JP6462714B2 - Axial gap type rotating electrical machine and insulating member - Google Patents

Description

Import by reference

  This application claims the priority of Japanese Patent Application No. 2014-224849 filed on November 5, 2014, and is incorporated herein by reference.

  The present invention relates to an axial gap type rotating electrical machine and an insulating member, and more particularly to an axial gap type rotating electrical machine and an insulating member that insulate a stator core.

Amidst the progress of electrification in various fields including energy saving and transportation equipment field, it is an urgent task to reduce the size and increase the efficiency of rotating electric machines (for example, motors). In general, small size and high efficiency are contradictory elements, and in recent years, there is an increasing need for the compatibility. Against this background, attention is increasing to an axial gap type rotating electrical machine that is small and space-saving and can be expected to have high output.
An axial gap type rotating electrical machine has a characteristic that a torque is easily generated as the radial cross section has a wider magnetic flux area. From this, flattening in the axial direction can be expected. Axial gap type rotating electrical machines can realize various combinations such as “one stator and one rotor”, “one stator and two rotors”, and “two stators and one rotor”. There is a feature that it is easy to meet the demands.

  Patent Document 1 discloses an axial gap motor having an armature structure in which one stator is sandwiched between two rotors. The motor disclosed in Patent Document 1 has a stator structure in which divided core members are arranged in an annular shape around a rotating shaft. In such a case, the configuration and materials of each divided core are various combinations. In patent document 1, the structure which makes the iron core of each division | segmentation core member a wound core, or obtains the annular body which rolled the thin plate for cores, and obtains each iron core by cut | disconnecting this at an equal angle from the end surface side. Disclose. Moreover, patent document 1 also discloses using an amorphous metal for the material of the thin plate for cores.

Patent Document 2 discloses an axial gap type rotating electrical machine having an iron core of a divided core member in which one or a plurality of rectangular steel plates cut to a predetermined width are radially or stacked from a rotating shaft.
In order to fix the laminated or wound iron core, the fixing jig is required. Furthermore, if electrical insulation is considered between the coil and the iron core, an insulating material such as insulating paper or a bobbin may be required. Patent Document 2 discloses a configuration in which insulating paper or a resin material is provided on the outer periphery of the iron core, and the iron core is inserted into a cylindrical resin material and the insertion is facilitated.

  Further, Patent Document 3 is an insulator that is provided with an insulator by performing resin insert molding on a laminated core installed in a mold in order to apply an insulating material to the outer peripheral side of the laminated iron core, or is an insulator that is divided in the rotation axis direction. A configuration in which a laminated iron core is sandwiched from both sides in the rotational direction is disclosed.

JP 2009-284578 A JP2013-121226A JP 2011-193564 A

  In the axial gap type rotating electrical machine, as described in Patent Documents 1 and 2, the configuration in which thin plates using amorphous metal are laminated in the circumferential direction or the radial direction reduces eddy current loss generated in the stator core and is highly efficient. There is an advantage that it can be a motor.

  In such an iron core structure, when applying an insulating material to the outer periphery of the iron core, in the resin insulator forming disclosed in Patent Document 3, the laminated steel plate is fixed in advance by bonding or the like and then set in a mold, Various configurations and processes for fixing and positioning the laminated iron core in the mold are required.

  In order to omit such a configuration and process, there is a method in which a laminated iron core is inserted into a cylindrical insulating member. In this case, it is necessary to pre-fix the laminated iron core with an adhesive or the like, or insert it while pressing the iron core in the laminating direction with a jig, but the space factor may vary due to variations in the laminated thin plates, etc. Further, there is a possibility that it becomes difficult to insert into the insulating member due to deformation, or the iron core comes out after insertion.

The difficulty of inserting the iron core and the risk of disconnection are not limited to the laminated iron core, but are also common to configurations in which a solid iron core obtained by compaction, cutting, etc. is inserted into an insulating material with a predetermined shape. is there. Furthermore, there may be a problem due to individual differences in the solid insulating member itself having a predetermined shape.
It is desired to eliminate the performance degradation caused by individual differences of members such as iron cores and insulating members and to improve the convenience of manufacturing.

  In order to solve the above problems, for example, the configuration described in the claims is applied. That is, an iron core composed of a substantially columnar body having a radial cross-sectional shape in which the rotational direction width increases from the axial center side toward the outer peripheral side, and an insulating member having an inner cylinder shape substantially the same as the outer peripheral shape of the iron core; A stator having a core member formed of a coil wound around the outer cylindrical portion of the insulating member, and a plurality of the core members arranged in an annular shape around a rotation axis; and at least one end face of the stator core; An axial gap type rotating electrical machine having at least one rotor facing the surface via a gap in the rotation axis direction, wherein the insulating member is in contact with an outer peripheral surface on the side where the width in the rotation direction is large. An insulating member; and a second insulating member that contacts an outer peripheral portion of the iron core excluding an outer peripheral surface with which the first insulating member contacts, both radial ends of the second insulating member, and the first insulating member Both ends of member rotation direction DOO in which is in contact.

  According to the present invention, the insulating member can be easily installed on the outer periphery of the iron core. Other problems, configurations, and effects of the present invention will become apparent from the following description.

1 is an exploded perspective view showing a schematic configuration of an axial gap type motor according to an embodiment to which the present invention is applied. 1 is a partial cross-sectional view of an axial gap type motor according to an embodiment to which the present invention is applied. It is a schematic diagram which shows the structure of the insulator by 1st Embodiment. It is a schematic diagram which shows the assembly of the insulator by 1st Embodiment. It is a schematic diagram which shows the structure of the insulator by the modification of 1st Embodiment. It is a schematic diagram which shows the structure of the insulator by 2nd Embodiment. It is a schematic diagram which shows the structure of the insulator by 3rd Embodiment. It is a schematic diagram which shows the structure of the insulator by 4th Embodiment. It is a schematic diagram which shows the structure of the insulator by 5th Embodiment. It is a schematic diagram which shows the structure of the insulator by 6th Embodiment.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.
[First Embodiment]
FIG. 1 schematically shows an armature configuration of an axial gap motor (hereinafter referred to as “motor 1”) according to a first embodiment to which the present invention is applied.
The motor 1 has a “1 stator / 2 rotor” structure including a stator 2 and rotors 3 a, 3 b, and has a configuration in which the rotors 3 a, 3 b are sandwiched from a rotating shaft (not shown) with a predetermined gap. The present invention is not limited to this structure, and the number of stators and rotors is arbitrary.

