JP3782531B2 - Motor stator and motor frame - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a stator of a motor constituted by a stator core having a plurality of teeth and windings wound around the teeth of the stator core.
[0002]
[Prior art]
Conventional examples of conventional stators and motor frames will be described with reference to FIGS. FIG. 7 is a plan view of a conventional punched plate. FIG. 8 is a diagram for explaining a method of bending the punched plate of FIG. FIG. 9 is a front view of a conventional stator. FIG. 10 is a partially enlarged view of the back yoke viewed from the axial center portion of the conventional stator core.
[0003]
In FIG. 7, the punching plate 15 is formed by punching a hoop material 16 made of a steel plate. The punching plate 15 includes a back yoke 17 formed in a strip shape and a plurality of teeth 18 extending vertically from the long side portion 17 a side of the back yoke 17. Further, on the long side portion 17a side of the back yoke 17, a cut portion 19 is provided at an arbitrary position between the teeth and the teeth adjacent to the teeth.
[0004]
By the vent plate 15 to the shape as described above, it is possible to suppress the amount of waste of the hoop material 16 after punching the vent plate 15. In other words, the punching plate 15 is fitted and punched so that the tooth 18 of the other punching plate 15 is disposed in the slot portion 20 which is a space between the teeth. In addition, the hoop material 16 of the slot portion 20 can be used effectively.
[0005]
In FIG. 8, the stator core 21 is configured by stacking the punched plates 15. Then, a winding 22 is wound around each tooth 18 of the stator core 21, and the back yoke 17 is bent in a direction in which the teeth 18 are directed toward the axial center with a notch 19 provided in the back yoke 17 as a fulcrum. To go. Then, the back yoke 17 is formed in a ring shape, and both ends of the back yoke 17 are fixed by an adhesive or welding. Alternatively, the stator core 21 is fixed when it is molded with premix or resin. Further, the cut angle of the V-shaped cut portion 19 is an angle at which the inclined surfaces 19a and 19b facing the cut portion 19 can contact each other when the back yoke 17 is formed in a ring shape.
[0006]
In FIG. 9, as described above, the back yoke 17 is bent and both ends of the back yoke are fixed. Thereby, the inner rotor type stator 23 is formed. If there is a possibility that the windings 22 wound around the teeth 18 may come into contact with each other, an insulating material 24 is inserted between the windings 22.
[0007]
[Problems to be solved by the invention]
When one kind of punching plate 15 is stacked as in the conventional example described above, the contact portions of the cut portions 19 are arranged in the same straight line as shown in FIG.
[0008]
Further, for example, if a gap is generated in the cut portion after the punching plate 15 is bent, a space is created in the middle of the magnetic path in the back yoke. In the conventional structure, it is necessary to pass through this space. This increases the magnetic resistance.
[0009]
[Means for Solving the Problems]
Therefore, according to the present invention, a back yoke formed in a strip shape , a plurality of teeth extending vertically from one long side of the back yoke, and a long side portion of the back yoke from which these teeth extend Side, a first punching plate having a V-shaped notch formed at an arbitrary position between the teeth and the teeth adjacent to the teeth, a back yoke formed in a band shape, and one of the back yokes There are a plurality of teeth extending vertically from the long side of the back and the long side of the back yoke from which the teeth extend, and are located at any place between the teeth and the teeth adjacent to the teeth. And a second punching plate having a V-shaped cut portion provided at a different location from the first punching plate, and V of the first punching plate and the second punching plate. The fulcrum part of the character-shaped notch is Without the midpoint of the side of the teeth, the the first punching plate and the second punching plate, and a supporting point a V-shaped notch portion provided on each of the back yoke, teeth in the axial center direction Each back yoke is bent into a ring shape in the facing direction to form a first core plate and a second core plate, and the first core plate and the second core plate are formed one by one or arbitrarily. A stator for a motor is provided in which a stator core is formed by alternately laminating each number of the cores, and a magnetic resistance is reduced by winding a winding around the teeth of the stator core.
