JP6942205B2 - Stator and motor - Google Patents

Description

The present invention relates to a stator composed of a connected laminated iron core and an electric motor provided with the stator.

Conventionally, in electric motors, thin plate-shaped electromagnetic steel sheets punched by a press are laminated, and a laminated iron core integrated by caulking or welding is often used as a stator. Such a stator may not sufficiently satisfy the demand for improved workability when winding the winding. Therefore, a split-type laminated iron core structure has been proposed in which the laminated iron core constituting the stator is divided and a plurality of core blocks having a teeth portion protruding in the inner peripheral radial direction from the back yoke portion are formed in an annular shape. However, when winding the back yoke in a straight line, a winding nozzle is inserted between the teeth to wind the coil, so the conductor is bent at a right angle at the tip of the nozzle, causing distortion due to plastic deformation. , There may be a problem with the alignment of the coil. Therefore, a laminated iron core that forms a notch in the outer peripheral portion of the connecting portion of the back yoke portion has been proposed (see, for example, Patent Document 1). Since the laminated iron core of Patent Document 1 can be expanded to a state in which the back yoke portion is reversely warped, the winding work by the flyer becomes possible, and there is no concern that the tension generated at the time of winding by the nozzle will fluctuate. Therefore, the alignment of the windings can be improved.

JP-A-2002-272027

The laminated iron core described in Patent Document 1 describes an improvement in assembly accuracy when the circumferential ends of a series of connected core blocks are fixed to each other by welding or the like in a state where the divided laminated iron cores are connected. Not. For example, in order to form a laminated iron core in an annular shape, when the peripheral ends of a series of core blocks are fixed by welding or the like, the ends are applied by a load from a jig that holds the outer diameter of the laminated iron core. There is a risk of sticking with each other displaced in the radial direction.

The present invention solves the above-mentioned problems, and in order to form a laminated iron core in an annular shape, it is laminated when the peripheral ends of a series of connected core blocks are fixed by welding or the like. It is an object of the present invention to provide a stator provided with a laminated iron core that prevents the ends from shifting in the radial direction due to a load from a jig that holds the outer diameter of the iron core, and an electric motor provided with the stator.

The stator according to the present invention has a back yoke portion forming the first outer peripheral wall of the laminated iron core and a teeth portion protruding from the back yoke portion, and includes a plurality of core blocks connected to each other to form a series. The laminated iron core is composed of a connecting portion in which a plurality of core blocks are arranged in an annular shape and both ends of a plurality of core blocks connected to each other are connected, and a back yoke portion in the connecting portion. It has a second outer peripheral wall formed inside in the radial direction with respect to the first outer peripheral wall, and a connecting portion is formed at one end of both ends of a plurality of core blocks configured in a series. Is formed with at least one concave portion, and a convex portion fitted with the concave portion is formed at the other end, and is a joint portion between the concave portion and the convex portion when viewed in the stacking direction, and is a laminated iron core. A V having a first side portion located on the outer peripheral side of the above and a second side portion located on the inner peripheral side of the laminated iron core, which is a joint portion between the concave portion and the convex portion, and the tip of which protrudes in the circumferential direction. The second outer peripheral wall has a joint portion formed in a shape, and one end is located on the core block on the convex side and the other end is on the core block on the concave side when viewed in the stacking direction. The laminated iron core is connected to the line L1 connecting the inner diameter side connecting point located on the wall surface where the teeth portion of the back yoke portion protrudes at the connecting portion and one end of the second outer peripheral wall when viewed in the lamination direction. The angle θ1 with the second side of the connecting portion forms an angle of 90 ° ± 5 °, and when viewed in the stacking direction, the line L2 connecting the inner diameter side connecting point and the other end of the second outer peripheral wall, The angle θ2 with the first side of the connecting portion forms an angle of 90 ° ± 5 °.

In the stator according to the present invention, the stator is connected to a line L1 connecting an inner diameter side connecting point located on a wall surface where a tooth portion of a back yoke portion projects at a connecting portion and one end of a second outer peripheral wall. The angle θ1 with the second side of the portion forms an angle of 90 ° ± 5 °. Further, when viewed in the stacking direction, the stator has an angle θ2 between the line L2 connecting the inner diameter side connecting point and the other end of the second outer peripheral wall and the first side of the connecting portion of 90 ° ± 5 °. Make an angle. Therefore, the stator has the first side and the second side of the above configuration with respect to the radial load received by the laminated iron core from the jig that holds the outer circumference of the laminated iron core when the connecting portion is fixed by welding or the like. It constitutes a wall surface that regulates the movement of the end portion of the core block in which the portions are connected in a series. As a result, the stator is removed from the jig that holds the outer diameter of the laminated iron core when the peripheral ends of the core blocks connected in series to form the laminated iron core in an annular shape are fixed by welding or the like. It is possible to suppress the radial deviation between the ends due to the load of.

