JP5300542B2 - Axial gap motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an axial gap motor of simple structure with the less number of components, with good assemblability of stator unit. <P>SOLUTION: The axial gap motor includes a yoke with a plurality of rectangular cuts having an opening on the outside in the radial direction, being formed in circle, and a protrusion which is formed in the opening to narrow the opening width of the opening. It also includes a stator with a fitting part provided with a groove for internal fitting with the side edge of the cut of the yoke and teeth which protrude from the fitting part and are wound with a coil, having a plurality of teeth cores which are fitted with the cut and prevented from coming off by the protrusion. It further includes a rotor which is formed in circle and is supported on a rotating shaft, being arranged to face the end of the teeth at intervals in the axial direction. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an axial gap motor.

  Conventionally, in the axial gap motor in which the tooth portion gap surface of the stator and the magnet surface of the rotor are arranged to face each other with a predetermined gap along the axial direction of the rotor output shaft of the rotor, the stator includes the rotor A plurality of core members arranged annularly around the axis of the output shaft, and a ring-shaped support frame that supports each of the core members, the core members extending along an inner peripheral surface of the support frame An axial gap motor that is arranged in an annular shape and is supported by the support frame via a fixture (bolt, nut) is disclosed (for example, see Patent Document 1).

  Also, a disc-shaped yoke including a plurality of notches having openings radially outward, and a teascore that is inserted from the radially outer side of the yoke and fixed to the notches, and is fixed to the casing An axial gap motor is disclosed that includes a stator that is fixedly connected to a rotating member and a rotor that is disposed at a position facing the stator with an axial gap therebetween (see, for example, Patent Document 2).

JP 2006-296140 A JP 2007-237976 A

  However, according to the conventional technique described in Patent Document 1, each core member is annularly arranged along the inner peripheral surface of the support frame, and is supported by the support frame via a fixture (bolt, nut). Is done. Therefore, there is a problem that the number of parts such as fixtures (bolts and nuts) is large.

  Further, according to the conventional technique described in Patent Document 2, the tee score is inserted and fitted into a plurality of notches having openings on the outer side in the radial direction of the disk-shaped yoke, and is fitted into the recess of the casing. It keeps the tea score from falling. Therefore, the assemblability as a single stator is poor, and in the state of a single stator, the tee score falls off the yoke. Therefore, there exists a problem that the assembly property of a stator single item is bad.

  The present invention has been made in view of the above, and an object of the present invention is to obtain an axial gap motor that has a simple structure with a small number of parts and that is easy to assemble a single stator.

In order to solve the above-described problems and achieve the object, the present invention provides a plurality of rectangular notches that are formed in a disc shape and have openings radially outward, and the openings formed in the openings. A yoke having a projecting portion that narrows the opening width of the portion, a fitting portion provided with a groove for fitting a side edge portion of the notch portion of the yoke, and a coil protruding from the fitting portion and wound by the coil A stator having a plurality of teascores fitted into the notches and secured by the protrusions, and formed in a disc shape and supported by a rotating shaft. A rotor disposed so as to be opposed to the end of the tooth portion with a gap in the axial direction, and at least one of the convex portions between adjacent notches of the yoke has a radial direction A slit that opens to the outside is provided .

  According to the present invention, it is possible to obtain an axial gap motor that has a simple structure with a small number of parts and that is easy to assemble a single stator.

FIG. 1-1 is a front view illustrating a stator according to a first embodiment of an axial gap motor of the present invention. 1-2 is a top view of the stator of the first embodiment. FIG. 1-3 is sectional drawing which shows Embodiment 1 of the axial gap motor of this invention. FIGS. 2-1 is a front view which shows the stator of Embodiment 2 of the axial gap motor of this invention. FIGS. FIG. 2B is a cross-sectional view taken along line AA in FIG. FIG. 2-3 is a perspective view illustrating a method of assembling the stator according to the second embodiment. FIG. 3-1 is a front view showing a stator of Embodiment 3 of the axial gap motor of the present invention. 3-2 is a cross-sectional view taken along line BB in FIG. 3-1. FIG. 3-3 is a perspective view illustrating a method of assembling the stator according to the third embodiment. FIGS. 4-1 is a front view which shows the stator of Embodiment 4 of the axial gap motor of this invention. FIGS. FIG. 4B is a cross-sectional view taken along line CC in FIG. FIG. 5 is a cross-sectional view showing the stator of the fifth embodiment.