  The stator 2 has a configuration in which a plurality (9 in the figure) of divided core members are arranged in an annular shape around the rotation axis. Each divided core member includes a laminated iron core 5, an insulator 6, and a coil 7. The laminated iron core 5 is made of an amorphous metal material that is thinly formed into a tape shape (for example, about 25 μm), and tape pieces that become smaller in width toward the axis are sequentially laminated to have a substantially trapezoidal columnar shape. The laminated iron core 5 may be laminated in the rotation direction, and the shape is not limited to a substantially trapezoidal shape, and is not limited to an amorphous magnetic material, but may be an electromagnetic steel plate, a dust core, or a permendur. A soft magnetic material such as In addition, when applying an amorphous metal, an electromagnetic steel plate, a permendur, etc., in order to suppress an eddy current, it is preferable to laminate | stack the laminated core 5 in the circumferential direction or radial direction.

  The insulator 6 is made of a non-magnetic and non-conductive insulating material, and resin is applied in this embodiment. The insulator 6 has a cylindrical shape having an inner peripheral shape that substantially matches the outer peripheral shape of the laminated core 5 and is obtained by injection molding, optical modeling, or three-dimensional modeling. A laminated core 5 is inserted into the insulator 6, and a coil 7 made of copper, aluminum, or the like is wound around the outer cylinder portion of the insulator 6, thereby forming one divided core member.

  Also, in the vicinity of both edges in the axial direction of the insulator 6, flanges 6 a are formed that extend with a predetermined width in the axial direction and in the rotational direction along the outer peripheral shape of the cylinder, that is, with respect to the axial direction. This is due to consideration of insulation of generated eddy currents and positioning of adjacent divided cores. In the case of a radial gap type motor, the magnetic flux for generating torque is mainly in the radial direction, and in order to reduce the eddy current in the iron core, the stator is generally configured by laminating thin plates in the axial direction. On the other hand, in the case of the motor 1, the magnetic flux is mainly in the axial direction, and in order to reduce the eddy current in the in-plane direction, electrical insulation is performed in the direction perpendicular to the magnetic flux flow in the radial direction and the circumferential direction. Necessary. It is preferable to further provide a shielding member for insulation on the side of the flange portion 6a facing the rotors 3a and 3b. In addition, this invention is not limited to the aspect which provides the insulator 6 with the collar part 6a. Moreover, the structure provided in one part may be sufficient, without providing the collar part 6a over the perimeter of a cylinder part outer periphery.

  In the present embodiment, the stator 2 is configured such that the annularly arranged divided cores and the housing are integrally molded with resin. This is for securing the strength and insulation between the divided cores and fixing them to the housing. When the side surfaces in the rotational direction of the adjacent flange portions 6a are in contact with each other, positioning in the mold is facilitated when resin molding is performed. Accordingly, the width of the flange portion 6a toward the outer peripheral side in the radial direction is larger than the thickness of the coil 7 wound around the outer cylinder portion of the insulator 6. The present invention is not limited to the resin mold, and a resin or metal connection piece is bonded or riveted between the flanges 6a of the adjacent insulators 6, or the radially outer side of the flange 6a and / or The structure which arrange | positions an annular member to an axial center side, and adheres or rivets may be sufficient.

The rotor 3a includes a rotor magnet 8a, a rotor core 9a, and a rotor flange 10a. Since the rotor 3b has the same configuration, the description thereof is omitted.
The magnet 8a is made of a permanent magnet such as neodymium or ferrite. It has a ring shape in which approximately sector-shaped magnets having different magnetic poles equally divided in the radial direction are alternately arranged. In addition, the rotor magnet 8a may be configured as a ring-shaped integral body in addition to the configuration in which the pole is divided in the circumferential direction for each pole.

In the present embodiment, the end surface of the rotor magnet 8a faces the stator core 2 in the axial direction, and therefore, similarly to the stator core 2, it receives a change in the magnetic flux directly. A phenomenon occurs in which an eddy current flows as occurs.
Neodymium magnets have a large energy product and a large torque can be expected, but on the other hand, since the electrical resistance is low, eddy current tends to flow and the efficiency tends to decrease. Therefore, when a neodymium magnet is used, the magnet is divided in the direction perpendicular to the axis to be electrically insulated or embedded in the rotor core 5 described below to reduce the influence of magnetic flux changes. Also good.
On the other hand, ferrite magnets have a smaller energy product than neodymium magnets, but have high electrical resistance and eddy currents hardly flow. For this reason, it is not necessary to take a configuration such as magnet division or embedding in the rotor core 5. In addition, since the material is iron oxide, it is also resistant to rust.

  The rotor core 9a is made of a soft magnetic material such as an electromagnetic steel plate, a powder magnetic core, an amorphous metal or permendur, or iron, like the laminated iron core 5, and has a donut shape with a hole through which the rotation shaft passes in the center. Have. The rotor core 9a also changes in magnetic flux when the motor 1 is driven. However, since the influence of the eddy current is relatively smaller than that of the laminated iron core 5, the rotor core 9a may be configured as an integral member of iron. In order to suppress the eddy current loss as much as possible, it is preferable to apply a magnetic powder core or to laminate a thin plate material such as an electromagnetic steel plate, amorphous metal, or permendur. In this case, the above-described material may be configured to have a wound iron core in a balm Kuchen shape.