It is a top view of the stator which concerns on Embodiment 1 of this invention. It is a top view of the laminated iron core which comprises the stator which concerns on Embodiment 1 of this invention. It is a block diagram of the core block of FIG. It is a schematic diagram of the connecting part of the core piece constituting the core block of FIG. It is a top view of a part of the laminated iron core which constitutes the stator of FIG. It is an enlarged view of the connecting part of the laminated iron core which constitutes the stator of FIG. It is an enlarged view explaining the structure of the connection part of FIG. It is an enlarged view explaining the modification of the connection part of FIG. It is a top view of a part of the laminated iron core which constitutes the stator according to Embodiment 2 of this invention. It is an enlarged view of the connecting part of the laminated iron core which constitutes the stator of FIG. It is sectional drawing which shows the sticking state of the stator and the housing which concerns on Embodiment 3 of this invention. It is a top view of the electric motor using the stator according to Embodiment 4 of this invention.

Hereinafter, the stator according to the embodiment of the present invention will be described with reference to the drawings and the like. In the following drawings including FIG. 1, the relative dimensional relationships and shapes of the constituent members may differ from the actual ones. Further, in the following drawings, those having the same reference numerals are the same or equivalent thereof, and this shall be common to the entire text of the specification. In addition, terms that indicate directions (for example, "top", "bottom", "right", "left", "front", "rear", etc.) are used as appropriate for ease of understanding. For convenience of explanation, it is described as such, and does not limit the arrangement and orientation of the device or component. Further, the "plan view" used in the following description is a view when the object is viewed in the stacking direction of the laminated iron core 1.

Embodiment 1.
[Stator 30]
FIG. 1 is a plan view of the stator 30 according to the first embodiment of the present invention. The stator 30 has a laminated iron core 1 and a winding 2 arranged on the laminated iron core 1 via an insulating member.

[Laminated iron core 1]
FIG. 2 is a plan view of the laminated iron core 1 constituting the stator 30 according to the first embodiment of the present invention. The laminated iron core 1 has a back yoke portion 6 constituting the first outer peripheral wall 1a of the laminated iron core 1 and a teeth portion 7 protruding from the back yoke portion 6, and is connected to each other to form a series of a plurality of core blocks. It has 20. In FIG. 2, a total of nine core blocks 20 are arranged in an annular shape, but if the laminated iron core 1 can be configured in an annular shape, the total number of core blocks 20 may be 8 or less, and 10 or more. You may. In the laminated iron core 1, the back yoke portion 6 is arranged in a cylindrical shape. As shown in FIG. 1, the laminated iron core 1 has a winding 2 wound around a tooth portion 7 via an insulating material (not shown) in a concentrated winding manner.

FIG. 3 is a block diagram of the core block 20 of FIG. FIG. 4 is a schematic view of a connecting portion of the core pieces 5 constituting the core block 20 of FIG. The core block 20 will be described with reference to FIGS. 2 to 4. As shown in FIG. 2, the core block 20 has a back yoke portion 6 arranged on the outer peripheral portion of the laminated iron core 1 and a laminated iron core from the center of the back yoke portion 6 in the circumferential direction when viewed in the laminating direction of the laminated iron core 1. It has a substantially T-shaped tooth portion 7 protruding inward in the radial direction of 1. As shown in FIG. 3, the core block 20 is formed by laminating a first core member 3 and a second core member 4. Note that FIG. 3 schematically shows a part of the laminated structure of the core block 20. As shown in FIG. 4, the first core member 3 and the second core member 4 are composed of a core piece 5 made of a steel plate made of a magnetic material. The magnetic material is, for example, iron. The first core member 3 is a member arranged in a band shape by connecting the first end surface 5d and the second end surface 5f of the plurality of core pieces 5 shown in FIG. The second core member 4 is a member in which the core pieces 5 are alternately arranged in the longitudinal direction from the first core member 3. The core block 20 is rotatably formed by alternately stacking the first core member 3 and the second core member 4, and fitting the concave portions 5b and the convex portions 5c of the core pieces 5 adjacent to each other in the stacking direction. It is connected. The core block 20 can be arranged in an annular shape by rotating the concave portion 5b and the convex portion 5c of each core piece 5.

