JP2008125278A - Axial air gap type motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an axial air gap type motor by which routing processing from a winding portion of a winding to a cross wire, is securely performed, and connection of a neutral point is made easy. <P>SOLUTION: In the axial air gap type motor 1, a stator 2 and a rotor 3 are oppositely arranged with a predetermined air gap along an axial direction of a rotor output shaft 4 of the rotor. The stator 2 is constituted so that it is provided with a cross wire processing portion 170 on one side face, and on the other side face a neutral point connecting portion 180 is provided which connects the cross wire of the winding between different phases. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an axial air gap type electric motor in which a stator and a rotor are arranged to face each other with a predetermined gap along the axial direction of the rotor output shaft of the rotor, and more specifically, connecting wires for each phase. The present invention relates to an axial air gap type electric motor that can be safely and easily routed without making contact.

  An axial air gap type electric motor is an electric motor in which a rotor (rotor) is arranged oppositely with a predetermined gap on one or both sides of a stator (stator), as shown in Patent Document 1, for example, Compared to a radial gap type electric motor such as an inner rotor type, the thickness in the direction of the rotation axis can be reduced, that is, it can be made flat.

  Incidentally, in the axial air gap type electric motor described in Patent Document 1, a stator is formed by connecting a plurality of fan-shaped core members in an annular shape. According to this, a stator can be easily formed only by winding a winding around one core member in advance, connecting them in an annular shape and connecting them.

  After each core member is connected in a ring shape, the windings drawn from each core member are connected for each phase. In view of this, each core member is provided with a crossover support for wiring the crossover for each phase.

  However, the axial air gap type motor described in Patent Document 1 has the following problems. That is, the axial air gap type electric motor described in Patent Document 1 includes a plurality of support grooves for supporting the jumper wires for each phase, but from the coil winding portion (bobbin) to the support grooves. Since there is no means for guiding the winding in between, it is difficult to route the winding at this portion, and there is a possibility that it may come into contact with the winding of a different phase.

  Further, in the conventional axial air gap type electric motor, there is a possibility that the connecting wire supported by the connecting wire support groove and the connecting wire for forming a neutral point come into contact with each other.

Furthermore, the connected stator is integrally molded with a synthetic resin. At this time, depending on the injection pressure and speed of the resin, the fixed winding may be displaced, which may cause poor contact. It was.
JP 2004-282899 A

  Accordingly, in order to solve the above-described problems, the present invention provides an axial air gap type electric motor capable of reliably performing the routing process from the winding portion of the winding to the crossover and facilitating the connection of the neutral point. There is to do.

  In order to solve the above-described problems, the present invention has several features described below. According to the first aspect of the present invention, the stator and the rotor are arranged to face each other with a predetermined gap along the axial direction of the rotor output shaft of the rotor, and the stator is annular around the axis of the rotor output shaft. In the axial air gap type motor in which the core members are connected to each other via a predetermined connecting means, the stator has a crossover processing portion on one side surface. In addition, a neutral point connecting portion for connecting the connecting wires of the windings to different phases can be provided on the other side surface.

  According to a second aspect of the present invention, the stator and the rotor are arranged to face each other with a predetermined gap along the axial direction of the rotor output shaft of the rotor, and the stator is annular around the axis of the rotor output shaft. In the axial air gap type electric motor, the core members are connected to each other via a predetermined connecting means, each core member includes a stator core and the fixed The insulator is formed in a bobbin shape having an insulator that insulates the winding portion of the core of the core, and the insulator has a pair of flange portions parallel to the teeth surface of the stator core, and the stator is On one outer surface of the flange portion of at least one core member among the core members to be configured, current is supplied to each phase of the winding. A neutral point connection for connecting the crossover wires of the windings in different phases to the other outer surface in the axial direction of the flange portion of at least one core member among the core members constituting the stator. It is characterized in that a part can be provided.

  According to a third aspect of the present invention, in the first and second aspects, the flange portion is provided with a winding lead portion for pulling out the connecting wire of the winding to the outer periphery in the axial direction. It is said.

  According to a fourth aspect of the present invention, in the third aspect of the invention, the flange portion is provided with a plurality of the winding lead portions.