  The rotor flange 10a is a member for fixing the rotor magnet 8a and the rotor core 9a, and has a donut shape provided with a hole through which the rotation shaft passes in the center. On the inner peripheral side and the outer peripheral side of the rotor flange 10a, an inner peripheral protrusion 11a extending to the stator core 2 side along the rotation axis and an outer peripheral protrusion 12a are provided. The rotor magnet 8a and the rotor core 9a are disposed so that the end surfaces in the radial direction are bonded with an adhesive or the like, and are sandwiched between both circumferential side surfaces of the inner peripheral projection 11a and the outer peripheral projection 12a.

  This arrangement is for obtaining stress against centrifugal force generated in the rotor magnet 8a and the rotor core 9a. In this regard, a configuration in which only the outer peripheral projection 12a is provided may be used. However, when the rotor core 9a has a divided configuration, the inner peripheral projection 11a is also provided to prevent turning from the inner peripheral side and ease of positioning during assembly. Etc. can be profited.

  Further, in the present embodiment, the width in the rotation axis direction of both protrusions is close to the center of the circumferential side surface of the rotor magnet 8a. It takes into account the stress on centrifugal force and the effect on eddy currents. In the present embodiment, the inner peripheral protrusion 11a and the outer peripheral protrusion 12a are configured as continuous wall portions along the periphery. However, the inner peripheral protrusion 11a and the outer peripheral protrusion 12a may be configured discontinuously at regular intervals, or both or one of them. May be a nail portion.

  FIG. 2 shows a configuration example of the housing and armature of the motor 1. FIG. 2A shows the configuration of the first embodiment, and FIG. 2B shows the configuration of the modification. In FIG. 2A, as described above, the stator 2 is integrally fixed by resin on the inner periphery of the housing 20. The rotors 3a and 3b are fixed to the rotary shaft 4 at the center. Both end portions of the rotating shaft 4 are connected to a flange 21 through a bearing 22 so as to be rotatable, and the outer peripheral side of the flange 21 is connected to the vicinity of both side openings of the substantially cylindrical housing 20. .

  In the configuration of FIG. 2B, a bearing holder 23 that is integrally formed is provided on the inner peripheral side of the stator 2, the bearings 22 are disposed in the vicinity of both ends of the bearing holder 23 in the rotation axis direction, and the rotors 3 a and 3 b. It is the structure connected with the rotating shaft 4 fixed to. Since the bearing holder 23 in FIG. 2B plays the same role as the brackets 21 and 20 in FIG. 2A, the housing 20 and the bracket 21 are not required in FIG. In the case of (b), it is the structure which can ensure the flatness of the motor 1 by ensuring the structure which hold | maintains the stator 2 elsewhere.

  When the split core member and the housing are integrally molded with resin, first, the split core member may be individually molded with resin, and then arranged in an annular shape within the mold and molded with the housing 20 integrally. . Alternatively, the individual divided core members may be metallic annular rings, and the inner peripheral side and / or outer peripheral side of the flange portion 6a may be fixed, or adjacent divided cores may be connected by a plate-like piece. You may make it carry out, and you may shape | mold and connect so that a part of collar part 6a may engage. Further, the fixing of the stator 2 and the housing is not limited to the integral molding of the resin, but a continuous or discontinuous annular protrusion is provided on the inner periphery of the housing 20 to arrange the stator 2 or other bolting or the like. It may be configured.

Next, the configuration of the insulator 6 that is one of the features of the present embodiment will be described.
FIG. 3 shows the configuration of the insulator 6. FIG. 4A shows a cross section in the direction of the rotation axis, and FIG. 4B shows a partially enlarged view. In each case, the collar portion 6a is omitted.
The insulator 6 includes a main body 30 (second insulating member) and a lid 31 (first insulating member).
The main body 30 has an inner surface that approximately matches the shapes of the upper base and the oblique side surface of the laminated core 5 having a substantially trapezoidal columnar shape, and is formed integrally with the flange portion 6a. The inner side surface and each surface of the laminated iron core are substantially in contact with each other. And the groove part 32 is formed in the rotation direction both ends of the inner surface of the main-body part 30. As shown in FIG. After the laminated core 5 is inserted into the main body 30, the lid end portion 31 a that is the side surface in the rotational direction of the lid portion 31 is fitted into the groove portion 32.

  Here, the groove inner wall 32 a on the axial center side of the groove 32 is a gentle slope from the bottom of the groove 32 toward the inner wall of the insulator 6. On the contrary, the groove inner wall 32b on the radially outer peripheral side of the groove portion 32 is parallel to the outer peripheral side surface of the lid portion 31 in order to ensure the locked state.

  The lid portion 31 has a square shape, and the length in the rotation direction is approximately the same as the length between both bottom portions of the groove portion 32 of the main body portion 30. The thickness of the lid end portion 31 a in the radial direction has a dimension that is slightly smaller than the distance between the inner walls 32 a and 32 b of the groove portion 32 of the main body portion 30. This is to ensure a frictional force between the inner peripheral surface of the insulator 6 and the laminated core 5 as will be described later.

  When the vertical distance from the groove edge portion 32c on the axial center side of the groove portion 32 to the inner surface on the upper bottom side is R ′ and the vertical distance between the upper bottom and the lower bottom of the laminated core 5 is R, the main body portion 30 is slightly R has a dimension larger than R ′. This is because the laminated iron core 5 is pressed against the inner cylinder side of the insulator 6 to ensure the frictional force between the insulator 6 and the laminated iron core 5 and to ensure the fixed state of both. Furthermore, even if this dimensional difference is caused when the length R is slightly smaller than planned due to the variation in the thickness of the laminated core 5, the insulator 6 and the laminated core 5 have a certain pressing force. It functions as a play to secure the fixed state of.