The core piece 5 is a steel plate made of a magnetic material, and the edge portion forming the first outer peripheral wall 1a of the laminated iron core 1 is formed in an arc shape. Further, in the core piece 5, the teeth portion 7 protrudes from the edge portion on the inner peripheral side of the laminated iron core 1 located at the center of the core piece 5 in the circumferential direction of the laminated iron core 1. Further, as shown in FIGS. 2 and 4, the core piece 5 has a recess as a connecting means on the back surface of one end portion forming the first end surface 5d of the core piece 5 in the circumferential direction of the laminated iron core 1. 5b and the convex portion 5c are formed. The first end surface 5d of the core piece 5 is formed in an arc shape centered on these concave portions 5b and convex portions 5c. A second end surface 5f is formed at the other end of the core piece 5. The second end surface 5f is fitted with the first end surface 5d of the adjacent core pieces 5. In the laminated iron core 1, the ends of the core pieces 5 facing each other via the concave portion 5b and the convex portion 5c of the core pieces 5 constituting the laminated first core member 3 and the second core member 4 are staggered. It is arranged so that it overlaps with. The laminated iron core 1 is formed in an annular shape by rotating the concave portion 5b and the convex portion 5c of each core piece 5 constituting the laminated first core member 3 and the second core member 4.

[Connecting part 10]
FIG. 5 is a plan view of a part of the laminated iron core 1 constituting the stator 30 of FIG. FIG. 6 is an enlarged view of the connecting portion 10 of the laminated iron core 1 constituting the stator 30 of FIG. FIG. 7 is an enlarged view illustrating the configuration of the connecting portion 10 of FIG. The laminated iron core 1 has a connecting portion 10. As shown in FIG. 5, the connecting portion 10 is located at both ends of the plurality of core blocks 20 which are connected to each other and are formed in a series when the plurality of connected core blocks 20 are arranged in an annular shape. This is a portion where the core end portion 8 and the core end portion 9 are connected. The connecting portion 10 is configured by fitting the uneven shapes formed on the core end portion 8 and the core end portion 9.

At both ends of a plurality of core blocks 20 formed in a series, the connecting portion 10 has at least one recess 9a formed in one core end 9 and a recess 9a in the other core end 8. A convex portion 8a to be fitted is formed. As shown in FIG. 6, the convex portion 8a of the core end portion 8 is formed by the convex side first side wall portion 16a and the convex side second side wall portion 17a when viewed in the stacking direction of the laminated iron core 1 and is the circumference of the laminated iron core 1. It is formed in a V shape with the tip protruding in the direction. Further, as shown in FIG. 6, the convex portion 8a of the core end portion 8 has the central portion most protruding in the radial direction of the laminated iron core 1 when viewed in the laminating direction of the laminated iron core 1.

As shown in FIG. 6, the concave portion 9a of the core end portion 9 is formed by the concave side first side wall portion 16b and the concave side second side wall portion 17b in the circumferential direction of the laminated iron core 1 when viewed in the laminating direction of the laminated iron core 1. It is formed by denting in a V shape. Further, as shown in FIG. 6, the concave portion 9a of the core end portion 9 has the most concave central portion in the radial direction of the laminated iron core 1 when viewed in the laminating direction of the laminated iron core 1.

There is one convex portion 8a and one concave portion 9a formed on the core end portion 8 and the core end portion 9. The number of the convex portions 8a and the concave portions 9a may be the same, and the number of the convex portions 8a and the concave portions 9a is not limited to one, and two or more sets may be formed.

