JP6676219B2 - Armature core of rotating electric machine - Google Patents

Description

  The present invention relates to a structure of an armature core used in a rotating electric machine, and more particularly to an armature core of a rotating electric machine that can improve productivity of an armature core without impairing good operating characteristics of the rotating electric machine.

  BACKGROUND ART Conventionally, there is known a rotating electric machine in which a plurality of armature coils are wound around a plurality of magnetic pole teeth of an armature core to form an armature. The armature core has an annular back yoke portion and a plurality of magnetic pole teeth protruding from the back yoke portion at equal intervals. A space called a slot is formed between the magnetic pole teeth, and each slot houses an armature coil.

  The armature core is made of a laminated steel sheet in which thin plate-shaped core pieces are laminated in order to prevent an increase in iron loss due to eddy current. It is also known that the characteristics of the rotating electric machine can be improved by providing a claw-shaped shoe that spreads left and right at the tip of each magnetic pole tooth.

  However, when the shoe is provided at the tip of the magnetic pole teeth, the width of the slot opening becomes narrower than the slot width. For this reason, there is a problem that the operation of storing the armature coil in the slot becomes complicated and productivity is deteriorated.

  In order to solve this problem, a method has been proposed in which the shoe is separated from the magnetic pole teeth, and the magnetic pole teeth and the shoe parts are connected via a pin serving as a rotation axis to make the shoe parts rotatable. . By adopting this method, it is possible to realize a structure of an armature core in which the shoe component is rotated in the axial direction when the armature coil is inserted into the slot and the slot opening width is widened to improve the workability (for example, And Patent Document 1).

JP 2009-284707 A

However, the related art has the following problems.
After inserting the armature coil into the slot, in order to use it as the armature of the rotating electric machine, a step of positioning and fixing the shoe component to the magnetic pole teeth is required. For example, in Patent Document 1, the entire armature is molded and fixed. Furthermore, in Patent Literature 1, a jig such as a shaft rod passing through the inner diameter side of the armature core is required to temporarily fix the posture of the shoe component during molding.

  That is, in the prior art, while the workability of inserting the armature coil into the slot is good, a step and a jig for fixing the shoe component are separately required.

  The present invention has been made in order to solve such a problem, and it is an object of the present invention to obtain an armature core of a rotating electric machine that can improve the productivity of an armature while improving the operating characteristics of the rotating electric machine. Aim.

  The armature core of the rotary electric machine according to the present invention is an armature core of the rotary electric machine having an annular back yoke and a plurality of magnetic pole teeth projecting radially inward from the inner peripheral wall surface of the back yoke, Each of the plurality of magnetic pole teeth has, at the tip in the protruding direction, a claw-shaped shoe that spreads on both sides in the circumferential direction. The shoes that spread on both sides in the circumferential direction are separate parts separated from the magnetic pole teeth. It is constituted as two parts of a shoe part and a second shoe part, and the part constituting the back yoke and the magnetic pole teeth, and the two parts are constituted by laminating and connecting core pieces, which are thin steel plates. , The magnetic pole teeth are provided with a first shaft portion at a protruding portion at the tip, the first shoe component is provided with a second shaft portion fitted with the first shaft portion, and the second shoe component is Fit with the second shaft The second shoe component is located along the elongated hole and in contact with the first shoe component in a direction perpendicular to the direction in which the magnetic pole teeth protrude. Can be slid between a reduced position, which is a distance from the first shoe component, and an enlarged position, which is a position away from the first shoe component. After sliding to the enlarged position, the first shaft portion and the second shaft portion fitted to each other are rotated. The first shoe component is configured to be rotatable about the first shaft portion and the second shaft portion fitted to each other after the second shoe component is slid to the enlarged position. It is provided with.

  The armature iron core of the rotating electric machine of the present invention is capable of sliding in a direction perpendicular to the direction in which the magnetic pole teeth protrude, and a shoe component capable of rotating after being separated from a component that has been in contact with the sliding operation. It is provided with. As a result, it is possible to obtain an armature core of the rotating electric machine that can improve the productivity of the armature while improving the operating characteristics of the rotating electric machine.