  FIG. 4 schematically shows a locked state between the main body 30 and the lid 31. (A) is a perspective view from the outer peripheral side of the motor 1, (b) is a perspective view from a rotating shaft direction ((b) abbreviate | omits and shows the collar part 6a).

  After inserting the laminated iron core 5 in the rotation axis direction through one of the flange portions 6a into the main body portion 30, the lid portion 31 is pressed and fitted in the axial direction so that the lid end portion 31a and the groove portion 32 are fitted. Since the laminated iron core 5 allows only the flange portion 6a having a small thickness in the rotation axis direction to pass therethrough, the laminated iron core 5 significantly contributes to prevention of turning up of the laminated piece during insertion and improvement of workability. In particular, in this embodiment, since the laminated piece uses a tape-like amorphous metal material that is thinner than the steel plate piece that is generally used in the laminated iron core, the rigidity in the rotation axis direction is low. The effect can be expected particularly in the case of the iron core using the laminated piece having low rigidity in the rotation axis direction.

  Moreover, since the axial center side of the side surface in the rotational direction of the lid end portion 31a has a gentle slope toward the inner peripheral side of the insulator 6 in the same manner as the groove inner wall 32a, the inclination is the outer peripheral side of the groove inner wall 31b. Is spread in the rotation direction, and the lid portion 31 is easily fitted into the main body portion 30. Furthermore, since the outer peripheral side surface of the lid end portion 31a and the groove inner wall portion 32b are perpendicular to the radial extension line from the shaft center, the lid portion 31 and the groove portion 32 are reliably locked and are difficult to come off.

  Further, by making the cross-sectional shape of the lid end portion 31 a slightly smaller than the cross-sectional shape of the groove portion 32, a pressing force toward the inner peripheral side of the insulator 6 is generated while absorbing the variation in the thickness of the laminated core 5. The fixed state of the main body 30 and the lid 31 can be ensured.

[Modification of First Embodiment]
A modification of the insulator 6 in the first embodiment will be described. In the motor 1, the stator core 2 is in an electrically floating state, and it is necessary to provide a ground. In the radial gap type motor, for example, since the stator core is shrink-fitted or press-fitted into the housing, the housing and the stator core are electrically coupled, and the ground can be easily taken from the housing.

  In the motor 1, the stator core 2 and the housing 20 are integrally formed of a resin mold, but the coil 7 wound around the outer cylinder portion of the insulator 6 and the housing 20 need to be insulated from each other. The resin is inserted between the housing 20 and the housing 20. For this reason, the laminated iron core 5 has a non-contact structure in the housing. For this reason, in the motor 1, the laminated iron core 5 and the housing 20 are electrically connected by a conductive member.

  As the ground, a conductive band (plate piece) or wire is sandwiched between the outer peripheral surface of the laminated iron core 5 and the inner peripheral surface of the insulator 6 and connected to the inner peripheral surface of the housing. After the lid portion 31 is fitted into the main body portion 30, the laminated iron core 5 and the inner peripheral surface of the insulator 6 are in a close contact state with a constant pressing force. There is a risk of damage and workability.

  Therefore, as shown in FIG. 5, the insulator 6 according to the modified example has a configuration in which a grounding groove 35 extending in the rotation axis direction is provided in the vicinity of the center of the lid 31. According to the insulator 6 of the modification, the grounding of the laminated iron core 5 and the installation of the ground can be easily and reliably performed.

  In this modification, the groove depth of the grounding groove portion 35 is substantially the same as the thickness of the conductive member. However, after the main body portion 30 and the lid portion 31 are fitted together, the conductive member is inserted. In this case, a part of the conductive member (preferably near the center in the rotational axis direction) is curved in the axial direction so that it is sufficiently in contact with the laminated core 5 by the spring effect, and the ground groove 35 is electrically conductive. The thickness of the conductive member may be slightly larger than the thickness of the conductive member so that the conductive member can be easily inserted.

[Second Embodiment]
One feature of the motor 1 according to the second embodiment is that a plurality of groove portions 32 provided in the main body portion 30 of the insulator 6 according to the first embodiment are provided on the inner wall on the iron core side in the axial direction. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 6 shows a cross-sectional configuration of the insulator 206 in the second embodiment (the flange portion 6a is omitted). As shown in FIG. 5A, the inner peripheral surface in the rotation direction of the main body 230 has a plurality of grooves 232 formed at equal intervals from the outer peripheral direction toward the axial center. The groove portions 232 are arranged so as to be separated by a distance r on an extension line that is perpendicular to a radial extension line passing through the axis. In addition, the structure of the groove inner walls 232a and 232b of each groove part 232 is the same as that of 1st Embodiment.

  Similarly to the first embodiment, the lid portion 231 has a plate shape that is approximately the same width as the width between the groove portions 232 on the radially outermost circumferential side, and includes a lid end portion 231a and a step portion 231b. In the second embodiment, the lid portion 231 can be fitted into any one of the groove portions 232 corresponding to the rotation direction. That is, when the variation in the thickness of each laminated iron core 5 becomes larger than r, the pressing force of the lid portion 231 to the inner peripheral side of the insulator 6 is changed by changing the set of the groove portions 232 to be fitted in the radial direction. Can be held. In addition, the distance between the groups of the groove portions 232 becomes shorter from the radially outer peripheral side toward the axial center side. Therefore, by preparing the lid portion 231 whose width in the rotational direction is adjusted for each set of the groove portions 232, the laminated iron core 5 and the insulator 6 can be connected to each other without applying an excessive load in the rotational direction of the main body portion 231. The holding state can be maintained, which is advantageous in terms of cost and work.

  The step portion 231b has a configuration in which a thickness r is added to the outer peripheral side of the lid portion 31a of the first embodiment. For example, if the set of the groove portions 232 to be fitted is changed to a set on the outermost peripheral side and one axial center side due to variations in the thickness of the laminated iron core 5, the lid portion 231 is shifted to the axial center side by r. When the coil is wound around the outer cylinder portion of the insulator 6, there is a possibility that a gap is generated between the outer peripheral side surface of the lid portion 231 and the coil, or that the groove inner wall 232b of the groove portion 232 is deformed due to the coil tension. Since the stepped portion 231b sticks out to the outer peripheral side in the radial direction by r, the influence of the winding of the coil 7 can be reduced.