As shown in FIG. 6, the connecting portion 10 is a portion in which one convex portion 8a formed on the core end portion 8 and one concave portion 9a formed on the core end portion 9 are fitted together. The connecting portion 10 is a joint portion between the concave portion 9a and the convex portion 8a when viewed in the stacking direction of the laminated iron core 1, and is a first side portion 16 located on the outer peripheral side of the laminated iron core 1, and the concave portion 9a and the convex portion 8a. It has a second side portion 17 which is a joint portion of the above and is located on the inner peripheral side of the laminated iron core 1. The connecting portion 10 has a joint portion 10a formed in a V shape in which the tip protrudes in the circumferential direction by the first side portion 16 and the second side portion 17 when viewed in the laminating direction of the laminated iron core 1. Although the connecting portion 10 has one joint portion 10a as shown in FIG. 6, the connecting portion 10 is not limited to a configuration having only one joint portion 10a, and the connecting portion 10a is not limited to a configuration having only one joint portion 10a. You may have two or more. The first side portion 16 of the connecting portion 10 is a joint portion between the convex side first side wall portion 16a of the convex portion 8a and the concave side first side wall portion 16b of the concave portion 9a. This is a portion in which the convex side first side wall portion 16a of the convex portion 8a and the concave side first side wall portion 16b of the concave portion 9a are in linear contact with each other. The convex side first side wall portion 16a of the convex portion 8a and the concave side first side wall portion 16b of the concave portion 9a are wall portions forming a slope with respect to the radial direction of the laminated iron core 1 when viewed in the laminating direction of the laminated iron core 1. be. The second side portion 17 of the connecting portion 10 is a joint portion between the convex side second side wall portion 17a of the convex portion 8a and the concave side second side wall portion 17b of the concave portion 9a. This is a portion in which the convex side second side wall portion 17a of the convex portion 8a and the concave side second side wall portion 17b of the concave portion 9a are in linear contact with each other. The convex side second side wall portion 17a of the convex portion 8a and the concave side second side wall portion 17b of the concave portion 9a are wall portions forming a slope with respect to the radial direction of the laminated iron core 1 when viewed in the laminating direction of the laminated iron core 1. be.

In the connecting portion 10, the portion of the laminated iron core 1 located on the inner peripheral wall 1b is referred to as an inner diameter side connecting point 14 when viewed in the laminating direction of the laminated iron core 1, and the portion located on the outer peripheral wall of the laminated iron core 1 is connected on the outer diameter side. It is referred to as point 15. The outer diameter side connecting point 15 is a connecting portion between the core end portion 8 and the core end portion 9 when viewed in the stacking direction of the laminated iron core 1, and is the second outer peripheral wall 11 or the third outer peripheral wall of the laminated iron core 1, which will be described later. It is a part located at 12. The outer diameter side connecting point 15 is a portion to be welded when connecting the core end portion 8 and the core end portion 9 and fixing the connecting portion 10. The inner diameter side connecting point 14 is a connecting portion between the core end portion 8 and the core end portion 9 when viewed in the stacking direction of the laminated iron core 1, and is a portion of the back yoke portion 6 located on the wall surface 6a where the teeth portion 7 protrudes. Is. The wall surface 6a of the back yoke portion 6 constitutes the inner peripheral wall 1b of the laminated iron core 1. The inner diameter side connecting point 14 and the outer diameter side connecting point 15 are defined for each cross section in the direction perpendicular to the stacking direction of the laminated iron core 1.

[Second outer wall 11 and third outer wall 12]
As shown in FIG. 7, the laminated iron core 1 has a second outer peripheral wall 11 formed in the connecting portion 10 on the inner side in the radial direction with respect to the first outer peripheral wall 1a formed by the back yoke portion 6. The second outer peripheral wall 11 forms an outer peripheral wall having a diameter smaller than that of the first outer peripheral wall 1a of the laminated iron core 1, and is formed to be recessed with respect to the wall surface of the first outer peripheral wall 1a of the laminated iron core 1. Further, the second outer peripheral wall 11 is formed along the stacking direction of the laminated iron core 1. The second outer peripheral wall 11 has one end 13a located at the core block 20 on the convex portion 8a side and the other end 13b located at the core block 20 on the concave 9a side when viewed in the laminating direction of the laminated iron core 1. do.