  Embodiments of an axial gap motor according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
1-1 is a front view showing a stator according to a first embodiment of an axial gap motor of the present invention, FIG. 1-2 is a top view of the stator according to the first embodiment, and FIG. It is sectional drawing which shows Embodiment 1 of the axial gap motor of this invention.

  As shown in FIGS. 1-1 and 1-2, the stator 81 of the axial gap motor 91 (see FIG. 1-3) of the first embodiment is formed in a disk shape, and has an opening 11b radially outward. And a yoke 11 having a plurality (12) of rectangular notches 11a arranged at equal intervals in the circumferential direction and a protrusion 11c formed in the opening 11b and narrowing the opening width of the opening 11b. ing.

  A slit 11s that opens to the outside in the radial direction is provided at least at one location between adjacent notches 11a of the yoke 11.

  Further, the stator 81 protrudes on both sides of the fitting portion 12a provided with a groove 12c in which the side edge portion 11d of the notch portion 11a of the yoke 11 is fitted, and the coil 13 is wound around the fitting portion 12a. And a plurality of teascores 12 that are fitted into the notches 11a of the yoke 11 and are retained by the projections 11c. The stator 81 is resin-molded after the yoke 11 and the tee score 12 are assembled to enhance stability and durability.

  When inserting a plurality of tee scores 12 into the plurality of notches 11a of the yoke 11, first, the first tee score 12 is inserted into any one of the notches 11a. When the tee score 12 passes through the protruding portion 11c, the protruding portion 11c is expanded, and the convex portion between the notches 11a is elastically deformed to insert the tee score 12.

  The second tee score 12 is inserted into the notch portion 11a adjacent to the notch portion 11a into which the first tee score 12 is inserted (which may be either clockwise or counterclockwise). When the second tee score 12 passes through the protrusion 11c, the protrusion 11c is expanded, and the convex portion on the opposite side to the notch 11a side where the first tee score 12 is inserted is elastically deformed. A th tee score 12 is inserted.

  In this way, the tea score 12 is inserted into the adjacent notch 11a in order, and the last tea score 12 is inserted into the notch 11a adjacent to the slit 11s. When the slit 11s is not provided, the tea score 12 is clogged in the notches 11a adjacent to the last notch 11a into which the last tee score 12 is inserted, and the protrusion 11c of the last notch 11a. However, if the slit 11s is provided, the convex portion can be elastically deformed to spread the protrusion 11c.

  As shown in FIG. 1A, the axial gap motor 91 according to the first embodiment includes the above-described stator 81, the housing 16 that holds the outer periphery of the stator 81, and a disk shape that is supported by the rotating shaft 17. And two rotors 18 arranged so as to face the end of the tooth portion 12b with an axial gap therebetween. A plurality of permanent magnets 18 a that receive a rotational driving force from the stator 81 are disposed on the surface of the rotor 18 that faces the end of the tooth portion 12 b.

  In the axial gap motor 91 according to the first embodiment described above, the teeth portion 12b and the coil 13 of the tee score 12 are provided only on one side, and one rotor 18 is disposed at the center in the axial direction of the housing 16. The two stators 81 provided with the teeth portion 12b and the coil 13 may be arranged only on one side so as to sandwich the rotor 18 from both sides, and a one-side type axial gap motor may be used.