  According to a fifth aspect of the present invention, in the first to fourth aspects, the neutral point connection portion includes a metal clip that sandwiches the jumper wire in an electrically conductive state, and the flange portion includes the metal clip. A holding part for holding the clip is provided.

  According to a sixth aspect of the present invention, in the first to fifth aspects, a pair of guide ribs are provided at different positions in the radial direction on the axial side surface of the flange portion, and formed between the guide ribs. It is characterized in that a crossover is passed through the created gap.

  According to a seventh aspect of the present invention, in the above-mentioned sixth aspect, the crossover wires having different phases for forming the neutral point are respectively drawn out from the winding lead-out portion in the same circumferential direction and formed between the guide ribs. A neutral point connecting portion is provided on the core member wound around the gap and wound with a winding not related to the connecting wire.

  According to invention of Claim 1 and 2, a neutral point connection part can be easily provided by providing the crossover processing part and the neutral point connection part in a different side surface.

  According to the third aspect of the present invention, by providing a winding lead portion for pulling out a part of the winding to the outer periphery in the axial direction on the flange portion, the winding is connected to the bobbin through the winding lead portion. It can be easily pulled out from the inside to the outside, and the neutral point connection portion can be provided more easily.

  According to the fourth aspect of the present invention, since a plurality of winding lead portions are provided in the flange portion, a part of the winding can be drawn from the lead portion close to the neutral point connection portion, and the drawn winding can be shortened. .

  According to the invention described in claim 5, by connecting the neutral point of the winding for each phase with the metal clip attached to a part of the flange portion, the solder or the like is soldered to the insulator when joining by soldering or welding. Is not in direct contact with each other, it is possible to eliminate adverse effects on the insulator due to heat.

  According to invention of Claim 6, 7, a pair of guide rib is provided in the position which differs in the radial direction on the side surface of the axial direction of a flange part, and a crossover is passed to the space | gap formed between each guide rib. In addition to being able to securely fix the crossover wire, it is possible to prevent the winding from moving when integrally molded with resin.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a main part of an axial air gap type electric motor according to an embodiment of the present invention, and FIG. 2 is a perspective view of a stator.

  The axial air gap type electric motor 1 includes a stator 2 formed in a disk shape, and a pair of rotors 3 and 3 that are opposed to each other with a predetermined gap (gap) on both side surfaces of the stator 2. The rotors 3 and 3 are coaxially fixed to a rotor output shaft 4 that outputs a rotational driving force.

  The stator 2 and the rotor 3 are accommodated in a bracket (not shown). In this example, the outer peripheral surface of the stator 2 also serves as the outer peripheral wall of the bracket, and lid members (not shown) are attached to both ends thereof. In addition, you may make it attach the rotors 3 and 3 directly to a fan etc., without using a cover member.

  In the present invention, the rotors 3 and 3 are arranged on both the left and right sides of the stator 2, but only one of them may be provided. In the present invention, the rotor constitutes the axial air gap type electric motor 1. It suffices if it has the necessary functions, and can be changed arbitrarily according to the specifications.

  The rotors 3 and 3 share the same rotor output shaft 4, but may be a two-output shaft type in which each rotor 3 and 3 has a rotor output shaft. Furthermore, it is good also as a shaft-less type | mold which does not have the rotor output shaft 4, but supports the rotors 3 and 3 directly with respect to the stator 2 via a radial ball bearing.

  As shown in FIG. 2, the stator 2 includes a plurality (9 (9 slots) in this example) of core members 21a to 21i arranged in an annular shape with the rotation axis of the rotor output shaft 4 as the central axis. Yes. Since the core members 21a to 21i have the same configuration, in this example, the core member 21a will be described as an example.

  A bearing portion 23 is disposed at the center of the stator 2. In this example, the bearing portion 5 has a pair of radial ball bearings 5 a and 5 b, the inner ring is press-fitted into the rotor output shaft 4, and the outer ring side is embedded with a synthetic resin material 6. In the present invention, the configuration of the bearing portion 5 may be arbitrary.