As shown in FIG. 7, the laminated iron core 1 has a third outer peripheral wall 12 formed in the connecting portion 10 on the inner side in the radial direction with respect to the first outer peripheral wall 1a formed by the back yoke portion 6. The third outer peripheral wall 12 forms an outer peripheral wall having a diameter smaller than that of the first outer peripheral wall 1a of the laminated iron core 1, and is formed to be recessed with respect to the wall surface of the first outer peripheral wall 1a of the laminated iron core 1. Further, the third outer peripheral wall 12 is formed in the connecting portion 10 on the inner side in the radial direction with respect to the second outer peripheral wall 11 formed by the back yoke portion 6. The third outer peripheral wall 12 forms an outer peripheral wall having a diameter smaller than that of the second outer peripheral wall 11 of the laminated iron core 1, and is formed to be recessed with respect to the wall surface of the second outer peripheral wall 11 of the laminated iron core 1. The second outer peripheral wall 11 has a concave shape wider than the third outer peripheral wall 12 in the laminating direction of the laminated iron core 1, and the third outer peripheral wall 12 is the second outer peripheral wall 11 in the circumferential direction of the laminated iron core 1. It is formed between one end 13a and the other end 13b. The third outer peripheral wall 12 is formed along the stacking direction of the laminated iron core 1. The third outer peripheral wall 12 has one end 12a located at the core block 20 on the convex portion 8a side and the other end 12b located at the core block 20 on the concave 9a side when viewed in the laminating direction of the laminated iron core 1. do.

The second outer peripheral wall 11 and the third outer peripheral wall 12 are formed on the outer diameter side of the laminated iron core 1 with respect to the connecting portion 10 when viewed in the laminating direction of the laminated iron core 1, and are formed on the outer diameter side as described above. The connecting point 15 is located on the second outer peripheral wall 11 or the third outer peripheral wall 12 that constitutes the outer peripheral wall of the laminated iron core 1.

[Relationship between the connecting portion 10 and the second outer peripheral wall 11]
As shown in FIG. 7, when viewed in the stacking direction, the inner diameter side connecting point 14 located on the wall surface 6a where the teeth portion 7 of the back yoke portion 6 protrudes from the connecting portion 10 and one end of the second outer peripheral wall 11 Let the line L1 connect with 13a. The laminated iron core 1 has an angle θ1 between the wire L1 and the second side portion 17 of the connecting portion 10 of 90 ° ± 5 °.

As shown in FIG. 7, when viewed in the stacking direction, the inner diameter side connecting point 14 located on the wall surface 6a where the teeth portion 7 of the back yoke portion 6 protrudes from the connecting portion 10 and the other end portion of the second outer peripheral wall 11 Let the line L2 connect with 13b. In the laminated iron core 1, the angle θ2 between the wire L2 and the first side portion 16 of the connecting portion 10 forms an angle of 90 ° ± 5 °.

FIG. 8 is an enlarged view illustrating a modified example of the connecting portion 10 of FIG. The connecting portion 10 shown in FIG. 8 has a plurality of joining portions 10a. The connecting portion 10 shown in FIG. 8 has two sets of convex portions 8a and concave portions 9a. As shown in FIG. 8, the connecting portion 10 is a portion in which two convex portions 8a formed on the core end portion 8 and two concave portions 9a formed on the core end portion 9 are fitted together. The connecting portion 10 is a joint portion between the two concave portions 9a and the two convex portions 8a when viewed in the laminating direction of the laminated iron core 1, and each joint portion 10a is a first side portion located on the outer peripheral side of the laminated iron core 1. It has 16 and a second side portion 17 located on the inner peripheral side of the laminated iron core 1. The connecting portion 10 has two joint portions 10a formed in a V shape in which the tip protrudes in the circumferential direction by the first side portion 16 and the second side portion 17 when viewed in the laminating direction of the laminated iron core 1. .. The connecting portion 10 of the laminated iron core 1 shown in FIG. 8 has two joint portions 10a formed in this V shape in the radial direction of the laminated iron core 1.

As described above, the stator 30 is a line connecting the inner diameter side connecting point 14 located on the wall surface 6a where the teeth portion 7 of the back yoke portion 6 protrudes from the connecting portion 10 and one end portion 13a of the second outer peripheral wall 11. The angle θ1 between L1 and the second side portion 17 of the connecting portion 10 forms an angle of 90 ° ± 5 °. Further, the stator 30 has an angle θ2 between the line L2 connecting the inner diameter side connecting point 14 and the other end 13b of the second outer peripheral wall 11 and the first side portion 16 of the connecting portion 10 when viewed in the stacking direction. Make an angle of 90 ° ± 5 °. The stator 30 has a first side portion 16 having the above configuration with respect to a radial load received by the laminated iron core 1 from a jig that holds the outer periphery of the laminated iron core 1 when the connecting portion 10 is fixed by welding or the like. The second side portion 17 constitutes a wall surface that regulates the movement of the end portion of the core block 20. As a result, the stator 30 retains the outer diameter of the laminated iron core 1 when the peripheral ends of the core blocks 20 connected in series to form the laminated iron core 1 in an annular shape are fixed by welding or the like. It is possible to suppress the radial deviation of the ends due to the load from the jig.

