v1, 55v2, 56w1 that do not have slits 54a, 56a while covering guide plate 50 from above stator core 1, and accommodating power supply side lead wires drawn from one end of coil 2 of the remaining phase in notches 52u1, 52w2; and a step of drawing out power supply side lead wires 2up, 2vp, 2wp inserted into notches 52u1, 52w2 to the side of guide plate 50 opposite the stator core, and accommodating them in guide tubes 54u1, 56w2 that have slits 54a, 56a through the slits 54a, 56a.

[0111] According to the manufacturing method of the motor M configured in this manner, when the guide plate 50 is positioned concentrically directly above the stator core 1 and placed close to the insulator 3, the two-phase power supply side lead wires 2up, 2vp, 2wp of the coil 2 can be accommodated within the guide tubes 54u2, 55v1, 55v2, 56w1, which do not have the cracks 54a, 56a, while being easily drawn out above the guide plate 50, and the power supply side lead wires 2up, 2wp of the remaining one-phase coil 2 can also be drawn out above the guide plate 50 via the cutouts 52u1, 52w2 and easily routed on the side of the guide plate 50 opposite the stator core, thereby shortening the manufacturing time and reducing costs.

[0112] In the above description, two systems of coils 2, system A and system B, are mounted on the stator core 1, but only one system of coils 2 may be mounted. When only one system of coils 2 is mounted on the stator core 1, if the motor has three windings, it is sufficient to provide three guide tubes and one neutral point housing tube on the guide plate 4. Furthermore, although the motor M in this embodiment is a three-phase winding motor, it may also be a five-phase winding motor.

[0113] Although the preferred embodiment of the present invention has been described in detail above, modifications, variations and changes can be made without departing from the scope of the appended claims.

[0114] 1... stator core, 2... coil, 2up, 2vp, 2wp... power supply lead wire, 2uc, 2vc, 2wc... neutral point lead wire, 3... insulator, 4, 50... guide plate, 5... case, 8... bearing holder, 8d... lead wire insertion hole, 9... ball bearing (bearing), 13... rotor, 21... yoke, 21a... yoke portion, 22... teeth, 31c1... wiring groove (insulating portion), 41, 51... plate body, 44a, 45a, 46a, 54a, 56a... Cracks, 44b, 45b, 46b, 54b, 56b... Convex portions, 44u1, 44u1, 45v1, 45v2, 46w1, 46w2, 54u1, 54u2, 55v1, 55v2, 56w1, 56w2... Guide tubes, 48a, 48b... Guide portions, 48a1, 48b1... Convex portions, 54d, 56d... Through holes, 60, 61... Vibration-proof members, 70... Insulating tube (insulating portion), C... Split core, g1, g2... Guide grooves, M... Motor

Claims

1. A motor, comprising: a stator core having a cylindrical yoke and a plurality of teeth provided on an inner circumference of the yoke; a plurality of-phase coils formed by conductor wires wound around each of the teeth; an insulator disposed between the stator core and the coils to insulate the stator core and the coils; a power supply side lead wire drawn from one end of each phase of the coils to one side in an axial direction of the stator core; a neutral point side lead wire drawn from the other end of each phase of the coils to one side in the axial direction of the stator core and connected to each other; and a guide plate formed of an insulator disposed on one side in the axial direction of the stator core and on an anti-stator core side of the insulator, wherein one of the power supply side lead wire and the neutral point side lead wire is disposed on the guide plate, and the other of the power supply side lead wire and the neutral point side lead wire is disposed between the guide plate and the stator core.

2. The motor according to claim 1, wherein the guide plate has a plate body and a plurality of cylindrical guide cylinders provided for each of the power supply side lead wires of each phase and protruding from the plate body toward the anti-stator core side, and at least one of the guide cylinders has a slit provided along an axial direction to enable insertion into the power supply side lead wire, and convex portions protruding toward the inner circumference on both sides sandwiching the slit on a tip side of the inner circumference.

3. The motor according to claim 1, wherein the insulator has a yoke facing portion facing the yoke and having a convex portion protruding toward the anti-yoke side, a coil accommodating portion covering the teeth and accommodating the coils, and a laying groove formed along a circumferential direction in the convex portion to accommodate the other of the power supply side lead wire and the neutral point side lead wire and insulate it from the coils.

4. The motor according to claim 1, further comprising an insulating tube for insulating the other of the power supply side lead wire and the neutral point side lead wire from the coils.

5. The motor according to claim 1, wherein the stator core has a plurality of divided cores each having a plurality of yoke portions obtained by dividing the yoke in the circumferential direction and teeth provided at the center of the yoke portion, coils wound in series in each phase are formed by a continuous conductor, and coils forming one phase in two adjacent divided cores are wound in series, and both ends of the conductor form the power supply side lead wire and the neutral point side lead wire.

6. The motor according to claim 2, wherein the guide plate has a notch provided on the outer periphery of the plate body through which the power supply side lead wire is inserted, a guide groove provided on the anti-stator core side for guiding and accommodating the power supply side lead wire drawn to the anti-stator core side through the notch in the crack of the guide cylinder, and a pair of convex portions protruding inside the guide groove.

7. The motor according to claim 2, wherein the guide plate has a notch provided on the outer periphery of the plate body through which the power supply side lead wire is inserted, and the guide cylinder has a through hole that opens from the side in the circumferential direction at the crack and allows the insertion and hanging of the power supply side lead wire drawn to the anti-stator core side through the notch.

8. The motor according to claim 2, comprising a case for accommodating the stator core, a rotor rotatably disposed in the stator core, a bearing holder fixed to the case and disposed on the anti-stator core side of the guide plate for holding a bearing for supporting the rotor and having a lead wire insertion hole through which the guide cylinder is inserted, and a vibration-proof member that is annular and mounted on the outer periphery of the guide cylinder and fitted into the lead wire insertion hole of the bearing holder.

9. A method of manufacturing a motor, comprising a stator core having a cylindrical yoke and a plurality of teeth provided on the inner periphery of the yoke, a plurality of phase coils formed by conducting wires wound around each of the teeth, and a guide plate disposed on one axial side of the stator core, the guide plate having a notch provided on the outer periphery and a guide cylinder protruding toward the anti-stator core side and having a slit along the axial direction, the method comprising: pulling out a power supply side lead wire drawn from one end of each phase coil through the notch to the anti-stator core side of the guide plate and accommodating the power supply side lead wire in the guide cylinder through the slit.

10. A method of manufacturing a motor, comprising a stator core having a cylindrical yoke and a plurality of teeth provided on the inner periphery of the yoke, a plurality of phase coils formed by conducting wires wound around each of the teeth, and a guide plate disposed on one axial side of the stator core, the guide plate having a notch provided on the outer periphery and a plurality of guide cylinders protruding toward the anti-stator core side, the method comprising: covering the guide plate over the stator core from above, accommodating the power supply side lead wires drawn from one ends of two-phase coils out of each phase in the guide cylinders without slits, and accommodating the power supply side lead wire drawn from one end of the remaining one-phase coil in the notch; and pulling out the power supply side lead wire inserted in the notch to the anti-stator core side of the guide plate and accommodating the power supply side lead wire through the slit in the guide cylinder having the slit.

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