  3 and FIGS. 4A to 4F, the core member 21a includes a coil 24 (see FIG. 4) on a bobbin-shaped stator core 23 having a pair of left and right flange-shaped tooth surfaces 22, 22. The stator core 23 is formed by laminating electromagnetic steel sheets formed in an H shape along the radial direction.

  The stator core 23 is entirely covered with an insulator 100 made of insulating resin, leaving the tooth surfaces 22 and 22. The insulator 100 includes flange portions 110 and 110 extending in the radial direction along the tooth surfaces 22 and 22, and the flange portions 110 and 110 also form part of a bobbin around which the coil 24 is wound.

  In this example, both ends of the tooth surface 22 of the stator core 23 are formed with skews that are inclined at a predetermined angle in the circumferential direction in order to reduce cogging torque. The shape is arbitrarily selected according to the specification.

  Each flange part 110, 110 is provided with connecting means for connecting the respective pole members 21a to 21i to each other. As connecting means, hook members 120 and 120 for connecting the respective pole members 21a to 21i in an annular manner around the axis of the rotor output shaft 4 are provided at the circumferential ends of the flange portions 110 and 110, respectively. Locking shafts 130 and 130 on which the hook portions 120 and 120 are locked are provided.

  Referring also to FIG. 5, the hook portions 120, 120 are protrusions projecting outward from one circumferential end (left end in FIG. 5) on the outer peripheral side of each flange portion 110. The hook groove 121 that is locked along the locking shaft 130 is provided on the upper end surface of the portion.

  The hook groove 121 is an arc groove that is locked along the outer peripheral surface of the locking shaft 130, and the core member 21 a is locked by locking the hook groove 121 to the locking shaft 130 of the adjacent core members 21 a to 21 i. ˜21i are coupled so as to be rotatable about the locking shaft 130.

  The hook portion 120 is provided with first to third guide surfaces 122 to 124 for smoothly locking the hook portion 120 to the locking shaft 130. The 1st guide surface 122 consists of a taper surface formed diagonally lower left (refer FIG. 5) toward the front-end | tip from the edge of the hook groove | channel 121. As shown in FIG.

  The second guide surface 123 is composed of a tapered surface that is formed obliquely downward to the right (see FIG. 5) from the front end of the first guide surface 122 toward the flange portion 110, and the third guide surface 124 is the second guide surface. It consists of a tapered surface formed diagonally to the left (see FIG. 5) from the end portion of 123 toward the base end of the flange portion 110.

  After connecting each core member 21a-21i to the base part of the 3rd guide surface 123 and the flange part 110, when connecting the both ends of core member 21a-21i finally, it contacts along the guide part 150. An R portion 125 is provided.

  The locking shafts 130, 130 protrude from the other end side in the circumferential direction on the outer peripheral side of each flange portion 110, 110 (end opposite to the hook portion 120). It is integrally formed in a cylindrical shape. In this example, the locking shafts 130 and 130 are provided coaxially with the flange portions 110 and 110 interposed therebetween.

  In this example, the hook portion 120 is provided on each of the flange portions 110 and 110, but the hook portion 120 may be provided on at least one flange portion 110.

  The flange portions 110 and 110 have a locking projection 161 as a connecting guide means for connecting the core members 21a to 21i more securely in an annular shape, and a locking recess as a receiver side of the locking projection 161. 162.

  As shown in FIG. 5, the locking convex portion 161 is a convex portion that protrudes outward from one circumferential end (left end in FIG. 5) of the flange portion 110, and in this example, It consists of a tongue piece formed in a triangular shape.

  On the other hand, the locking recess 162 is formed of a notch formed inward from the other circumferential end of the flange portion 110 (the right end in FIG. 5), and is shaped into the locking projection 161. Are formed in a triangular groove so as to match each other.

  In this example, the locking convex portion 161 and the locking concave portion 162 are formed in a triangular shape, but may be formed in a rectangular shape or a round shape in addition to this, and can be arbitrarily changed depending on the specification.

  Next, as shown in FIG. 4A, when the adjacent core members 21a to 21i are connected to both ends in the circumferential direction of the flange portion 110 (the front side in FIG. 4A), A pair of cutout portions 141 and 142 for forming a winding lead portion 140 for pulling out the winding 24 from between the abutting surfaces are provided.