[0010]
Furthermore, a motor frame is provided in which the stator of the motor is molded by resin or premix to cover the outer periphery of the stator .
[0011]
[Action]
A first punching plate and a second punching plate provided with V-shaped notches at different positions are formed in a ring shape to form a first core plate and a second core plate, respectively. Then, the first core plate and the second core plate are alternately stacked one by one or every arbitrary number to form the stator core, and the stator is formed by winding the winding around the teeth. To do.
[0012]
Then, when forming the first core plate or the second core plate, if a gap is formed without contact between the inclined surfaces facing the cut portions, or if a gap is created by design, this Magnetism flowing through the core plate with a gap flows through the core plates stacked above and below the core plate.
[0013]
【Example】
Embodiments of a stator and a motor frame according to the present invention will be described with reference to FIGS. FIG. 1 is a plan view of a first punched plate according to the present invention. FIG. 2 is a plan view of a second punched plate according to the present invention. FIG. 3 is a plan view of the first punched plate after being formed into a ring shape. FIG. 4 is a plan view of the second punched plate after being formed into a ring shape. FIG. 5 is a front view of the stator according to the present invention. FIG. 6 is a partially enlarged view of the back yoke as viewed from the axial center portion of the stator.
[0014]
In FIG. 1, a first punching plate 1 includes a back yoke 2 formed in a strip shape in the same manner as the punching plate in the conventional example, and a plurality of vertically extending from the long side portion 2 a side of the back yoke 2. It is composed of teeth 3. Further, on one long side 2a side of the back yoke 2, a cut portion 4 is provided at an arbitrary position between an arbitrary tooth and a tooth adjacent to the tooth.
[0015]
In FIG. 2, the second punching plate 5 is composed of a back yoke 6 and teeth 7, similarly to the first punching plate 1. Further, similarly to the first punching plate 1, a cut portion 8 is provided at an arbitrary place between an arbitrary tooth and a tooth adjacent to this tooth on the one long side portion 6 a side of the back yoke 6. ing. The location where the cut portion 8 is provided is provided at a location different from the location of the cut portion 4 provided in the first punching plate 1.
[0016]
3 and 4, the teeth are pivoted with the notches 4 and 8 provided in the back yokes 2 and 6 provided in the first extraction plate 1 and the second extraction plate 5 respectively as fulcrums. The back yokes 2 and 6 are bent in a direction toward the center direction to form a ring shape. Then, both ends of each of the back yokes 2 and 6 are fixed by an adhesive or welding to form a first core plate 9 and a second core plate 10 respectively.
[0017]
In FIG. 5, the stator 11 includes a stator core 12 formed by alternately laminating the first core plate 9 and the second core plate 10 one by one or every arbitrary number of sheets. The winding 13 is wound around the teeth of the stator core 12.
[0018]
In FIG. 6, the first core plate 9 and the second core plate 10 are stator cores that are alternately stacked every two sheets. And the contact parts 4a and 8a of the notch parts 4 and 8 of the 1st core board 9 and the 2nd core board 10 are arranged in zigzag form.
[0019]
And when forming the 1st core board 9 or the 2nd core board 10, when the clearance gap 14 produced without the slope which the notch parts 4 and 8 oppose, or a certain amount of clearance gap in design When 14 is generated, the magnetism flowing through the core plate in which the gap 14 is generated can flow around the core plates stacked on the top and bottom of the core plate to form a magnetic path.
[0020]
In addition, if a certain amount of gap 14 is generated in the design, the angle of the gap can be added to the cut angle of the V-shaped cut portion, and the dimensional tolerance of the cut angle of the cut portion can be provided with a margin. Can be determined.
[0021]
In this embodiment, when the first punching plate 1 and the second punching plate 5 are formed in a ring shape with reference to the inner peripheral portion of the stator, that is, with respect to the tip end portion of the teeth, the dimensional accuracy of the outer peripheral portion. Will get worse.
