JPH0568352A - Iron core for electrical equipment - Google Patents

Abstract

PURPOSE:To reduce vibration and noise due to vibration between plates by applying an adhesive agent between tip iron plates on a tooth part of the stator core of a motor to fix the iron plates on the tooth part. CONSTITUTION:An adhesive agent 5 is applied between iron plates of tip parts 4 on a tooth part 3 in a stator side to fix the iron plates to one another. Consequently, the tooth part 3 is integrally formed as a motor total unit. Since the iron plates on the tooth part 3 are fixed, a clearance between the plates is prevented from spreading by repulsing the iron plates even when magnetic flux of the same polarity passes through the tooth part 3. The iron plate is prevented from also fluctuating due to a change of the clearance by changing the passing magnetic flux. Thus by generating no vibration between the iron plates of the tooth part 3, generation of vibration and noise of a motor is eliminated to decrease noise. Generation of looseness, or clatter due to vibration of the iron plate is eliminated to improve also durability of the motor itself.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electric equipment such as motors.

[0002]

2. Description of the Related Art A motor, which is a type of electric equipment, has a stator core 1 having windings. As shown in FIG. 7, in the stator core 1, the outer peripheral portion 2 is fixed to the thin iron plates in the axial direction by the caulking jig 3 or by welding. Also, in some cases, when punching a slot or the like, recesses and protrusions are formed by the iron plates themselves in the vicinity of the outer peripheral portion of the iron plates, so that when the iron plates are laminated, the iron plates are fixed to each other near the outer peripheral portion to form the iron core 1. Thus, the core was fixed to the outer peripheral portion or the vicinity thereof, but the inner peripheral portion, that is, the tooth portion 3 or the tip portion 4 thereof was not fixed.

For this reason, when electricity is applied to the stator windings, so-called plate-to-plate vibration occurs in which the iron plates vibrate with each other, resulting in large vibration and noise of the motor, which adversely affects the surroundings of the motor. It was As an example of such a case, there is an example of an iron core in the electrical machinery design overview (The Institute of Electrical Engineers of Japan S52).

[0004]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention In an electric device such as a motor, only a part of an iron core made of a thin plate made of iron or the like is fixed. did. Therefore, the vibration noise of the motor becomes large, which is a problem. Therefore, the present invention aims to reduce vibration and noise due to inter-plate vibration.

[0005]

Means for Solving the Problems An adhesive is applied between the tip iron plates of the teeth of the stator core of the motor to fix the iron plates of the teeth.

[0006]

By fixing the tooth portion 3, the tooth portion is integrated and has high rigidity. Further, as shown in FIG. 2, magnetic flux of the same pole passes through the teeth, so that the iron plates repel each other and try to separate from each other. This causes vibration between the plates, which causes vibration and noise. By sticking, the occurrence of inter-plate vibration is prevented.

[0007]

FIG. 1 shows an embodiment of the present invention. In the motor of the present invention, the tip of the tooth portion on the stator side is coated with the adhesive 15 between the iron plates as shown in FIG. 1, and the iron plates are fixed to each other. Therefore, the tooth portion 3 is integrated as a whole motor.

Since the iron plates of the tooth portions 3 are fixed to each other, as shown in FIG. 1, even if magnetic flux of the same polarity passes through the tooth portions 3, the iron plates do not repel each other and the gap between the plates does not expand. .. Further, the iron plate does not vibrate due to the change of the gap due to the change of the passing magnetic flux.

Since the inter-plate vibration of the iron plate does not occur in the tooth portion, the vibration noise of the motor is eliminated and the noise is reduced. In addition, looseness and rattling due to vibration of the iron plate are eliminated, and the durability of the motor itself is improved. (Other Embodiments) As shown in FIG. 3, the same effect as fixing with an adhesive can be obtained by welding 6 at a plurality of positions of the tooth portion 3 in the axial direction with a laser or a beam.

As shown in FIG. 4, a small hole 7 is formed in the tooth portion in the axial direction, and a thin rod is passed through the toothed portion. It can be reduced. As shown in FIG. 5, one or a plurality of notches 8 are provided in a part of the tooth portion, and a caulking jig can be attached thereto to fix the tooth portion.

Although the stator teeth of the motor have been described, by applying the method of the present invention even when the iron plate through which the magnetic flux passes is like a cantilever as shown in FIG. Vibration between boards and noise can be reduced.

[0012]

According to the iron plate structure of the present invention, since the iron plate is fixed or caulked and fixed, inter-plate vibration of the iron plate due to passage or fluctuation of magnetic flux does not occur, so that vibration and noise are lower than before. In addition, there is no occurrence of loosening or rattling of component equipment due to inter-plate vibration of the iron plate, and the accuracy of the equipment can be maintained for a longer period than before.

[Brief description of drawings]

FIG. 1 is a sectional view of a tooth portion of a motor of the present invention.

FIG. 2 is a state of repulsion between iron plates when magnetic flux of the same pole passes through the iron plates.

FIG. 3 is a fixing diagram in which the tips of the teeth are welded by a laser or a beam.

FIG. 4 is a diagram in which a hole for a fixing pin is opened at the tip of the tooth portion.

FIG. 5 is a view in which a notch for a fixing jig is provided at a tip portion of a tooth portion.

FIG. 6 is a view of a cantilevered iron core.

[Fig. 7] Fig. 7 is a diagram showing the fixing of only the outer peripheral portion of the conventional stator core.

[Explanation of symbols]

1 ... Iron core (laminated), 2 ... Outer peripheral portion, 3 ... Tooth portion,
4 ... Tooth tip, 5 ... Adhesive, 6 ... Welding,
7 ... Hole for caulking, 8 ... Notch, 9 ... Cantilever.

Claims (2)

[Claims] 1. An electric device having an iron core in which thin plates made of an iron plate, an amorphal material or an iron compound are laminated, and the teeth and the tip of the stator core are fixed to each other with an adhesive or a synthetic resin material. An iron core for electric equipment, which is characterized in that 2. The iron core for an electric device according to claim 1, wherein the tip of the tooth portion is fixed to one or more thin plates by laser or electric discharge machining.