JP2001231207A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor in which noise caused by vibrations of the winding of the motor is reduced. SOLUTION: In this motor, teeth 3 are arranged at equal intervals from a yoke part 2 of a stator core 1, slots are formed on both sides of the teeth 3, a pair of facing insulators 5 are installed from both end surfaces of the stator core 1 for insulation, on the end surface of the stator core 1 and on the outside of the teeth 3, except tip parts of the teeth 3 facing at least a rotor (which is not shown in figure), and winding 10 is wound around a part from the slot to the next slot. A slant part 5a is formed in an inside corner part of the insulator 5 corresponding to a corner part of the teeth part 3. A corner edge of the teeth 3 is made to abut against the slant part 5a. A gap 6 is formed between the insulator 5 and the facing surface of the teeth 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor, and more particularly to a structure for mounting an insulator to a stator core.

[0002]

2. Description of the Related Art FIG. 5 is a sectional view showing an example of a stator of a conventional electric motor, and FIG. 6 is a sectional view of a main part corresponding to BB in FIG.

Conventionally, an electric motor has teeth 3 provided at equal intervals from a yoke 2 of a stator core 1, slots 4 are formed on both sides of the teeth 3, and at least the teeth opposing a rotor (not shown). A pair of insulators 5 opposed to each other are mounted on the end face of the stator core 1 and the outside of the teeth 3 from both end faces of the stator core 1 except for the end of the stator core 3, and between the slot 4 and the next slot 4. The winding 10 was wound.

However, the insulator 5 is designed so as to be fitted into the outer surface of the teeth 3 in close contact. On the other hand, when an alternating current whose polarity is periodically switched flows through the winding, a magnetic force that periodically becomes zero is generated between the wires of the winding, and vibration occurs.

As a result, the vibrations are transmitted from the teeth 3 to the entire stator core 1 and further to the brackets to resonate, and there is a possibility that noise is generated from the entire electric motor, which is a problem.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned conventional problems, and has as its object to provide a motor in which noise caused by vibration of a winding is reduced.

[0007]

In order to achieve the above object, teeth are provided at equal intervals from the yoke portion of the stator core, slots are formed on both sides of the teeth, and at least the tips of the teeth facing the rotor. Except for the end face of the stator core and the outside of the teeth, a pair of insulators facing each other are mounted from both end faces of the stator core, and the electric motor is formed by winding a winding between the slot and the next slot. A slope is formed at an inner corner portion of the insulator corresponding to a corner of the tooth, and a corner edge of the tooth is brought into contact with the slope, while a gap is provided between the insulator and a facing surface of the tooth. To be.

A slope is formed at an inner corner of the insulator corresponding to a slot-side corner of the yoke of the stator core, and a slot-side edge of the yoke is brought into contact with the slope. On the other hand, a gap is provided between the slot side of the yoke portion of the stator core and the facing surface of the insulator, and the end face of the insulator and the end face of the yoke portion of the stator core are in contact with each other.
Also, the corners of the teeth are chamfered.

Further, the edge of the slot side of the yoke portion of the stator core is chamfered.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail based on embodiments with reference to the accompanying drawings. FIG. 1 is a sectional view showing one embodiment of a stator core of an electric motor according to the present invention,
FIG. 2A is a cross-sectional view of a main part corresponding to AA in FIG.
(B) is a mounting explanatory view of the insulator.

In the figure, 1 is a stator core, 2 is a yoke, 3 is a tooth, 4 is a slot, 5 is an insulator, 5a is a slope, 6 is a gap, and 10 is a winding. Here, the same reference numerals are used for the same parts as in the conventional example.

First, the stator of the electric motor will be described. Teeth 3 are provided at equal intervals from the yoke 2 of the stator core 1, and slots 4 are formed on both sides of the teeth 3. Then, a pair of opposed insulators 5 are attached from both end faces of the stator core 1 to the end face of the stator core 1 and the outside of the teeth 3 except for at least the tips of the teeth 3 opposed to the rotor (not shown). The winding 10 is wound between the slot 4 and the next slot 4.

Here, a slope portion 5a is formed at an inner corner portion of the insulator 5 corresponding to a corner portion of the tooth 3, and a corner edge of the tooth 3 is brought into contact with the slope portion 5a while the insulator 3 is in contact with the slope portion 5a. A gap 6 is provided between the opposing surfaces of the teeth 5 and the teeth 3.

Next, the operation and effect of the present invention will be described. A slope portion 5a is formed at an inner corner portion of the insulator 5 corresponding to a corner portion of the tooth 3, and the slope portion 5a is formed.
a, the gap 6 is provided between the insulator 5 and the opposing surface of the tooth 3, so that the gap 6 has a buffering effect on the transmission of vibration of the winding 10. And vibration is reduced. As a result,
The noise of the electric motor can be reduced.