FIG. 2 is a plan view showing the rotating electric machine according to Embodiment 1 of the present invention. FIG. 2 is a partially enlarged view of an armature of the rotary electric machine according to Embodiment 1 of the present invention. FIG. 3 is a perspective view showing respective core pieces constituting an armature core of the rotary electric machine according to Embodiment 1 of the present invention; FIG. 3 is a perspective view showing respective core pieces constituting an armature core of the rotary electric machine according to Embodiment 1 of the present invention; FIG. 3 is a perspective view showing respective core pieces constituting an armature core of the rotary electric machine according to Embodiment 1 of the present invention; FIG. 5 is a diagram for explaining the operation of the shoe component of the armature core of the rotary electric machine according to Embodiment 1 of the present invention, and is a diagram when the shoe component is slid. FIG. 5 is a diagram for explaining the operation of the shoe component of the armature core of the rotary electric machine according to Embodiment 1 of the present invention, in which the shoe component is slid and then rotated. FIG. 10 is a plan view showing a rotating electric machine according to Embodiment 2 of the present invention. FIG. 9 is a partially enlarged view of an armature of a rotary electric machine according to Embodiment 2 of the present invention. FIG. 13 is a diagram for explaining the operation of the shoe component of the armature core of the rotary electric machine according to Embodiment 2 of the present invention, and is a diagram when the shoe component is slid. It is a figure explaining operation | movement of the shoe part of the armature core of the rotary electric machine which concerns on Embodiment 2 of this invention, and is a figure at the time of rotating operation after sliding operation of a shoe part. FIG. 13 is a partially enlarged view of an armature of a rotary electric machine according to Embodiment 3 of the present invention.

  Hereinafter, preferred embodiments of an armature core of a rotating electric machine according to the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
FIG. 1 is a plan view showing a rotating electric machine 1 according to Embodiment 1 of the present invention. In FIG. 1, a rotating electric machine 1 includes a rotor 2 and an armature 5. The rotor 2 is fixed to a rotating shaft 4 rotatably supported by a housing (not shown), and is disposed in the housing. On the other hand, the armature 5 surrounds the rotor 2 with a certain gap between the armature 5 and the rotor 2. It is held in the housing.

  The rotor 2 includes a rotating shaft 4 and a rotor core inserted at an axial center position and fixed to the rotating shaft 4. Further, a plurality of magnets 3 are arranged on the outer peripheral surface of the rotor core 11 at equal pitches in the circumferential direction.

  The armature 5 includes an armature core 6 and an armature coil 9. The armature core 6 has magnetic pole teeth 8. A plurality of magnetic pole teeth 8 project radially inward from the inner peripheral wall surface of the annular back yoke 7 and are arranged at equal pitches in the circumferential direction. FIG. 1 illustrates an armature core 6 in which 36 magnetic pole teeth 8 are provided.

  On the other hand, the armature coil 9 is configured as a coil made by winding a conductor wire around each of the magnetic pole teeth 8 via an insulator (not shown). There is a space called a slot 10 between the adjacent magnetic pole teeth 8, and the armature coil 9 is housed in the slot 10.

  FIG. 2 is a partially enlarged view of the armature of rotating electric machine 1 according to Embodiment 1 of the present invention. FIGS. 3 to 5 are perspective views showing core pieces constituting an armature core of rotating electric machine 1 according to Embodiment 1 of the present invention. As shown in FIGS. 2 to 5, the armature core 6 is configured by laminating back yoke core pieces 7 </ b> A and 7 </ b> B formed of a thin steel plate. Further, the laminated steel plates are connected by caulking 17.

  At the tip of the magnetic pole teeth 8 in the protruding direction, a claw-shaped shoe extending on both sides in the circumferential direction is provided. The shoe on one side in the circumferential direction with respect to the magnetic pole teeth 8 is divided into shoe parts 80 which are made as separate parts. Here, the shoe component 80 is composed of core pieces 8A, 8C, 8E formed of a thin steel plate.

  On the other hand, the shoe on the other side in the circumferential direction is divided into shoe parts 81. Here, the shoe component 81 is composed of core pieces 8B, 8D, 8F formed from a thin steel plate.

  Next, the arrangement of each core piece constituting the armature core 6 will be described with reference to FIGS. As shown in FIG. 3, a corner 15 is provided at the tip of the back yoke core piece 7 </ b> A in the protruding direction of each magnetic pole tooth 8. Here, the shaft portion 14 is provided in the corner portion 15. A core piece 8E is arranged on one side in the circumferential direction of the magnetic pole teeth 8, and a core piece 8F is arranged on the other side in the circumferential direction.

  Further, as shown in FIG. 4, a back yoke core piece 7B is laminated on the back yoke core piece 7A. The back yoke core piece 7A and the back yoke core piece 7B are connected by caulking 17.