  In the axial gap motor 91 of the first embodiment, since the protrusion 11c is provided in the notch 11a of the yoke 11, the tee score 12 does not fall out of the notch 11a, and the assembly of the single stator 81 is good. Further, the assemblability can be further improved by providing the yoke 11 with the slit 11s.

Embodiment 2. FIG.
2-1 is a front view showing a stator of Embodiment 2 of the axial gap motor of the present invention, FIG. 2-2 is a cross-sectional view taken along the line AA of FIG. 2-1, and FIG. -3 is a perspective view illustrating a method of assembling the stator of the second embodiment.

  As shown in FIGS. 2-1 to 2-3, the stator 82 of the axial gap motor (not shown) of the second embodiment is formed in a disk shape and has an opening 21b on the radially outer side. A yoke 21 having a plurality of (12) rectangular notches 21a arranged at equal intervals in the circumferential direction and a projection 21c formed in the opening 21b and narrowing the opening width of the opening 21b is provided. The depth of the notch 21a is approximately ½ of the depth of the notch 11a (see FIG. 1-1) of the first embodiment.

  A slit 21 s that opens to the outside in the radial direction is provided in at least one portion of the convex portion between the adjacent notch portions 21 a of the yoke 21.

  The stator 82 includes a fitting portion 22a provided with a groove 22c for fitting the side edge portion 21d of the notch portion 21a of the yoke 21, and a tooth around which the coil 13 is wound so as to protrude to one side of the fitting portion 22a. And a plurality of tea scores 22 that are fitted into the notches 21a of the yoke 21 and are prevented from being removed by the protrusions 21c. The length of the fitting portion 22a of the tea score 22 is formed to be approximately ½ of the length of the teeth portion 22b.

  The order in which the plurality of tea scores 22 are inserted into the plurality of notches 21a of the yoke 21 is the same as the order described in the first embodiment. The stator 82 is resin-molded after assembling the yoke 21 and the tee score 22 to enhance stability and durability.

  In the axial gap motor according to the second embodiment described above, the tooth portion 22b of the tea score 22 and the coil 13 are provided only on one side, and one rotor 18 (see FIG. 1C) is disposed at the center in the axial direction of the housing 16. Then, the two stators 82 provided with the teeth 22b and the coil 13 are arranged only on one side so as to sandwich the single rotor 18 from both sides, thereby forming a one-side type axial gap motor.

  In the axial gap motor of the second embodiment, since the protrusion 21c is provided in the notch 21a of the yoke 21, the tee score 22 does not fall out of the notch 21a, and the assembly of the stator 82 alone is good. Further, by providing the yoke 21 with the slit 21s, the assemblability can be further improved.

Embodiment 3 FIG.
3-1 is a front view showing a stator according to Embodiment 3 of the axial gap motor of the present invention, and FIG. 3-2 is a cross-sectional view taken along line BB in FIG. 3-1. -3 is a perspective view illustrating a method of assembling the stator of the third embodiment.

  As shown in FIGS. 3A and 3B, the stator 83 of the axial gap motor 93 according to the third embodiment (see FIGS. 1-3) is formed in a disk shape, and has an opening 11b radially outward. And a yoke 11 having a plurality (12) of rectangular notches 11a arranged at equal intervals in the circumferential direction and a protrusion 11c formed in the opening 11b and narrowing the opening width of the opening 11b. ing.

  A slit 11 s that opens outward in the radial direction is provided in at least one portion of the convex portion between the adjacent notch portions 11 a of the yoke 11. The yoke 11 of the third embodiment has the same shape as the yoke 11 of the first embodiment.

  The stator 83 includes a fitting portion 22a provided with a groove 22c for fitting the side edge portion 11d of the notch portion 11a of the yoke 11, and a tooth around which the coil 23 is wound by projecting to one side of the fitting portion 22a. And a plurality of tea scores 22 that are fitted into the notches 11a of the yoke 11 and are retained by the projections 11c. The length of the fitting portion 22a of the tea score 22 is formed to be approximately ½ of the length of the teeth portion 22b. The tea score 22 of the third embodiment has the same shape as the tea score 22 of the second embodiment.