  Referring also to FIG. 5, the notch portion 141 is formed on the end portion side having the hook portion 120 in both circumferential ends of the flange portion 110. The notch 141 is cut out in a semicircular shape from the end to the inside, and is formed at the base of the hook 120.

  The other notch portion 142 is formed on the end side of the flange portion 110 on the side having the locking shaft 130. The notches 141 and 142 are provided on the same radial line of the flange 110 in the radial direction.

  According to this, as shown in FIG. 5, the adjacent core members 21a to 21i are connected to each other so that the notches 141 and 142 provided on the abutting faces face each other, and circular winding leads Part 140 is formed. Further, since the notch portion 141 is provided at the base of the hook portion 120, the hook surface 121 of the hook portion 120 serves as a guide for the winding 24, and the winding 24 can be easily hooked on the notch portion 141. it can.

  Furthermore, in this example, the cutout portions 141 and 142 are formed in a semicircular shape so as to match each other to form a circular winding lead portion 140, but in addition to this, FIG. As shown in FIG. 4, the winding lead-out portion 140 may be formed in a groove shape by cutting out a part of one of the cutout portions 142 along the radial direction.

  Furthermore, in addition to these notches 141 and 142, as shown in FIGS. 7A and 7B, a notch groove 144 formed from the outside in the radial direction toward the inside may be provided. According to this, even after connecting the core members 21 a to 21 i, the winding 24 can be held in the winding lead-out portion 140 from the outer periphery of the flange portion 110 through the notch groove 144.

  Furthermore, in any of the above-described embodiments, it is preferable that the winding lead portion 140 is disposed on the radially inner side (rotary shaft side) than the support groove 171. That is, since the winding lead portion 140 is disposed inside the support groove 171, the winding 24 drawn from the winding lead portion 140 and the winding supported by the support groove 171 do not come into contact with each other. Therefore, the winding 24 can be routed more easily.

  Next, on one flange part 110 (FIG. 4 (a) front side in FIG. 4), a crossover processing part 170 for routing the coil 24 drawn out from the bobbin for each of the U phase, V phase and W phase. Is provided.

  Referring to FIG. 2, the crossover processing unit 170 is integrally projected outward from the axial side surface of the flange unit 110, and on the upper surface (the upper end surface in FIG. 4A). In this example, three support grooves 171 for passing the coil 24 are provided at predetermined intervals.

  As shown in FIG. 2, the support groove 171 is formed along both ends in the circumferential direction of the crossover processing unit 170, and the crossover line 24 for each phase is wired along the support groove 171. In this example, three support grooves 171 are provided, but the number of support grooves 171 can be arbitrarily changed according to specifications.

The crossover processing unit 170 further includes a crossover processing unit 17.
A terminal holding hole 172 is provided in order to concurrently use 0 as a terminal block of the winding 2. The terminal holding hole 172 is formed of a slit hole provided on the side surface in the axial direction of the crossover processing section 172, and a terminal plate 190 (current supply section) that supplies current to the winding to the terminal holding hole 172 (see FIG. 10). ) Is inserted to form the terminal portion.

  On the other flange portion 110 (the front side in FIG. 4B), a notch portion 143 is formed as a winding lead portion 140 for pulling out the other end portion of the connecting wire 24 toward the flange portion 110 side. . The notch 143 is notched in a semicircular shape from the outer peripheral surface in the radial direction of the flange 110 toward the inside, and the other end of the winding 24 wound around the bobbin is drawn out from here.

  A neutral point connection portion 180 is provided for connecting the connecting wire 24 at each point for a neutral point. The neutral point connecting portion 180 includes a clip holding portion 181 formed on the side surface in the axial direction of the flange portion 110, and a metal clip 182 (see FIG. 11) locked to the clip holding portion 181.

  The clip holding part 181 is formed of a quadrangular frame projecting on the side surface of the flange part 110, and is recessed at the center part for locking the metal clip 182. The metal clip 182 is formed by bending a conductive metal piece having elasticity into a U-shape, and the neutral point is connected by sandwiching the winding 24 between the metal pieces (see FIG. 11).