[0022]
That is, even if the stator is inserted into a conventional steel plate motor frame and the motor is assembled, the dimensional accuracy of the outer periphery of the stator in the present invention is poor, so the outer periphery of the stator is used as a reference. It becomes difficult to assemble the motor. That is, the mounting accuracy of a bearing or the like mounted on the motor frame is deteriorated. Therefore, the motor frame is formed by molding the stator with resin or premix. That is, since the motor frame can be easily configured with reference to the inner peripheral portion of the stator, a motor frame with high assembly accuracy can be configured during motor assembly.
[0023]
Moreover, although it demonstrated using 2 types of punching boards, the 1st punching board and the 2nd punching board, you may use 3 or more types of punching boards, and 1 type of punching board (The cut portion is not provided at the center between the teeth), and the front and back of the punched plate are reversed, and the cut portions may be arranged in different places and stacked.
[0024]
Furthermore, since the outer peripheral shape of both the first core plate and the second core plate is formed in a polygonal shape as in the embodiment, the outer periphery of the stator becomes uneven. Therefore, the first punching plate and the second punching plate are formed into a ring shape by making the shape of the long side portion, which is the outer peripheral portion of the stator of the first punching plate and the second punching plate, into a fan shape with an arbitrary width. When formed, the outer periphery becomes circular. Therefore, the outer periphery of the stator can be formed in a unified circular shape.
[0025]
【The invention's effect】
According to the present invention, even if a gap occurs in the cut portion, it is possible to form a new magnetic path that bypasses the gap and does not increase the magnetic resistance.
[0026]
[Brief description of the drawings]
FIG. 1 is a plan view of a first punched plate according to the present invention.
FIG. 2 is a plan view of a second punched plate according to the present invention,
FIG. 3 is a plan view of a first punched plate after being formed into a ring shape.
FIG. 4 is a plan view of a second punched plate after being formed into a ring shape.
FIG. 5 is a front view of a stator according to the present invention.
FIG. 6 is a partially enlarged view of the back yoke viewed from the axial center of the stator.
FIG. 7 is a plan view of a conventional punched plate.
FIG. 8 is a diagram for explaining a method of bending the punched plate in FIG.
FIG. 9 is a front view of a conventional stator.
FIG. 10 is a partially enlarged view of a back yoke viewed from the axial center of a conventional stator core.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... First punch plate 2, 6, 17 ... Back yoke 3, 7, 18 ... Teeth 4, 8, 19 ... Cut part 5 ... Second punch plate 9 ... First core plate 10 ... Second core Plate 11, 23 ... Stator 12, 21 ... Stator core 13, 22 ... Winding 14 ... Gap 15 ... Blanking plate 16 ... Hoop material 20 ... Slot portion 24 ... Insulating material

Claims (2)

The back yoke formed in a strip shape, a plurality of teeth extending vertically from one long side of the back yoke , and the teeth and the teeth on the long side of the back yoke from which the teeth extend A first punching plate having a V-shaped notch formed at an arbitrary position between adjacent teeth;
A back yoke formed in a band shape, a plurality of teeth extending vertically from one long side of the back yoke, and a long side of the back yoke from which the teeth extend A second punching plate having a V-shaped cut portion provided at an arbitrary position between the teeth adjacent to the teeth and different from the first punching plate;
And the fulcrum part of the V-shaped cut portion of the first punching plate and the second punching plate is not at the midpoint between the teeth on both sides,
Using the first punch plate and the second punch plate as a fulcrum of a V-shaped cut portion provided in each back yoke, each back yoke is placed in a direction in which the teeth face the axial center. Fold it into a ring to form the first core plate and the second core plate,
The first core plate and the second core plate are alternately laminated every one or every arbitrary number of sheets to form a stator core,
A stator for a motor, wherein a magnetic resistance is reduced by winding a winding around the teeth of the stator core. A motor frame, wherein the stator of the motor according to claim 1 is molded by resin or premix to cover the outer periphery of the stator .

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