Further, in general, the stator 30 affects the fixing of the annular shape of the core block 20 depending on the shape of the connecting portion 10, and the shape of the inner and outer diameters when the laminated iron core 1 is formed in an annular shape deteriorates. , May cause motor noise. The stator 30 is a jig that holds the outer diameter of the laminated iron core 1 when the peripheral ends of the core blocks 20 connected in series to form the laminated iron core 1 in an annular shape are fixed by welding or the like. It is possible to suppress the radial deviation between the ends due to the load from. As a result, the stator 30 can suppress the generation of motor noise.

Further, in the stator 30, the connecting portion 10 has a plurality of joining portions 10a. The stator 30 includes a plurality of first side portions 16 and a plurality of stators 30 with respect to a radial load received by the laminated iron core 1 from a jig that holds the outer periphery of the laminated iron core 1 when the connecting portion 10 is fixed by welding or the like. The second side portion 17 of the core block 20 constitutes a plurality of wall surfaces that regulate the movement of the end portion of the core block 20. As a result, the stator 30 retains the outer diameter of the laminated iron core 1 when the peripheral ends of the core blocks 20 connected in series to form the laminated iron core 1 in an annular shape are fixed by welding or the like. It is possible to suppress the radial deviation of the ends due to the load from the jig.

Embodiment 2.
FIG. 9 is a plan view of a part of the laminated iron core 1A constituting the stator 30A according to the second embodiment of the present invention. FIG. 10 is an enlarged view of the connecting portion 10A of the laminated iron core 1A constituting the stator 30A of FIG. The parts having the same configuration as the stator 30 in FIGS. 1 to 8 are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 10, the connecting portion 10A has a portion in which a convex portion 8a formed on the core end portion 8 and a concave portion 9a formed on the core end portion 9 are fitted. The connecting portion 10A is a joint portion between the concave portion 9a and the convex portion 8a when viewed in the stacking direction of the laminated iron core 1A, and is a first side portion 16 located on the outer peripheral side of the laminated iron core 1A, and the concave portion 9a and the convex portion 8a. It has a second side portion 17 which is a joint portion of the above and is located on the inner peripheral side of the laminated iron core 1A. The connecting portion 10A has a V-shaped joint portion 10Aa whose tip protrudes in the circumferential direction by the first side portion 16 and the second side portion 17 when viewed in the laminating direction of the laminated iron core 1A. As shown in FIG. 10, the connecting portion 10A has one joint portion 10Aa, but the connecting portion 10A is not limited to a configuration having only one joint portion 10Aa, and the connecting portion 10Aa is not limited to the configuration having only one joint portion 10Aa. May have two or more. The first side portion 16 of the connecting portion 10A is a joint portion between the convex side first side wall portion 16a of the convex portion 8a and the concave side first side wall portion 16b of the concave portion 9a. This is a portion in which the convex side first side wall portion 16a of the convex portion 8a and the concave side first side wall portion 16b of the concave portion 9a are in linear contact with each other. The convex side first side wall portion 16a of the convex portion 8a and the concave side first side wall portion 16b of the concave portion 9a are wall portions forming a slope with respect to the radial direction of the laminated iron core 1 when viewed in the laminating direction of the laminated iron core 1. be. The second side portion 17 of the connecting portion 10A is a joint portion between the convex side second side wall portion 17a of the convex portion 8a and the concave side second side wall portion 17b of the concave portion 9a. This is a portion in which the convex side second side wall portion 17a of the convex portion 8a and the concave side second side wall portion 17b of the concave portion 9a are in linear contact with each other. The convex side second side wall portion 17a of the convex portion 8a and the concave side second side wall portion 17b of the concave portion 9a are wall portions forming a slope with respect to the radial direction of the laminated iron core 1 when viewed in the laminating direction of the laminated iron core 1. be. In the connecting portion 10A, the portion located on the inner peripheral wall 1b of the laminated iron core 1A is referred to as the inner diameter side connecting point 14 when viewed in the laminating direction of the laminated iron core 1A, and the portion located on the outer peripheral wall of the laminated iron core 1A is connected on the outer diameter side. It is referred to as point 15.