  According to this, by connecting the neutral point via the metal clip 110, the metal clip can be easily connected only by joining the metal clip by soldering or welding. In this example, the neutral point connecting portion 180 is formed by locking the metal clip 182 to the clip holding portion 181, but the metal clip 182 may be attached integrally in advance. Thus, since the neutral point is connected on the metal clip, not only can the crossover before joining be held, but also the insulator will not be adversely affected by heat at the time of joining.

  Next, an example of the procedure for connecting the core members 21a to 21i will be described with reference to FIGS. First, the coil | winding 24 is wound around the bobbin of each core member 21a-21i.

  As shown in FIG. 14, each flange part 110 of the core member 21a is attached to the tip of a pair of jigs 200, 200 connected to a driving means (not shown). Next, after the coil 24 drawn out from the needle 210 is held along the bobbin and hooked on the notch 143 of the flange portion 110, the tip is wound around the locking portion 201 of the jig 200.

  In this state, the coil 24 is wound around the bobbin of the core member 21a by rotating the jig 200 via the driving means. After winding the required number of turns, the coil 24 is cut off, so that the core member 21a is filled with the coil 24. A series of winding operations are repeated, and the coil 24 is wound around each of the core members 21a to 21i.

  Next, as shown in FIG. 9A, the hook groove 121 of the hook portion 120 of the core member 21a is hooked on the locking shaft 130 of the adjacent core member 21b. As shown in FIG. 9B, the core member 21 b is rotated around the locking shaft 330 toward the core member 21 a while the hook portion 120 is hooked on the locking shaft 130. As a result, the tip of the hook portion 320 rotates around the locking shaft 130.

  When the core member 21b is further rotated toward the core member 12a, the locking recess 162 of the core member 21b is inserted toward the locking projection 161 of the core member 21a, so that the core member 21a, the core member 21b, Are connected to each other.

  At this time, a part of the winding 24 is hooked on the notch 141 of the hook 120. As a result, the core member 21b is attached, and at the same time, the winding 24 is fixed in a state of being pulled out from between the notches 141 and 142.

  The above series of operations is repeated for each core member 21a to 21i. Finally, the end of the core member 21a and the end of the core member 21i are connected. First, the tip of the hook portion 120 of the core member 21i is brought into contact with the locking shaft 130 of the core member 21a.

  When the hook 120 is pushed toward the locking shaft 130 with the hook 120 in contact, the hook 120 is pushed below the locking shaft 130 along the first guide surface 122. The portion 120 is sandwiched and fixed between the locking shaft 130 and the guide portion 150. The core members 21a to 21i are assembled in an annular shape by the series of operations described above. In this example, the hook portion 120 is rotated around the locking shaft 130, but the hook portion 130 may be directly fitted to the locking shaft 130.

  After being connected in a ring shape, the windings 24 drawn from the winding lead portions 140 of the core members 21a to 21i are wired along the crossover processing portion 170 of the flange portion 110. The winding 24 is wired along the support groove 171 of the crossover processing unit 170 for each of the U phase, the V phase, and the W phase.

  Referring to FIG. 10, first, when processing the crossover 24, the terminal plate 190 is inserted into the terminal holding portion 172 of the winding processing portion 170 of the core members 21a, 21b, 21c. In this example, the terminal plate 190U of the core member 21a is a U phase, the terminal plate 190V of the core member 21b is a V phase, and the terminal plate 190W of the core member 21c is a W phase terminal.

  As shown in FIG. 10, of the U-phase core members 21 a, 21 d, and 21 g, the winding 24 drawn out from the core member 21 d passes through the support groove 171 formed in the middle of the crossover processing section 170. After being routed clockwise and carried to the core member 21a, it is connected to the terminal board 190U.

  Conversely, the winding 24 drawn from the core member 21g is routed clockwise through the support groove 171 on the outer side of the crossover processing section 170 and is carried to the core member 21a, and then connected to the terminal plate 190U. The

  Similarly, the V-phase and the W-phase are wired in the support groove 171 so that the different-phase windings 24 do not contact each other, and finally connected to the terminal plates 190V and 190W. Thereby, as shown in FIG. 10, the coil | winding 24 is connected to each terminal board 190 for every phase.