  In the back yoke core piece 7B, a core piece 8C is arranged on one side in the circumferential direction of a tip end of each magnetic pole tooth 8 in the protruding direction, and a core piece 8D is arranged on the other side in the circumferential direction. The core piece 8C is laminated on the core piece 8E, and the core piece 8D is laminated on the core piece 8F. Further, the core piece 8D is provided with a shaft portion 13, and the shaft portion 13 is fitted and connected to a shaft portion 14 provided at a corner 15 of the back yoke core piece 7A.

  Further, as shown in FIG. 5, the back yoke core pieces 7B are laminated on the back yoke core pieces 7B, and the back yoke core pieces 7B are connected to each other by caulking 17. In the back yoke core piece 7B shown in FIG. 5, a core piece 8A is arranged on one side in the circumferential direction of a tip end of each magnetic pole tooth 8 in the protruding direction, and a core piece 8B is arranged on the other side in the circumferential direction. .

  The core piece 8A is laminated on the core piece 8C, and the core piece 8B is laminated on the core piece 8D. The core piece 8A is provided with an elongated hole 12, and is fitted and connected to the shaft portion 13.

  The core pieces 8A, 8C, 8E and the core pieces 8B, 8D, 8F are connected by caulking 21, welding 22, and the like to form a shoe component 80 and a shoe component 81.

  Next, the operation of the shoe components 80 and 81 having such a configuration will be described. FIG. 6 is a diagram illustrating an operation of the shoe component of the armature core of rotating electric machine 1 according to Embodiment 1 of the present invention, and is a diagram when shoe component 80 is slid.

  FIG. 7 is a diagram for explaining the operation of the shoe component of the armature core of the rotary electric machine 1 according to Embodiment 1 of the present invention, in which the shoe component 80 is slid and then rotated. FIG. As shown in FIGS. 6 and 7, the shoe component 81 can rotate with respect to the magnetic pole teeth 8 using the shaft portions 13 and 14 as rotation axes.

  6 and 7, the shoe component 80 can slide using the shaft portion 13 and the elongated hole 12 as guides. As a result, the shoe component 80 can take a reduced position corresponding to a position close to (contact with) the shoe component 81 and an enlarged position corresponding to a position away from the shoe component 81. Further, the shoe component 80 can also perform a rotation operation with the shaft portion 13 as a rotation axis.

  When the shoe component 80 is at the reduced position, the shoe component 81 is in the way and cannot rotate. Similarly, when the shoe component 80 is at the reduced position, the shoe component 80 is in the way and cannot rotate.

  On the other hand, when the shoe component 80 is slid to the enlarged position, the shoe components 80 and 81 can be arranged at positions separated from each other. Therefore, when the shoe component 80 is at the enlarged position, the shoe component 80, 81 can perform a rotating operation without interfering with each other.

  Thereby, as shown in FIG. 7, the opening width of the slot 10 can be increased. As a result, the armature coil 9 can be easily inserted into the slot 10.

  After the armature coil 9 is inserted into the slot 10, the shoe components 80 and 81 are rotated in the direction opposite to the direction in which the opening width of the slot 10 is increased. Thereafter, the shoe component 80 is slid to the reduced position, and the shoe components 80 and 81 are returned to the original state shown in FIG.

  Further, as shown in FIG. 2, wedge 30 is inserted so as to close the opening of slot 10 so that armature coil 9 does not protrude from slot 10. At this time, the wedge 30 presses and fixes the shoe component 80 on the other side in the circumferential direction of the slot 10 to the shoe component 81, and fixes the shoe component 81 on one side in the circumferential direction of the slot 10 to the shoe component 80. Press and fix.

  That is, the shoe components 80 and 81 can be fixed by the wedge 30 which is a component for fixing the armature coil 9. As a result, it is not necessary to separately perform operations such as molding and welding for positioning and fixing the shoe components 80 and 81, and the productivity of the armature 5 can be improved.

Embodiment 2 FIG.
FIG. 8 is a plan view showing a rotating electric machine 100 according to Embodiment 2 of the present invention. FIG. 9 is a partially enlarged view of armature 5 of rotating electric machine 100 according to Embodiment 2 of the present invention. The rotary electric machine 100 according to Embodiment 2 of the present invention has the same structure as rotary electric machine 1 of Embodiment 1 of the present invention except that it has fitting portion 40 and fitting portion 41. .

  Specifically, in the first embodiment, the shoe components 80 and 81 are positioned and fixed using only the wedge 30. On the other hand, in the second embodiment, the fitting portion 40 composed of the convex portion of the shoe component 80 and the concave portion of the shoe component 81, and the concave portion of the magnetic pole teeth 8 and the convex portion of the shoe component 80. The configuration is such that the shoe parts 80 and 81 can be positioned and fixed using the fitting portion 41 further.