  As shown in FIG. 3C, in the stator 83 of the third embodiment, the two tee scores 22 formed so that the length of the fitting portion 22a is approximately ½ of the length of the teeth portion 22b are alternately assembled. In addition, the teeth portion 22b is formed as one tee score 22 protruding on both sides of the fitting portion 22a, and is inserted into the notch portion 11a of the yoke 11. The tea score 22 of the third embodiment can be shared with the tea score 22 of the second embodiment.

  The order in which the plurality of tea scores 22 are inserted into the plurality of notches 11a of the yoke 11 is the same as the order described in the first embodiment. The stator 83 is resin-molded after assembling the yoke 11 and the tee score 22 to enhance stability and durability.

  As shown in FIG. 1A, the axial gap motor 93 according to the third embodiment includes the above-described stator 83, the housing 16 that holds the outer periphery of the stator 83, and a disk shape that is supported by the rotating shaft 17. And two rotors 18 arranged so as to face the end of the tooth portion 22b with a gap in the axial direction therebetween. A plurality of permanent magnets 18 a that receive rotational driving force from the stator 83 are disposed on the surface of the rotor 18 that faces the end of the tooth portion 22 b.

  In the axial gap motor 93 of the third embodiment, since the protrusion 11c is provided in the notch 11a of the yoke 11, the tee score 22 does not fall out of the notch 11a, and the assembly of the single stator 83 is good. Further, the assemblability can be further improved by providing the yoke 11 with the slit 11s.

Embodiment 4 FIG.
FIG. 4-1 is a front view showing a stator of Embodiment 4 of the axial gap motor of the present invention, and FIG. 4-2 is a cross-sectional view taken along the line CC of FIG. 4-1.

  As shown in FIGS. 4A and 4B, the stator 84 of the axial gap motor according to the fourth embodiment is formed in a disk shape, and a plurality of a pair of holes 41a spaced apart by a predetermined distance in the radial direction are provided in the circumferential direction. A pair of yokes 41 is provided.

  The stator 84 includes a mounting portion 42a provided with a protrusion 42d and a hole 42c that are spaced apart from each other by the predetermined distance, and a teeth portion 42b that protrudes to one side of the mounting portion 42a and on which the coil 13 is wound. The protrusion 41d is inserted into one hole 41a of the pair of holes 41a of the yoke 41, and a plurality of tee scores 42 attached to one surface of the yoke 41 so that the hole 42c overlaps the other hole 41a. I have. The fitting size of the hole 41a and the protruding portion 42d is an intermediate fit or an interference fit so that the protruding portion 42d inserted into the hole 41a does not easily fall off. The stator 84 is resin-molded after the assembly of the yoke 41 and the tee score 42 to enhance stability and durability.

  In the axial gap motor according to the fourth embodiment described above, the tee score 42 is attached only to one surface of the yoke 41, and one rotor 18 (see FIG. 1C) is disposed in the axially central portion of the housing 16, The two stators 84 provided with the tee score 42 and the coil 13 are disposed only on one side so as to sandwich the single rotor 18 from both sides, thereby forming a one-side axial gap motor.

  In the axial gap motor according to the fourth embodiment, since the fitting dimension of the hole 41a and the protrusion 42d is an intermediate fit or an interference fit, the tee score 42 is difficult to come off from the yoke 41, and the assembly of the stator 84 alone is good. .

Embodiment 5 FIG.
FIG. 5 is a cross-sectional view showing the stator of the fifth embodiment. As shown in FIG. 5, the stator 85 according to the fifth embodiment has another tee having the same shape as the tee score 42 from the other surface side of the yoke 41 to the other hole 41 a of the yoke 41 and the overlapped hole 42 c. The protrusion 42d of the score 42 is inserted, and the protrusion 42d of the tee score 42 protruding from one hole 41a of the yoke 41 is fitted into the hole 42c of another tee score 42, so that the tee score is formed on both sides of the yoke 41. 42 is attached.