The connecting portion 10A has a linearly shaped portion 18 which is a joint portion between the concave portion 9a and the convex portion 8a between the end portion of the first side portion 16 and the third outer peripheral wall 12. The linear shape portion 18 extends linearly in the radial direction of the laminated iron core 1A. The linear shape portion 18 of the connecting portion 10A is a joint portion between the convex side straight wall portion 18a of the convex portion 8a and the concave side straight wall portion 18b of the concave portion 9a, and is a convex side straight line when viewed in the stacking direction of the laminated iron core 1A. This is a portion where the wall portion 18a and the concave straight wall portion 18b of the recess 9a are in linear contact with each other. The convex-side straight wall portion 18a is a wall portion located between the convex-side first side wall portion 16a and the third outer peripheral wall 12 at the core end portion 8. The concave straight wall portion 18b is a wall portion located between the concave first side wall portion 16b and the third outer peripheral wall 12 at the core end portion 9.

As described above, in the stator 30A, the connecting portion 10A is a linear portion 18 in which the connecting portion 10A is a joint portion between the concave portion 9a and the convex portion 8a between the end portion of the first side portion 16 and the third outer peripheral wall 12. Has. In the stator 30A, since the end portion of the first side portion 16 and the outer diameter side connecting point 15 are connected by the linear shape portion 18 formed in the radial direction of the laminated iron core 1A, the connecting portion 10A is connected. When fixing by welding, the filler metal easily penetrates into the inner diameter side of the laminated iron core 1A. Therefore, the stator 30A can improve the fixing force when the connecting portion 10A is fixed by welding, so that the rigidity of the connecting portion 10A can be improved.

Embodiment 3.
FIG. 11 is a cross-sectional view showing a fixed state of the stator 30B and the housing 40 according to the third embodiment of the present invention. The parts having the same configuration as the stator 30 and the stator 30A in FIGS. 1 to 10 are designated by the same reference numerals, and the description thereof will be omitted. The stator 30B shown in FIG. 11 is the stator 30 of the first embodiment or the stator 30A of the second embodiment.

The housing 40 is made of a magnetic material, and its inner diameter is smaller than the outer diameter of the laminated iron core 1 or the laminated iron core 1A. The housing 40 is, for example, a housing for an electric motor. The laminated iron core 1 or the laminated iron core 1A and the housing 40 are fixed by shrink fitting. The inner peripheral wall 40a of the housing 40 comes into contact with the laminated iron core 1 or the first outer peripheral wall 1a of the laminated iron core 1A. A gap is formed between the inner peripheral wall 40a of the housing 40 and the second outer peripheral wall 11 and the third outer peripheral wall 12.

As described above, in the stator 30B, the inner peripheral wall 40a of the housing 40 comes into contact with the laminated iron core 1 or the first outer peripheral wall 1a of the laminated iron core 1A. Further, in the stator 30B, a gap is formed between the inner peripheral wall 40a of the housing 40 and the second outer peripheral wall 11 and the third outer peripheral wall 12. Therefore, the stator 30B can avoid the load directly applied from the housing 40 to the connecting portion 10 of the laminated iron core 1 at the time of shrink fitting, and can be applied to the connecting portion 10 of the laminated iron core 1 having a weaker rigidity than other portions. Stress concentration can be suppressed. Similarly, the stator 30B can avoid the load directly applied from the housing 40 to the connecting portion 10A of the laminated iron core 1 at the time of shrink fitting, and to the connecting portion 10A of the laminated iron core 1 having a weaker rigidity than other portions. Stress concentration can be suppressed. As a result, the stator 30B can prevent deterioration of iron loss caused by stress concentration on the connecting portion 10 or the connecting portion 10A due to the load applied from the housing 40 made of the magnetic material.

Embodiment 4.
FIG. 12 is a plan view of the motor 60 using the stator 30C according to the fourth embodiment of the present invention. The parts having the same configuration as the stator 30 and the stator 30A in FIGS. 1 to 11 are designated by the same reference numerals, and the description thereof will be omitted. The stator 30C shown in FIG. 12 is the stator 30 of the first embodiment or the stator 30A of the second embodiment. The electric motor 60 has a stator 30C and a rotor 50. The rotor 50 has a magnet 51 and the stator 30C has a winding 2. The electric motor 60 is a permanent magnet type electric motor, but may be another type of electric motor such as an electromagnet type, a reluctance type, or a hysteris type.