  FIG. 10 is a diagram illustrating an operation of the shoe component of armature core 6 of rotating electric machine 100 according to Embodiment 2 of the present invention, and is a diagram when shoe component 80 is slid. FIG. 11 is a diagram for explaining the operation of the shoe component of armature core 6 of rotating electric machine 100 according to Embodiment 2 of the present invention, in which shoe component 80 is slid and then rotated. FIG.

  The armature core 6 of the rotary electric machine 100 according to Embodiment 2 has the same structure as that of Embodiment 1 except that it has the fitting portion 40 and the fitting portion 41 as described above. Have. Therefore, also in the second embodiment, as shown in FIG. 10, similarly to the first embodiment, the shoe component 80 is separated from the shoe component 81 by using the fitting of the elongated hole 12 and the shaft portion 13 as a guide. Can be slid to the enlarged position.

  After the shoe component 80 slides to the enlarged position, the shoe components 80 and 81 can rotate around the shaft portions 13 and 14 as the rotation axis, as shown in FIG. As a result, the opening width of the slot 10 can be increased, and the workability of inserting the armature coil 9 can be improved.

  After the armature coil 9 is inserted into the slot 10, the shoe components 80 and 81 are rotated in the direction opposite to the direction in which the opening width of the slot 10 is increased. Thereafter, the shoe component 80 is slid to the reduced position, and the shoe components 80 and 81 are returned to the original state shown in FIG.

  Here, in the second embodiment, when the sliding operation for returning to the original state is performed, the fitting parts 40 and 41 are fitted together so that when the shoe parts 80 are at the reduced position, the shoe parts 80 and 81 Rotation operation can be fixed. Further, the wedge 30 presses the shoe components 80 and 81, so that the sliding operation of the shoe components 80 can be fixed. As a result, the shoe components 80 and 81 can be positioned and fixed.

  Further, the shoe parts 80, 81 can be fixed only by the fitting parts 40, 41 without relying on the wedge 30, by making the fitting parts 40, 41 light press-fitting, not merely a gap fitting. it can.

  That is, by adopting the configuration as in the second embodiment, the work of inserting the armature coil 9 can be easily performed, and the work of fixing and fixing the shoe parts 80 and 81 is performed separately by molding and welding. No need. For this reason, the productivity of the armature 5 can be improved.

  In the above-described second embodiment, the fitting part 40 is formed by providing the shoe part 80 with the convex part and the shoe part 81 with the concave part. However, the shoe part 80 is provided with the concave part and the shoe part 81 is provided with the convex part. The fitting portion 40 may be configured.

  9 to 11, the fitting portions 40 and 41 are provided on the core pieces 8A and 8B. However, they may be provided on the core pieces 8C and 8D. The corner 15 and the core piece 8E may be provided.

  9 to 11, the fitting portion 41 is provided on the back yoke core piece 7B and the core piece 8A, but may be provided on the back yoke core piece 7B and the core piece 8B or 8D. It may be provided on the contact surface 20 of the piece 7A and the core piece 8F.

Embodiment 3 FIG.
In the first and second embodiments of the present invention, a case has been described in which both the shoe components 80 and 81 are separate components from the magnetic pole teeth 8. On the other hand, in the third embodiment, a case will be described in which the shoe component 81 that does not perform a sliding operation is integrally formed with the magnetic pole teeth 8.

  FIG. 12 is a partially enlarged view of armature 5 of rotating electric machine 100 according to Embodiment 3 of the present invention. As shown in FIG. 12, the shoe component 81 that does not perform a sliding operation can rotate the shoe component 80 even if it has a structure integral with the magnetic pole teeth 8, and can obtain the same effects as those of the first and second embodiments. it can. At this time, the core pieces 8B and 8D have a structure integral with the core piece 7B, the core piece 8F has a structure integral with the core piece 7A, and the shaft portions 13 and 14 are provided on the core pieces 7A and 7B. Structure.

  In the above-described first to third embodiments, as shown in FIG. 5 as an example, the case where the armature core 6 is configured by stacking back yoke core pieces 7A to 7B and core pieces 8A to 8F. explained. However, the present invention is not limited to such a laminated structure. If one or more back yoke core pieces 7A to 7B and one or more core pieces 8A to 8F are used, the number of laminated layers is three or more. The same mechanism and effect can be obtained.