In addition, the groove width of the axial direction of each groove part 232 is not limited to an equal interval, You may differ.
In addition, when the portion that forms the groove portion 232 on the outer peripheral side of the groove portion 232 into which the lid portion 231 is fitted is cut off and used, when the stator core 2 has a different diameter and the same number of slots, for each diameter. It is not necessary to prepare the combined main body 230, and improvement in mass productivity can be expected.

[Third Embodiment]
In 1st and 2nd embodiment, it was the example premised on the structure by which the collar part 6a is provided in the main-body part 30 grade | etc., Of the insulator 6. FIG. In the case of this configuration, the stress in the rotation direction of the main body can be obtained by the flange portion 6a portion on the radially outer peripheral side of the main body 30 and the like. Therefore, even if the lid portion 31 or the like is fitted in the groove portion 32 or the like on the iron core side surface of the main body portion 30 or the like, there is little possibility that the main body portion 30 is damaged. That is, 1st and 2nd embodiment is the structure which hold | maintains the cover part 31 grade | etc., From the rotation direction outer side.

  Here, when there is no collar part 6a, there is a possibility that the rotational direction stress of the main body part 30 and the like is also weakened. One feature of the motor 1 according to the third embodiment is that the lid has a configuration for holding the main body from the outside in the rotational direction. Further, one of the features is that the radial end of the main body and the rotational end of the lid are engaged.

  In FIG. 7, the structure of the insulator 6 of 3rd Embodiment is shown. In addition, the same code | symbol is attached | subjected to the same member as other embodiment, and description is abbreviate | omitted. FIG. 5A is an enlarged view of one end portion of the main body 330 and the lid 331 of the third embodiment. In the present embodiment, the collar portion 6a is not provided.

  Locking portions 333a and 333b that engage in the radial direction are provided at the end of the main body 330 and the end of the lid 331, respectively. The locking portion 333a has a configuration in which the end portion is hung over in the axial direction so as to engage with the locking portion 333b located on the inner side from the outer side in the rotation direction. Moreover, the latching | locking part 333a has the hook-shaped part 334a which protrudes in the rotation direction at the front-end | tip. The locking portion 333b has a hook-shaped portion 334b protruding outward in the rotation direction at the tip thereof, and has a shape that matches the shape of the internal space surrounded by the lid portion 331, the locking portion 333a, and the hook-shaped portion 334a. It has become.

  As shown in FIG. 7B, the locking portion 333 a supports the locking portion 333 b from the outside in the rotation direction to the inside in the rotation direction by fitting the main body portion 330 and the lid portion 331. For this reason, the stress with respect to the expansion | deployment to the rotation direction of the main-body part 331 is produced. Further, the hook-shaped portions 334a and 334b can prevent the main body portion 330 and the lid portion 331 from coming off in the radial direction, and can secure the fixation between the two and the laminated core 5.

In the present embodiment, the locking portions 333a and 333b and the like are continuously provided on all the ends in the rotation axis direction of the main body portion 330 and the lid portion 331 in order to ensure the fixing of the insulator 6 and the laminated core 5. Although it was set as the structure, the structure which provides the latching | locking part 333a * 333b etc. discontinuously in a part of rotation direction may be sufficient.
Further, instead of providing the locking portion 333 a and the like in the lid portion 331, a configuration in which a hole through which the locking portion 333 b of the main body portion 330 penetrates may be provided in the end portion of the lid portion 331. Furthermore, the structure which makes the latching | locking part 333b protrude discontinuously from the radial direction outer side edge part of the main-body part 330, and penetrates them in the hole provided in the cover part 331 so as to correspond to each latching | locking part 333b may be sufficient.

[Fourth Embodiment]
In 1st-3rd embodiment, it was an example which fits and engages with the main-body part 31 grade | etc., By applying force toward the axial center side from the radial direction outer peripheral side to the lid | cover part 31 grade | etc.,. In 4th Embodiment, it is a structural example which installs a main-body part and a cover part by the slide of a rotating shaft direction.

  FIG. 8 shows an enlarged view of a partial radial side surface of the main body 430 and the lid 431 of the fourth embodiment. In FIG. 4A, the main body 430 has a groove 432 extending in the direction of the rotation axis in the vicinity of the radially outer end. The radial width of the groove portion 432 is substantially the same as or slightly larger than the radial thickness of the lid portion 431. In addition, a protruding portion 433 constituting the radial inner wall of the groove portion 432 is formed at the distal end portion on the radially outer peripheral side of the main body portion 430. The protrusion 433 has a shape that protrudes from the outer side in the rotation direction toward the laminated core.

The lid portion 431 has a flat plate shape in which the surface on the axial center side comes into contact with the radially outer side surface of the laminated core 5, and the length in the rotational axis direction is about ½ of the main body portion 430. It has a divided configuration.
As shown in FIG. 4B, each of the lid portions 431a and 431b is inserted into the groove portion 433 from opposite sides in the rotation axis direction.

  For example, when the lid portion 431 is a single flat plate that is not divided, the contact surface between the lid portion 431 and the laminated core 5 increases in proportion as the lid portion 431 is inserted from the groove portion 432, and thus the laminated core 5 There is a possibility that the insertion of the lid portion 431 may be difficult or impossible due to an increase in the frictional force. Furthermore, when the lamination direction of the laminated iron core 5 is the radial direction, there is a possibility that the steel plate piece on the outermost peripheral side surface is turned over. When the lamination direction is the rotation direction, the steel plate piece is partially in the radial direction. There is also a risk that a twist will occur.