  In this example, each of the core members 21a to 21i has a U phase (21a) → V phase (21b) → W phase (21c) → U phase (21d) → V phase (21e) → W phase (21f) → U phase. (21g) → V phase (21h) → W phase (21i) has been exemplified in the arrangement, but U phase (21a) → U phase (21b) → U phase (21c) → V phase (21d The same applies to the arrangement in the order of) → V phase (21e) → V phase (21f) → W phase (21g) → W phase (21h) → W phase (21i).

  Next, a method for connecting the windings 24 will be described. As shown in FIG. 15, one end of the winding 24 drawn to the flange 110 side in FIG. 4A is wound around each phase of the U phase, the V phase, and the W phase via each crossover processing section 170. The in-phase wires 24 are connected to the terminal boards 190U, 190V, 190W.

  The other end of the winding 24 drawn out to the flange 110 side in FIG. 4B is connected to the adjacent U-phase, V-phase, and W-phase in different phases, and the connection portion constitutes a neutral point. It is supposed to be. That is, as shown in FIG. 11, when connecting the neutral point, it is possible to simply hold the end of each winding 24 between the metal clips 182 provided on the core member 21b. . The neutral point can be easily connected via the metal clip 110 by soldering or welding.

  Next, another embodiment of the insulators of the core members 21a to 21i will be described with reference to FIGS. 12 (a) to 12 (f) and FIG. In addition, since the core members 21a to 21i according to the other embodiment have substantially the same configuration as the above-described embodiment, the same or similar parts are denoted by the same reference numerals, and the description thereof is omitted. To do.

  As a first feature of this embodiment, the first and second crossover processing sections 210 and 220 are independently provided on the flange sections 110 and 110 of the insulator 100. The first crossover processing section 210 of one flange section 110 (the front side of FIG. 12A) is formed in an arch shape along the circumferential direction, and the winding 24 is formed on the upper surface in the radial direction. A plurality of support grooves 211 to be delivered are provided at predetermined intervals, in this example, three places.

  As shown in FIGS. 12A and 12E, in this example, the first crossover processing section 120 includes an introduction section 212 for guiding each winding 24 into the support groove 211. The introduction part 212 is an extension part of the support groove 211 formed on both end faces in the circumferential direction of the first crossover processing part 120, and the crossover line 24 is wired to the support groove 211 through the introduction part 212. The winding 24 coming out of the bobbin can be smoothly passed without contacting.

  On the other flange portion 110 (the front side in FIG. 12B), a second crossover processing unit 220 for processing the crossover wire 24 for neutral point connection is provided. The second crossover processing section 220 is formed on the outer peripheral side in the radial direction of the flange section 110 and includes two support grooves 221 in which the crossover 24 is guided.

  A pair of guide ribs 231 and 232 are further provided on the axial side surface of the flange portion 110 at different positions in the radial direction and the circumferential direction. The first guide rib 231 is formed closer to the outer peripheral side in the radial direction of the flange portion 110 and extends from the end in the circumferential direction toward the center. The other second guide rib 232 is formed radially inward of the first guide rib 231 and is formed closer to the center in the circumferential direction.

  According to this, as shown in FIG. 13, the movement of the connecting wire 24 in the radial direction is restricted by being passed so that the connecting wire 24 is sandwiched in the gap 234 formed between the guide ribs 231 and 232. In addition, the movement of the connecting wire in the axial direction can be restricted by the support groove 221 provided in the second connecting wire holding portion 220. Therefore, the winding 24 can be prevented from moving when integrally molded with resin. In the present embodiment, there are three different-phase connecting wires for constituting the neutral point, ie, the U-phase, V-phase, and W-phase, but the second connecting wire holding portion 220 has two support grooves. In this support groove, the connecting wire drawn from the core members 21a and 21b is held, and the connecting wire drawn from the core member 21c is held by the winding drawing portion of the core member 21c.

  The connecting wires drawn from the core members 21a, 21b, and 21c are twisted so as to be entangled and temporarily fixed. The twisted portion 25 is passed so as to be sandwiched between gaps formed between the first and second guide ribs provided in the flange portion of 21d, and joined by soldering or welding so as to connect neutral points.

