JPH10178750A - Stator and motor frame of motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a stator wherein magnetic resistance is not increased, even if a gap is produced in a notched portion. SOLUTION: A stator 11 contains a first punched plate comprising a back yoke formed into a band shape, a plurality of teeth perpendicularly extending from one longer side of the back yoke, and V-notched portions positioned at an arbitrary place between teeth and the teeth adjacent to the teeth on the side of the longer side of the back yoke from which the teeth extend, and a second notched portion having V-notched portions at places different from the V-notched portions in the first punched plate. The second punched plate and the first punched plate are formed into an annular shape, by bending their respective back yokes in the direction in which the teeth face toward the axial center, on the V-notched portions formed in their respective back yokes, and first core plates 9 and second core plates 10 are thereby formed. The first core plates 9 and the second core plates 10 are alternately laminated one by one or on an arbitrary number for forming a stator core 12. Then a wire 13 is wound around the teeth on the stator core 12. The frame is constituted by molding the stator 11 using resin or premix.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor stator comprising a stator core having a plurality of teeth and windings wound around each tooth of the stator core.

[0002]

2. Description of the Related Art A conventional example of a conventional stator and motor frame will be described with reference to FIGS. FIG.
It is a top view of the conventional blank board. FIG. 8 is a view for explaining a method of folding the blank of FIG. FIG. 9 is a front view of a conventional stator. FIG. 10 is a partially enlarged view of a back yoke viewed from a shaft center of a conventional stator core.

In FIG. 7, a punched plate 15 is formed by punching a hoop material 16 made of a steel plate. The punching plate 15 is composed of a band-shaped back yoke 17 and a plurality of teeth 18 vertically extending from the long side 17a of the back yoke 17. Also, on the long side 17a side of the back yoke 17, between a tooth and a tooth adjacent to the tooth, an arbitrary place is provided.
A notch 19 is provided.

[0004] By forming the punching plate 15 into the shape as described above, the hoop material 16 after the punching plate 15 is punched out.
Waste material can be reduced. In other words, the punching plate 15 is fitted and punched out so that the tooth 18 of another punching plate 15 is disposed in the slot portion 20 which is a space between the teeth, so that it is unnecessary until now. The hoop material 16 of the slot 20 can be effectively used.

In FIG. 8, a stator core 21 is formed by stacking punched plates 15. The windings 22 are wound around the respective teeth 18 of the stator core 21, and the back yoke 1 is oriented in a direction in which the teeth 18 face the axial center direction with the notch 19 provided in the back yoke 17 as a fulcrum.
7 is bent. Then, the back yoke 17 is formed in a ring shape, and both ends of the back yoke 17 are fixed with an adhesive or welding. Alternatively, the stator core 21
Is fixed when molded with a premix or a resin. The cut angle of the V-shaped cut portion 19 is set so that the opposed slopes 19a and 19b of the cut portion 19 can contact each other when the back yoke 17 is formed in a ring shape.

In FIG. 9, the back yoke 17 is bent as described above to fix both ends of the back yoke.
Thus, an inner rotor type stator 23 is formed. Then, if there is a possibility that the windings 22 wound around the respective teeth 18 come into contact with each other, an insulating material 24 is inserted between the windings 22.

[0007]

When one type of punched plate 15 is stacked as in the above-mentioned conventional example, as shown in FIG. 10, the contact portions of the cut portions 19 are arranged in the same straight line.

Further, for example, if a gap is generated in the cut portion after the punched plate 15 is bent, a space is formed in the magnetic path in the back yoke, and in the conventional structure, it is necessary to pass through this space. The magnetic resistance in this space increases.

[0009]

According to the present invention, there is provided a back yoke formed in a belt shape, and a plurality of teeth vertically extending from one long side of the back yoke. A first punched plate having a V-shaped cut portion provided at an arbitrary position between the teeth and the teeth adjacent to the teeth on the long side of the back yoke from which the teeth extend; A back yoke formed in a band shape, a plurality of teeth vertically extending from one long side of the back yoke, and a long side of the back yoke from which these teeth extend, A second punched plate having a V-shaped cut portion provided at a different location from the first punched plate at an arbitrary position between the tooth and the tooth adjacent to the tooth; The second blanking plate and the second The first core plate is formed by bending each back yoke into a ring shape in a direction in which the teeth face the axial center direction, with the V-shaped cut portion provided in each back yoke as a fulcrum. To form a second core plate, the first core plate and the second core plate for each one,
Alternatively, there is provided a motor stator characterized in that a stator core is formed by alternately laminating an arbitrary number of sheets to form a stator core, and windings are wound around teeth of the stator core.

Further, there is provided a motor frame characterized in that the stator of the motor is formed by molding with resin or premix.

[0011]

A first punched plate and a second punched 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 laminated one by one or an arbitrary number to form a stator core, and a stator is formed by winding windings on teeth. I do.

In forming the first core plate or the second core plate, a gap may be formed when the opposing slopes of the cutouts do not come into contact with each other, or a gap may be formed by design. In this case, the magnetism flowing in the core plate having the gap flows by forming a magnetic path in the core plates stacked above and below the core plate.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment 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.
It is a top view of the 2nd blank board after shape | molding in a ring shape. FIG.
1 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 shaft center of the stator.