  Further, in the above-described first to third embodiments, the case where the rotating electric machine is of the inner rotor type has been described. However, even in the armature cores of the outer rotor type and the axial gap rotor type rotary electric machines, it is common to provide a claw-shaped shoe extending on both sides in the circumferential direction at the tip end side in the protruding direction of the magnetic pole teeth. Therefore, similar effects can be obtained by using the present invention also for armature cores of various types of rotating electric machines.

  1,100 rotating electric machine, 6 armature core, 7 back yoke, 8 magnetic pole teeth, 9 armature coils, 10 slots, 12 slots, 13 shafts, 14 shafts, 30 wedges, 40 fittings, 41 fittings Part, 80 shoe parts, 81 shoe parts.

Claims (7)

An annular back yoke, and an armature core of a rotating electric machine having a plurality of magnetic pole teeth projecting radially inward from an inner peripheral wall surface of the back yoke,
Each of the plurality of magnetic pole teeth has a claw-shaped shoe that extends on both sides in the circumferential direction at the tip in the protruding direction,
The shoes spreading on both sides in the circumferential direction are configured as two parts of a first shoe part and a second shoe part, which are separate parts separated from the magnetic pole teeth,
The components constituting the back yoke and the magnetic pole teeth, and the two components are configured by stacking and connecting core pieces, which are thin steel plates,
The magnetic pole teeth are provided with a first shaft portion at a protruding portion at the tip,
The first shoe component has a second shaft portion fitted with the first shaft portion,
In the second shoe component, an elongated hole fitted with the second shaft portion is provided in a direction orthogonal to a direction in which the magnetic pole teeth protrude,
The second shoe component is, along the elongated hole, in a direction orthogonal to the direction in which the magnetic pole teeth protrude, a reduced position where the second shoe component is in contact with the first shoe component, and a position away from the first shoe component. It is possible to slide between the enlarged position, and after the sliding movement to the enlarged position, the first shaft portion and the second shaft portion fitted to each other can be rotated around a rotation axis,
The first shoe component has a structure in which, after the second shoe component is slid to the enlarged position, the first shoe component can rotate around the first shaft portion and the second shaft portion fitted to each other as a rotation axis. Armature core of rotating electric machine. An annular back yoke, and an armature core of a rotating electric machine having a plurality of magnetic pole teeth projecting radially inward from an inner peripheral wall surface of the back yoke,
Each of the plurality of magnetic pole teeth has a claw-shaped shoe that extends on both sides in the circumferential direction at the tip in the protruding direction,
The shoes that spread on both sides in the circumferential direction are configured as two parts: a first shoe part formed integrally with the magnetic pole teeth, and a second shoe part that is a separate part separated from the magnetic pole teeth,
The components constituting the back yoke and the magnetic pole teeth, and the two components are configured by stacking and connecting core pieces, which are thin steel plates,
The magnetic pole teeth are provided with a first shaft portion at a protruding portion at the tip,
In the second shoe component, an elongated hole fitted with the first shaft portion is provided in a direction orthogonal to a direction in which the magnetic pole teeth protrude,
The second shoe component is, along the elongated hole, in a direction orthogonal to the direction in which the magnetic pole teeth protrude, a reduced position where the second shoe component is in contact with the first shoe component, and a position away from the first shoe component. An armature core of a rotating electric machine having a structure capable of sliding with an enlarged position, and rotating after the sliding movement to the enlarged position with the first shaft portion as a rotation axis. In a state after the armature coil is inserted into the slot formed between the adjacent magnetic pole teeth, the opening of the slot is closed, and the second shoe component is brought into contact with the first shoe component at the reduced position. The armature core of a rotating electric machine according to claim 1 or 2, further comprising a wedge that is positioned and fixed so as to be in contact therewith. In the reduced position, a first fitting having an uneven shape is formed on a contact surface between the first shoe component and the magnetic pole tooth or on a contact surface between the second shoe component and the magnetic pole tooth. Department is provided,
The first shoe part provided with the first fitting part or the second shoe part provided with the first fitting part is provided with the magnetic pole teeth by the first fitting part in the reduced position. The armature core of the rotating electric machine according to any one of claims 1 to 3, which is positioned and fixed with respect to the armature. The armature core of the rotary electric machine according to claim 4, wherein the first fitting portion has a press-fit structure. A second fitting portion having an uneven shape is provided on a contact surface between the second shoe component and the first shoe component at the reduced position,
The armature core of the rotary electric machine according to any one of claims 1 to 5, wherein the second shoe component is positioned and fixed with respect to the first shoe component by the second fitting portion at the reduced position. . The armature core of the rotary electric machine according to claim 6, wherein the second fitting portion has a press-fit structure.

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