  In this respect, in the present embodiment, the lid portion 431 is divided so that the length of each of the lid portions 431 is shortened in the rotation axis direction, so that when the one lid portion 431 is inserted, the friction area with the laminated iron core 5 is reduced. The maximum value is ½ compared to the case where no division is performed. Furthermore, since the one lid portion 431a and the other lid portion 431b are inserted from opposite sides of the rotation axis direction, the laminated core 5 can be prevented from being deformed in any rotation axis direction as a whole.

[Fifth Embodiment]
5th Embodiment is a structure which installs a cover part and a main-body part by a slide similarly to 4th Embodiment, However, The cover part has the structure which supports a main-body part to the laminated iron core 5 side from the rotation direction outer side. Is one of the features.

  In FIG. 9, the enlarged view of the radial direction partial side surface of the main-body part 530 of 5th Embodiment and the cover part 531 is shown. As shown in FIG. 5A, locking portions 533a and 533b that are engaged in the radial direction are provided at the radial front end portion of the main body portion 531 and the rotational end portion of the lid portion 531. The engaging portion 533a has a shape in which the end portion is hung over in the axial direction so as to engage with the engaging portion 533b located on the inner side from the outer side in the rotation direction. In addition, the locking portion 533 a has a hook-shaped portion 534 a that protrudes in the rotation direction near the laminated core 5. On the other hand, the latching | locking part 533b has the hook-shaped part 534b which protrudes to a rotation direction outer side at a radial direction front-end | tip. The locking portion 533b has a shape that roughly matches the shape of the internal space surrounded by the lid portion 531, the locking portion 533a, and the hook-shaped portion 534a.

  Further, as shown in FIG. 5B, the lid portion 531 includes a lid portion 531a having a length that is ½ of the length in the rotation axis direction of the main body portion 530, and the lid portion, as in the fourth embodiment. 531b. The lid portions 531a and 531b are arranged to be slid to the main body portion 530 from the opposite side in the rotation axis direction. Specifically, the lid portion 531 is slid in the rotational axis direction at a position where the locking portion 533b of the main body portion 530 and the locking portion 534a of the lid portion 531 are engaged with each other.

  In this embodiment, since the lid 531 is configured to hold the main body 531 on the laminated core 5 side from the outer side in the rotation direction, the member that gives stress to the main body 531 in the rotation direction, for example, the flange 6. Even if there is no, there is no possibility that the main body 531 expands outward in the rotational direction.

  Further, the hooked portions 534a and 534b engage with each other on the opposite sides in the rotational direction, so that the fixed state of the insulator 6 and the laminated core 5 can be sufficiently maintained.

  The effects of the divided configuration of the lid portion 531 and the configuration of sliding the lid portion 531 are the same as in the fourth embodiment.

[Sixth Embodiment]
The sixth embodiment is similar to the first to fifth embodiments in that the radially outer both ends of the main body and the both ends of the lid in the rotational direction are in contact with each other to form the cylindrical insulator 6. Although it is the same, it is not the structure which fits and engages both, but is characterized in that the fixed state of the insulator 6 and the laminated iron core 6 is maintained by using a tension around which the coil 7 is wound.

In FIG. 10, the structure of the main-body part 630 of 6th Embodiment and the cover part 631 is shown. In FIG. 4A, the left side shows the front surface in the rotation axis direction of the main body 630 and the lid portion 631, and the right side in FIG.
The flange portion 6a of the insulator 6 is divided into a main body portion 630 and a lid portion 631, and is configured integrally with each other. Unlike the other embodiments, the surface where the main body portion 630 and the lid portion 631 come into contact is substantially flat. In addition, you may make it provide an uneven | corrugated | grooved part etc. in the contact surface of the main-body part 630 and the cover part 631 for positioning at the time of combining both.

  A convex portion 631a is provided on the side surface on the radial axis side of the lid portion 631. The convex portion 631a extends in the direction of the rotation axis of the side surface, and is configured such that the width in the rotation direction is slightly smaller than the length between both ends on the radially outer side of the main body portion 631. When the lid portion 631 and the main body portion 630 are assembled, the convex portion 631a presses the laminated core 5 in the axial direction. In other words, the insulator 6 and the laminated iron core 5 are secured. Furthermore, the convex part 631a can be expected to function as a spacer in the case where there is a variation in the thickness of the laminated core 5.

  After the laminated iron core 5 is installed on the inner cylinder portion of the main body 630, the lid 631 is installed with the convex portion 631a facing the laminated iron core 5 side. Next, as shown in FIG. 2B, the coil 7 is wound around the outer cylinder with a predetermined tension. In addition, after arrange | positioning the cover part 631, you may make it wind the coil 7, after temporarily fixing with the band 600, an adhesive agent, or an adhesive tape.

As described above, the sixth embodiment can simplify the configuration of the main body 630, the lid 631, and the vicinity of the contact surface. Moreover, since the collar part 6a is also divided | segmented, there is no possibility that an excessive load may be applied when assembling both. Furthermore, against the force of approximately 360 degrees applied to the laminated iron core 5 side by the tension of the coil 7, the pressing force by the convex portion 631 further promotes the stress of the laminated iron core 5, and the main body 630 and the lid 631 are securely fixed. To.
In the sixth embodiment, the insulator 6 has the configuration having the flange portion 6a. However, even if the configuration has no flange portion 6a, the effect of the present embodiment can be expected.

〔Production method〕
Finally, a method for manufacturing the insulator 6 in the first to sixth embodiments will be described. The insulator 6 made of an insulating resin is generally manufactured by injection molding in which a resin is sealed in a mold, but can also be manufactured by three-dimensional modeling or the like. When three-dimensional modeling is used, it can be used not only for manufacturing the insulator 6 itself but also for producing a mold for injection molding. As the three-dimensional modeling, for example, an additive manufacturing machine or a cutting RP device is used.