FIG. 3 is a sectional view of a main part showing another embodiment of the stator core of the electric motor according to the present invention. FIG. 3 (a) is a cross sectional view of the main part corresponding to AA in FIG. 1, and FIG. 3 (b) is an insulator. FIG. In the case of this embodiment, a chamfered portion 3a is formed at the corner of the tooth 3 by chamfering. As a result, the slope 5a formed at the inner corner portion of the insulator 5 and the chamfered portion 3a formed at the corner of the tooth 3 come into contact with a small area. Can be fixed to 3.

FIG. 4 is a sectional view of a main part showing another embodiment of the stator core of the electric motor according to the present invention. In the case of this embodiment, a slope 5b is formed in an inner corner portion of the insulator 5 corresponding to a corner of the yoke 2 of the stator core 1 on the side of the slot 4, and a slot of the yoke 2 is formed in the slope 5b. The four side edges are brought into contact. On the other hand, a gap 7 is provided between the slot 4 side of the yoke 2 of the stator core 1 and the facing surface of the insulator 5. Further, a chamfered portion 2a is formed by chamfering a corner edge of the yoke portion 2 of the stator core 1 on the slot 4 side. The end face of the insulator 5 is in contact with the end face of the yoke 2 of the stator core 1.

As a result, the chamfered portion 2a formed at the edge of the slot 4 side of the yoke 2 and the slope 5b formed at the inner corner of the insulator 5 are brought into contact with a small area. The insulator 5 can be firmly fixed to the yoke 2. On the other hand, since the gap 7 is provided between the insulator 5 and the facing surface of the yoke 2, the gap 7 has a buffering effect on the transmission of the vibration of the winding 10, and the vibration is reduced.

[0018]

As described above, in the present invention, teeth are provided at equal intervals from the yoke portion of the stator core, slots are formed on both sides of the teeth, and at least the tips of the teeth facing the rotor are removed. A pair of insulators facing each other are mounted on the end face of the stator core and the outside of the teeth from both end faces of the stator core, and a winding is wound between the slot and the next slot. A slope portion is formed at an inner corner portion of the insulator corresponding to the portion, and a corner edge of the tooth is brought into contact with the slope portion, so that a gap is provided between the insulator and the opposing surface of the tooth. did. As a result, it is possible to provide a motor in which noise caused by vibration of the windings of the electric motor is reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing one embodiment of a stator core of an electric motor according to the present invention.

FIG. 2A is a sectional view of a main part corresponding to AA in FIG. 1,
(B) is a mounting explanatory view of the insulator.

3A and 3B are cross-sectional views of main parts showing another embodiment of the stator core of the electric motor according to the present invention, in which FIG. 3A is a cross-sectional view of main parts corresponding to AA in FIG. 1, and FIG. FIG.

4A and 4B are cross-sectional views of main parts showing another embodiment of a stator core of a motor according to the present invention, in which FIG. 4A is a cross-sectional view of main parts corresponding to CC in FIG. 1, and FIG. FIG.

FIG. 5 is a cross-sectional view illustrating an example of a conventional motor stator.

6 is a cross-sectional view of a main part corresponding to BB in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator core 2 Yoke part 2a Chamfer part 3 Teeth 3a Chamfer part 4 Slot 5 Insulator 5a Slope part 5b Slope part 6 Gap 7 Gap 10 Winding

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yoichi Tanabe 1116 Suenaga, Takatsu-ku, Kawasaki F-term in Fujitsu General Limited (Reference) 5H002 AA04 AB06 AE07 AE08 5H604 AA06 BB01 BB14 CC01 CC04 PB03

Claims (4)

[Claims] 1. Teeth are provided at equal intervals from a yoke portion of a stator core, slots are formed on both sides of the teeth, and at least the end faces of the stator core and the outside of the teeth are removed except at least the tips of the teeth facing the rotor. A pair of opposed insulators are mounted from both end faces of the stator core, and windings are wound between the slot and the next slot. An inner corner of the insulator corresponding to a corner of the teeth. An electric motor characterized in that a slope portion is formed in the portion and a corner edge of the tooth is brought into contact with the slope portion, while a gap is provided between the insulator and the opposing surface of the tooth. 2. A slope portion is formed at an inner corner portion of the insulator corresponding to a slot side corner portion of the yoke portion of the stator core, and a slot side edge of the yoke portion is brought into contact with the slope portion. On the other hand, a gap is provided between the slot side of the yoke portion of the stator core and the opposing surface of the insulator, and the end face of the insulator is in contact with the end face of the yoke portion of the stator core. 1. The electric motor according to 1. 3. The electric motor according to claim 1, wherein corners of the teeth are chamfered. 4. The electric motor according to claim 2, wherein the edge of the yoke portion of the stator core at the slot side is chamfered.