The principal part sectional view of the axial air gap type electric motor concerning the embodiment of the present invention. The perspective view of the state which connected the stator core of the axial air gap type motor. The perspective view of a stator core single-piece | unit. (A) Front view, (b) Rear view, (c) Plan view, (d) Bottom view, (e) Left side view, and (f) Right side view of the core member. The front view of the state which connected the stator core. The front view which shows the modification of a coil | winding extraction part. (A) The perspective view which shows the modification of a coil | winding extraction part, (b) The perspective view of the state which pulled out the coil | winding from the coil | winding extraction part. The partial exploded perspective view which shows a neutral point connection part. (A), (b) Explanatory drawing explaining the connection procedure of a stator core. The perspective view of the state which gave the connecting wire to each stator core. The perspective view of the state which gave the crossover of the neutral point connection to each stator core. (A) Front view, (b) Rear view, (c) Top view, (d) Bottom view, (e) Left side view, and (f) Right side view of a core member according to another embodiment of the present invention. The schematic diagram which shows the state which wired the crossover between the guide ribs. Explanatory drawing explaining the procedure which winds a coil | winding to a stator core. The schematic diagram which shows the connection state of a coil | winding.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Axial air gap type electric motor 2 Stator 3 Rotor 4 Rotor output shaft 21a to 21i Core member 22 Teeth surface 100 Insulator 110 Flange portion 120 Hook portion 130 Locking shaft 140 Winding lead portion 141, 142, 143 Notch portion 144 Notch groove 150 Guide part 161 Locking convex part 162, Locking concave part 170 Crossover processing part 171 Support groove 180 Neutral point connection part 181 Clip holding part 182 Metal clip 190 Terminal plate (current supply part)

Claims (7)

The stator and the rotor are arranged to face each other with a predetermined gap along the axial direction of the rotor output shaft of the rotor, and the stator includes a plurality of core members arranged in an annular shape around the axis of the rotor output shaft. In the axial air gap type electric motor in which the core members are connected to each other via a predetermined connecting means,
An axial air gap type characterized in that the stator has a crossover processing part on one side surface and a neutral point connection part for connecting the crossovers of windings to different phases on the other side surface. Electric motor. The stator and the rotor are arranged to face each other with a predetermined gap along the axial direction of the rotor output shaft of the rotor, and the stator includes a plurality of core members arranged in an annular shape around the axis of the rotor output shaft. In the axial air gap type electric motor in which the core members are connected to each other via a predetermined connecting means,
Each core member is formed in a bobbin shape having a stator core and an insulator that insulates a winding portion of the stator core, and the insulator extends along a tooth surface of the stator core. A current is supplied to each phase of the winding on one axial outer surface of the flange portion of at least one core member of the core members having a pair of parallel flange portions and constituting the stator. For providing a current supply section for connecting the crossover wires of the windings to each other on the other outer surface in the axial direction of the flange portion of at least one of the core members constituting the stator. An axial air gap type electric motor characterized in that a point connection portion can be provided. 3. The axial air gap type electric motor according to claim 1, wherein the flange portion is provided with a winding lead portion for pulling out the connecting wire of the winding to the outer periphery in the axial direction. The axial air gap type electric motor according to claim 3, wherein the flange portion is provided with a plurality of winding lead portions. The neutral point connecting portion includes a metal clip that sandwiches the connecting wire in an electrically conductive state, and the flange portion includes a holding portion that holds the metal clip. Item 5. The axial air gap motor according to any one of Items 1 to 4. The pair of guide ribs are provided at different positions in the radial direction on the side surface in the axial direction of the flange portion, and a crossover is passed through a gap formed between the guide ribs. The axial air gap type electric motor according to any one of 5 to 5. Crossover wires having different phases for constituting the neutral point are respectively drawn out from the winding lead-out portion in the same circumferential direction, are passed through gaps formed between the guide ribs, and are not related to the connecting wire. The axial air gap type electric motor according to claim 6, wherein a neutral point connecting portion is provided on a core member around which the wire is wound.