In FIG. 1, a first punched plate 1 is formed in a strip-shaped back yoke 2 like the punched plate in the conventional example, and extends vertically from the long side 2a side of the back yoke 2. It is composed of a plurality of teeth 3. In addition, a cut portion 4 is provided at an arbitrary position between an arbitrary tooth and a tooth adjacent to this tooth on one long side 2a side of the back yoke 2.

In FIG. 2, the second punched plate 5 is composed of a back yoke 6 and teeth 7, similarly to the first punched plate 1. Further, similarly to the first punched plate 1, a cut portion 8 is provided at an arbitrary place between an arbitrary tooth and a tooth adjacent to this tooth on one long side 6a side of the back yoke 6. ing. The location where the notch 8 is provided is provided at a location different from the location of the notch 4 provided on the first punched plate 1.

In FIG. 3 and FIG.
The teeth are bent in the direction toward the axial center with the notches 4, 8 provided in the back yokes 2, 6 provided in each of the second punched plates 5 as fulcrums. To form a ring. 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.

In FIG. 5, a stator 11 is formed by alternately stacking a first core plate 9 and a second core plate 10 one by one or an arbitrary number. When,
The winding 1 wound around the teeth of the stator core 12
3.

FIG. 6 shows a stator core in which two first core plates 9 and second core plates 10 are alternately laminated. The contact portions 4a and 8a of the cut portions 4 and 8 of the first core plate 9 and the second core plate 10 are arranged in a staggered manner.

When the first core plate 9 or the second core plate 10 is formed, if the gaps 14 are formed without the opposed slopes of the cuts 4 and 8 coming into contact with each other, or due to the design. If a certain gap 14 is formed, the magnetism flowing in the core plate in which the gap 14 is formed can flow by forming a magnetic path bypassing the core plates stacked above and below the core plate. .

If a certain gap 14 is formed in the design, the angle of the gap can be added to the cut angle of the V-shaped cut portion, and the cut angle of the cut portion can be set with a margin. Dimensional tolerances can be determined.

In this embodiment, when the first punched plate 1 and the second punched plate 5 are formed in a ring shape with reference to the inner peripheral portion of the stator, that is, with reference to the tip portion of the teeth, the outer peripheral portion is formed. The dimensional accuracy of the device becomes poor.

That is, even if an attempt is made to assemble the motor by inserting the stator into a motor frame made of a conventional steel plate, the dimensional accuracy of the outer periphery of the stator according to the present invention is poor. It becomes difficult to assemble the motor on the basis of the standard. That is, the mounting accuracy of a bearing or the like mounted on the motor frame deteriorates. Therefore, the stator is molded with resin or premix to form a motor frame. In other words, the motor frame can be easily configured with reference to the inner peripheral portion of the stator.
A motor frame with high assembling accuracy can be configured.

Although the description has been made using two types of punched plates, a first punched plate and a second punched plate, three or more types of punched plates may be used. By using a punched plate (a cut portion is not provided at the center between the teeth) and turning the cut plate upside down, the cut portions may be arranged at different locations and stacked.

Furthermore, as in the embodiment, the outer periphery of both the first core plate and the second core plate is formed in a polygonal shape, so that the outer periphery of the stator becomes irregular. Therefore, the first punched plate and the second punched 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 punched plate and the second punched 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 uniform circle.

[0025]

According to the present invention, even if a gap is formed in the cut portion, a new magnetic path without increasing the magnetic resistance can be formed by bypassing the gap.

[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 shaft center of the stator.

FIG. 7 is a plan view of a conventional punched plate.

FIG. 8 is a view for explaining a method of folding the blank of FIG. 7;

FIG. 9 is a front view of a conventional stator.

FIG. 10 is a partially enlarged view of a conventional stator core in which a back yoke is viewed from a shaft center.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... First punched plate 2, 6, 17 ... Back yoke 3, 7, 18 ... Teeth 4, 8, 19 ... Cut portion 5 ... Second punched plate 9 ... First core plate 10 ... Second core Plates 11, 23 ... Stator 12, 21 ... Stator core 13, 22 ... Winding 14 ... Gap 15 ... Die plate 16 ... Hoop material 20 ... Slot part 24 ... Insulation material

Claims (2)

[Claims] 1. A back yoke formed in a belt shape, a plurality of teeth vertically extending from one long side of the back yoke, and a long side of the back yoke from which these teeth extend. A first punched plate having a V-shaped cut portion provided at an arbitrary position between a tooth and a tooth adjacent to the tooth; a band-shaped back yoke; A plurality of teeth vertically extending from one of the long sides of the yoke, and any teeth between the teeth and the teeth adjacent to the teeth on the long sides of the back yoke where the teeth extend. And a second punched plate having a V-shaped cut portion provided at a location different from the first punched plate. The second punched plate and the first punched plate On each back yoke V-shaped cut portion that is in the fulcrum,
Each back yoke is bent into a ring shape in the direction in which the teeth are oriented toward the axis center to form a first core plate and a second core plate. A stator for a motor, wherein a stator core is formed by alternately laminating the stator cores for each sheet or for an arbitrary number of sheets, and windings are wound around teeth of the stator core. 2. A motor frame, wherein the motor stator according to claim 1 is formed by molding with a resin or a premix.