As the layered modeling, an optical modeling method, a powder sintering layered modeling method, an ink jet method, a resin dissolution lamination method, a gypsum powder method, a sheet molding method, a film transfer image lamination method, a metal stereolithography combined processing method, and the like can be applied.
The data for additive manufacturing and cutting is generated by processing 3D data generated by CAD, CG software, or a 3D scanner into NC data by CAM. Three-dimensional modeling is performed by inputting the data to a three-dimensional modeling machine or a cutting RP device. Note that NC data may be directly generated from 3D data by CAD / CAM software.

  Further, as a method of obtaining the insulator 6, a data provider or a servicer who created 3D data or NC data of the insulator 6 can distribute the data in a predetermined file format via a communication line such as the Internet, and the user can obtain the data in 3D. A manufacturing method in which a modeling machine, a computer that controls the modeling machine, or the like is downloaded or accessed as a cloud-type service and molded and output by a three-dimensional modeling machine is also possible. It is also possible for the data provider to record 3D data or NC data on a non-volatile recording medium and provide it to the user.

If the one aspect | mode of the insulator 6 by such a manufacturing method is shown, it will be substantially the same as the outer periphery shape of the iron core which consists of a substantially column body which has the shape of the radial cross section which becomes large in a rotation direction width | variety toward an outer peripheral side from an axial center side. And an outer cylindrical portion around which the coil disposed on the outer peripheral side of the iron core is wound, and the outer peripheral surface of the iron core on the side where the width in the rotational direction becomes large, A first insulating member that contacts, and a second insulating member that contacts an outer peripheral portion of the iron core excluding an outer peripheral surface of the iron core that contacts the first insulating member, and both radial ends of the second insulating member; It is a method of manufacturing with a three-dimensional modeling machine based on three-dimensional data of an insulating member formed by contacting both ends of the first insulating member in the rotational direction.
In addition, the method of manufacturing a 1st insulating member and a 2nd insulating member independently with a three-dimensional modeling machine may be sufficient.

Furthermore, if another aspect is shown, the inner cylinder part of the substantially same shape as the outer periphery shape of the iron core which consists of the substantially columnar body which has the shape of the radial direction cross section in which a rotation direction width | variety becomes large toward an outer peripheral side from an axial center side. And a method for transmitting and distributing data for a three-dimensional modeling machine of an insulating member having an outer tube portion around which a coil disposed on the outer peripheral side of the iron core is wound, the outer periphery of the iron core on the side where the width in the rotational direction is increased A first insulating member that is in contact with the surface, and a second insulating member that is in contact with an outer peripheral portion of the iron core excluding the outer peripheral surface of the iron core that is in contact with the first insulating member, and both radial ends of the second insulating member And the data for the three-dimensional modeling machine of the insulating member formed by contacting both ends of the first insulating member in the rotation direction via a communication line.
In addition, the method of transmitting and delivering the data for 3D modeling machines of the first insulating member and the second insulating member independently may be used.

As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to the said aspect, A various change is possible in the range which does not deviate from the meaning.
For example, although the laminated iron core 5 and the insulator 6 having the inner cylinder corresponding to the outer peripheral shape thereof have been given examples in which the cross section is substantially trapezoidal, a part or all of them may be curved. That is, when the stator 2 has a plurality of divided core members arranged in an annular shape, it is conceivable that the surface on the radial axis side and / or the outer peripheral side of the iron core is substantially concentric with the other iron cores. . In this case, the radial outer peripheral side and / or inner peripheral side surface of each iron core or the like is a curved surface having a cross section of an arc.

  In this embodiment, a motor is used as an example of a rotating electrical machine, but a generator may be used.

1 motor,
2 stator,
3a / 3b rotor,
5 laminated iron core
6 Insulator,
6a
7 coils,
8a / 8b Rotor magnet,
9a, 9b rotor core,
10a, 10b rotor flange,
11a, 11b Inner peripheral projection,
12a, 12b outer protrusion,
20 housing,
21 flange,
22 bearings,
23 bearing holder,
30 body part,
31 lid,
31a / 31b lid end,
32 groove,
32a and 32b groove inner wall,
35 Grounding groove,
231b Stepped portion,
333a / 333b locking portion,
334a, 334b bowl-shaped part

Claims (18)