  The tea score 42 of the fifth embodiment can be shared with the tea score 42 of the fourth embodiment. The stator 85 is resin-molded after the assembly of the yoke 41 and the tee score 42 to enhance stability and durability.

  As shown in FIG. 1-3, the axial gap motor 95 according to the fifth embodiment includes the above-described stator 85, the housing 16 that holds the outer periphery of the stator 85, and a disk shape that is supported by the rotating shaft 17. And two rotors 18 arranged so as to face the end of the tooth portion 42b with a gap in the axial direction therebetween. A plurality of permanent magnets 18 a that receive a rotational driving force from the stator 85 are disposed on the surface of the rotor 18 that faces the end of the tooth portion 42 b.

  In the axial gap motor 95 of the fifth embodiment, since the fitting dimension of the hole 41a and the protrusion 42d is an intermediate fit or an interference fit, the tee score 42 is difficult to come off from the yoke 41, and the assembly of the single stator 85 is easy. Good.

  As described above, the axial gap motor according to the present invention is useful as an axial gap motor with a simple structure and good assemblability.

11, 21, 41 Yoke 11a, 21a Notch 11b, 21b Opening 11c, 21c Protrusion 11d, 21d Side edge 12, 22, 42 Teescore 12a, 22a Fitting 12b, 22b, 42b Teeth 12c, 22c Groove 13 Coil 16 Housing 17 Rotating shaft 18 Rotor 18a Permanent magnet 81, 82, 83, 84, 85 Stator 91, 93, 95 Axial gap motor

Claims (5)

A yoke having a plurality of rectangular notches formed in a disc shape and having openings on the radially outer side, and a protrusion formed in the opening and narrowing the opening width of the opening;
A fitting portion provided with a groove for fitting a side edge portion of the notch portion of the yoke; and a teeth portion protruding from the fitting portion and wound with a coil, and fitted into the notch portion. A plurality of teascores combined and secured by the protrusions;
A stator comprising:
A rotor formed in a disk shape and supported by a rotating shaft, and arranged to face the end of the tooth portion with a gap in the axial direction;
Equipped with a,
An axial gap motor, wherein a slit that opens radially outward is provided in at least one portion of a convex portion between adjacent notch portions of the yoke .   The axial portion according to claim 1, wherein teeth portions around which the coils are wound are provided on both sides of the fitting portion, and the rotor is disposed on both sides of the stator so as to sandwich the stator. Gap motor.   The length of the fitting portion of the tea score is formed to be approximately ½ of the length of the teeth portion, and the depth of the notch portion of the yoke is approximately ½ of the length of the teeth portion. The axial gap motor according to claim 1, wherein the axial gap motor is formed. Combining two tea scores formed with the length of the fitting portion being approximately ½ of the length of the teeth portion, the teeth portion is one tea score protruding on both sides of the fitting portion. The axial gap motor according to claim 2 . A yoke having a pair of holes formed in a disc shape and spaced apart by a predetermined distance in the radial direction in the circumferential direction;
A mounting portion provided with a protrusion and a hole spaced apart from each other by a predetermined distance; and a teeth portion that protrudes from the mounting portion and is wound with a coil. A plurality of tee scores attached to one surface of the yoke such that the protrusion is inserted and the hole is overlapped with the other hole;
A stator comprising:
A rotor formed in a disk shape and supported by a rotating shaft, and arranged to face the stator with an axial gap therebetween;
Equipped with a,
From the other surface side of the yoke, the other hole of the yoke and the overlapped hole are inserted with a protrusion of another tee score having the same shape as the tee score, and protruded from one hole of the yoke. The tee score is fitted to both sides of the yoke so that the protrusion of the tee score is fitted into the hole of the other tee score, and the rotor is disposed on both sides of the stator so as to sandwich the stator. Axial gap motor characterized by that.

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