As described above, the electric motor 60 includes the stator 30 according to the first embodiment or the stator 30A according to the second embodiment, whereby the stator 30 according to the first embodiment or the fixing according to the second embodiment is provided. An electric motor 60 having the effect of the child 30A can be obtained.

The embodiment of the present invention is not limited to the above-described first to fourth embodiments, and various modifications can be made. For example, in the first and second embodiments, the core blocks 20 connected in series are connected by the convex portions 5c and the concave portions 5b provided on the core piece 5 to be rotatable. However, the connection of the core block 20 is not limited to the configuration, and for example, a through hole may be formed in the core piece 5 and a pin may be passed through the through hole so that the core block 20 can be rotated. The connection of the core blocks 20 constituting the laminated iron core 1 is not limited to the above configuration, and various well-known configurations may be used.

1 Laminated iron core, 1A Laminated iron core, 1a 1st outer peripheral wall, 1b inner peripheral wall, 2 windings, 3 1st core member, 4th 2nd core member, 5 core piece, 5b concave, 5c convex, 5d 1st end face, 5f 2nd end face, 6 back yoke part, 6a wall surface, 7 teeth part, 8 core end part, 8a convex part, 9 core end part, 9a concave part, 10 connection part, 10A connection part, 10Aa joint part, 10a joint part, 11 2nd outer wall, 12 3rd outer wall, 12a end, 12b end, 13a end, 13b end, 14 inner diameter side connection point, 15 outer diameter side connection point, 16 first side, 16a convex side 1st side wall part, 16b concave side 1st side wall part, 17 2nd side part, 17a convex side 2nd side wall part, 17b concave side 2nd side wall part, 18 straight shape part, 18a convex side straight wall part, 18b concave side Straight wall, 20 core block, 30 stator, 30A stator, 30B stator, 30C stator, 40 housing, 40a inner wall, 50 rotor, 51 magnet, 60 motor.

Claims (6)

It has a back yoke portion forming the first outer peripheral wall of the laminated iron core and a teeth portion protruding from the back yoke portion, and includes a plurality of core blocks connected to each other to form a series.
The laminated iron core is
A connecting portion in which the plurality of core blocks are arranged in an annular shape and both ends of the plurality of core blocks connected to each other are connected to each other.
In the connecting portion, a second outer peripheral wall formed inside the first outer peripheral wall formed by the back yoke portion in the radial direction, and
Have,
The connecting portion
At both ends of the plurality of core blocks configured in the series, at least one concave portion is formed at one end, and a convex portion fitted with the concave portion is formed at the other end. With
When viewed in the stacking direction, it is a joint between the concave portion and the convex portion and is a first side portion located on the outer peripheral side of the laminated iron core, and is a joint portion between the concave portion and the convex portion and is inside the laminated iron core. It has a second side portion located on the circumferential side, and has a V-shaped joint portion whose tip protrudes in the circumferential direction.
The second outer wall is
When viewed in the stacking direction, one end is located on the core block on the convex side, and the other end is located on the core block on the concave side.
The laminated iron core is
When viewed in the stacking direction, the line L1 connecting the inner diameter side connecting point located on the wall surface where the teeth portion of the back yoke portion projects in the connecting portion and one end of the second outer peripheral wall, and the connecting portion. The angle θ1 with the second side of the above is 90 ° ± 5 °.
When viewed in the stacking direction, the angle θ2 between the line L2 connecting the inner diameter side connecting point and the other end of the second outer peripheral wall and the first side of the connecting portion is an angle of 90 ° ± 5 °. A stator. The connecting portion further has a third outer peripheral wall formed inside in the radial direction with respect to the second outer peripheral wall.
The third outer wall is
The stator according to claim 1, wherein one end is located in the core block on the convex side and the other end is located in the core block on the concave side when viewed in the stacking direction. The connecting portion
A linear portion which is a joint portion between the concave portion and the convex portion is provided between the end portion of the first side portion and the third outer peripheral wall.
The stator according to claim 2, wherein the linear portion extends linearly in the radial direction of the laminated iron core. The stator according to any one of claims 1 to 3, wherein the connecting portion has a plurality of the joint portions. The stator according to any one of claims 1 to 4, wherein a housing made of a magnetic material and the first outer peripheral wall are shrink-fitted into the housing.
Motor equipped with. A rotor with a magnet and
The stator according to any one of claims 1 to 4, and the stator.
Motor equipped with.

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