An iron core formed of a substantially columnar body having a shape of a radial cross section in which a rotation direction width increases from the axial center side toward the outer peripheral side; an insulating member having an inner cylinder shape substantially the same as the outer peripheral shape of the iron core; A stator having a core member formed of a coil wound around an outer cylindrical portion of an insulating member, and a stator in which a plurality of the core members are arranged in an annular shape around a rotation axis; and at least one end surface of the iron core and a rotation axis direction An axial gap type rotating electrical machine having at least one rotor facing the surface with a gap between
The insulating member is
A first insulating member in contact with the outer peripheral surface on the side where the width in the rotational direction is increased;
A second insulating member that contacts an outer peripheral portion of the iron core excluding an outer peripheral surface with which the first insulating member contacts;
The both ends in the radial direction of the second insulating member are in contact with both ends in the rotational direction of the first insulating member,
The second insulating member has a groove on the surface on the iron core side in the vicinity of both ends in the radial direction,
An axial gap type rotating electrical machine in which the groove and the both ends in the rotational direction of the first insulating member are fitted. The axial gap type rotating electrical machine according to claim 1,
An axial gap type rotating electrical machine in which the radial width of the groove is greater than or substantially the same as the radial thickness at both ends in the rotational direction of the first insulating member. The axial gap type rotating electrical machine according to claim 1,
An axial gap type rotating electrical machine in which the second insulating member has a plurality of the groove portions in the axial direction. An axial gap type rotating electrical machine according to claim 3,
An axial gap type rotating electrical machine in which the first insulating member has a convex portion extending in a rotational axis direction on a radially outer peripheral surface. The axial gap type rotating electrical machine according to claim 1,
An axial gap type rotating electrical machine in which the groove extends in the direction of the rotation axis. The axial gap type rotating electrical machine according to claim 1,
An axial gap type rotating electrical machine in which the first and second insulating members are fitted by pressing the first insulating member from the radially outer peripheral side to the axial center side. The axial gap type rotating electrical machine according to claim 1,
An axial gap type rotating electrical machine in which the first insulating member is composed of a plurality of members divided in the radial direction. The axial gap type rotating electrical machine according to claim 1 or 7,
An axial gap type rotating electrical machine in which the first and second insulating members are fitted by inserting the first insulating member from the rotation axis direction. The axial gap type rotating electrical machine according to claim 1,
An axial gap type rotating electrical machine in which the first insulating member has a groove extending in the rotation axis direction on a surface that contacts the outer peripheral surface on the side where the width in the rotation direction is large. An iron core composed of a substantially columnar body having a shape of a radial cross section whose width in the rotational direction becomes a base from the axial side toward the outer peripheral side, an insulating member having an inner cylinder shape substantially the same as the outer peripheral shape of the iron core, and A stator having a core member formed of a coil wound around an outer cylindrical portion of an insulating member, and a stator in which a plurality of the core members are arranged in an annular shape around a rotation axis; and at least one end surface of the iron core and a rotation axis direction An axial gap type rotating electrical machine having at least one rotor facing the surface through a gap,
The insulating member is
A first insulating member in contact with the outer peripheral surface on the side where the width in the rotational direction is increased;
A second insulating member that contacts an outer peripheral portion of the iron core excluding an outer peripheral surface with which the first insulating member contacts;
The both ends in the radial direction of the second insulating member are in contact with both ends in the rotational direction of the first insulating member,
The first insulating member has a groove on the surface on the iron core side in the vicinity of both ends in the rotation direction,
An axial gap type rotating electrical machine in which the groove and the both ends in the radial direction of the second insulating member are fitted. An axial gap type rotating electrical machine according to claim 1 or 10,
An axial gap type rotating electrical machine in which the radial cross section of the iron core has a substantially rectangular shape. An axial gap type rotating electrical machine according to claim 1 or 10,
An axial gap type rotating electrical machine in which the radial cross section of the iron core has a substantially trapezoidal shape. An axial gap type rotating electrical machine according to claim 1 or 10,
An axial gap type rotating electrical machine, wherein the iron core is a laminated iron core. An axial gap type rotating electrical machine according to claim 1 or 10,
An axial gap type rotating electrical machine, wherein the iron core is a laminated iron core in which steel plate pieces are laminated in a radial direction. An inner cylinder portion having substantially the same shape as the outer peripheral shape of the iron core composed of a substantially columnar body having a radial cross-sectional shape with a width in the rotational direction increasing from the axial side toward the outer peripheral side, and disposed on the outer peripheral side of the iron core An insulating member having an outer tube portion around which a coil is wound,
A first insulating member in contact with the outer peripheral surface on the side where the width in the rotational direction is increased;
A second insulating member that contacts an outer peripheral portion of the iron core excluding an outer peripheral surface with which the first insulating member contacts;
The both ends in the radial direction of the second insulating member are in contact with both ends in the rotational direction of the first insulating member,
The second insulating member has a groove on the surface on the iron core side in the vicinity of both ends in the radial direction,
An insulating member in which the groove portion and both ends in the rotational direction of the first insulating member are fitted. An inner cylinder portion having substantially the same shape as the outer peripheral shape of the iron core composed of a substantially columnar body having a radial cross-sectional shape with a width in the rotational direction increasing from the axial side toward the outer peripheral side, and disposed on the outer peripheral side of the iron core An insulating member having an outer tube portion around which a coil is wound,
A first insulating member in contact with the outer peripheral surface on the side where the width in the rotational direction is increased;
A second insulating member that contacts an outer peripheral portion of the iron core excluding an outer peripheral surface with which the first insulating member contacts;
The both ends in the radial direction of the second insulating member are in contact with both ends in the rotational direction of the first insulating member,
The first insulating member has a groove on the surface on the iron core side in the vicinity of both ends in the rotation direction,
An insulating member in which the groove and the both ends in the radial direction of the second insulating member are fitted. An iron core formed of a substantially columnar body having a shape of a radial cross section in which a rotation direction width increases from the axial center side toward the outer peripheral side; an insulating member having an inner cylinder shape substantially the same as the outer peripheral shape of the iron core; A stator having a core member formed of a coil wound around an outer cylindrical portion of an insulating member, and a plurality of the core members arranged in an annular shape around a rotation axis;
The insulating member is
A first insulating member in contact with the outer peripheral surface on the side where the width in the rotational direction is increased;
A second insulating member that contacts an outer peripheral portion of the iron core excluding an outer peripheral surface with which the first insulating member contacts;
The both ends in the radial direction of the second insulating member are in contact with both ends in the rotational direction of the first insulating member,
The second insulating member has a groove on the surface on the iron core side in the vicinity of both ends in the radial direction,
The groove and the both ends in the rotational direction of the first insulating member are fitted.
stator. An iron core formed of a substantially columnar body having a shape of a radial cross section in which a rotation direction width increases from the axial center side toward the outer peripheral side; an insulating member having an inner cylinder shape substantially the same as the outer peripheral shape of the iron core; A stator having a core member formed of a coil wound around an outer cylindrical portion of an insulating member, and a plurality of the core members arranged in an annular shape around a rotation axis;
The insulating member is
A first insulating member in contact with the outer peripheral surface on the side where the width in the rotational direction is increased;
A second insulating member that contacts an outer peripheral portion of the iron core excluding an outer peripheral surface with which the first insulating member contacts;
The both ends in the radial direction of the second insulating member are in contact with both ends in the rotational direction of the first insulating member,
The first insulating member has a groove on the surface on the iron core side in the vicinity of both ends in the rotation direction,
A stator that is formed by fitting the groove and both ends in the radial direction of the second insulating member.