JP2002101606A - Electric motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce vibration or noise transmitted to the bracket and simplify the assembly. SOLUTION: The motor has a stator, a bracket, and a cover bracket 4. A stator is provided with a plurality of teeth formed on the inner periphery of the yoke portion of the stator iron-core 1, a slot formed on both sides of each tooth, an insulator 10 formed integrally with an end surface at least of the stator iron-core 1 and the slot, and a winding 2 wound in the slot. The stator is pressed into a cylindrical portion 3b of the supporting bracket 3. A cylindrical portion 4b of the cover bracket 4 is engaged in the spigot of the supporting bracket 3. A pawl 3e is folded and fixed along an end surface 4c of the cylindrical portion of the cover bracket 4. In the motor provided by the above components, the end surface of the insulator 10 is provided with a buffer portion 10a of an annular cross-section extended from the end surface of the insulator 10 and covering the outer peripheral portion of the stator iron- core 1.

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 vibration damping structure for a bracket.

[0002]

2. Description of the Related Art FIG. 3 is an enlarged sectional view of an essential part showing an example of a conventional motor rotor. In the conventional motor, a plurality of teeth (not shown) are provided on an inner periphery of a yoke (not shown) of the stator core 1, and slots (not shown) are formed on both sides of each tooth. At least an insulator 10 is integrally formed on the end face of the stator core 1 and the slot, and a stator is formed by winding the winding 2 in the slot, and a rotor 8 having a rotating shaft 9 fitted at the center thereof. A holding portion 3a of a bearing 7 that supports one of the rotating shafts 9 of the rotor 8; a cylindrical portion 3b connected to the holding portion 3a; a spigot portion 3d formed on an inner edge of an opening of the cylindrical portion 3b; A support bracket 3 having a plurality of claw portions 3e projecting outward from an open end of the portion 3b;
And a lid bracket 4 connected to the holding portion 4a and having a tube portion 4b corresponding to the spigot portion 3d. 3b, the stator is press-fitted, and the cylindrical portion 4b of the lid bracket 4 is fitted to the spigot portion 3d of the support bracket 3, and the claw portion 3e is fitted along the cylindrical portion end surface 4c of the lid bracket 4. It is bent and fixed.

[0003] However, the support bracket 3 and the stator core 1 are in direct contact with each other, so that vibration and noise inside the motor are transmitted to the support bracket 3 and the vibration and noise are reduced.
There is a possibility that noise may occur, which is a problem.
On the other hand, in the vibration-proof structure technology disclosed in Japanese Patent Application Laid-Open No. H10-304640, a cushioning member such as an O-ring is provided at the butted portion of the bracket, which also serves as a waterproof and prevents vibration, but the number of parts increases. However, there remains a problem that the manufacturing process becomes complicated.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to provide an electric motor in which vibration and noise transmitted to a bracket are reduced and assembly is simplified. And

[0005]

In order to achieve the above object, a plurality of teeth are provided on an inner periphery of a yoke portion of a stator core, and slots are formed on both sides of each tooth portion. A stator formed by integrally molding an insulator on the end face of the iron core and the slot, and winding a winding around the slot,
A rotor having a rotating shaft fitted at the center, a holding portion of a bearing that supports one of the rotating shafts of the rotor, a cylindrical portion connected to the holding portion, and a spigot portion formed at an inner edge of an opening of the cylindrical portion. A support bracket having a plurality of claws protruding outward from an opening end of the cylindrical portion; a holding portion of a bearing for supporting the other one of the rotating shafts of the rotor; and the spigot portion connected to the holding portion. A lid bracket having a tubular portion corresponding to the support bracket, wherein the stator is press-fitted into the tubular portion of the support bracket, and the tubular portion of the lid bracket is fitted into a spigot portion of the support bracket; In the electric motor, a portion is bent along the end surface of the cylindrical portion of the lid bracket, and the end surface of the insulator is provided with an annular buffer section that bulges from the end surface of the insulator and covers the outer peripheral portion of the stator core. To be formed

Alternatively, a plurality of teeth are provided on the inner periphery of the yoke portion of the stator core, slots are formed on both sides of each tooth, and at least an end face of the stator core and the slot are opposed to each other. The insulator is mounted from both end faces of the stator core, and a stator having a winding wound around the slot, a rotor having a rotating shaft fitted at the center, and one of the rotating shafts of the rotor A support having a holding portion of a bearing to be supported, a tubular portion connected to the holding portion, a spigot portion formed at an inner edge of an opening of the tubular portion, and a plurality of claws projecting outward from an opening end of the tubular portion. A bracket, a holding portion of a bearing that supports the other of the rotating shafts of the rotor, and a lid bracket that is connected to the holding portion and has a cylindrical portion corresponding to the spigot portion, wherein the cylindrical portion of the support bracket includes: Press-fit the stator and insert the support bracket In the electric motor, the tubular portion of the lid bracket is fitted into the portion, and the claw portion is bent and fixed along the tubular portion end surface of the lid bracket, and the end face of the insulator is expanded from the end face of the insulator. And a buffer portion having an annular cross section that covers the outer peripheral portion of the stator core is formed.

A void is formed at the axial center of the buffer of the insulator.

Further, the material of the insulator is an elastomer.

[0009]

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 an enlarged sectional view of a main part showing an embodiment of a motor according to the present invention.
Here, the same reference numerals are used for the same parts as in the conventional example. In the figure, 1 is a stator core, 2 is a winding, 3 is a support bracket, 3a is a holding portion, 3b is a cylindrical portion, 3d is a spigot portion, 3
e is a claw portion, 4 is a lid bracket, 4a is a holding portion, 4b is a cylinder portion, 4c is a cylinder end surface, 7 is a bearing, 8 is a rotor, 9 is a rotating shaft, 10 is an insulator, and 10a is a buffer portion. .

First, the stator will be described. A plurality of teeth (not shown) are provided on the inner periphery of a yoke (not shown) of the stator core 1 and slots (not shown) are provided on both sides of each tooth. The insulator 10 is integrally formed at least on the end face of the stator core 1 and the slot, and the winding 2 is wound around the slot. Then, the center of rotation 9
Is provided.

A holding portion 3a of a bearing 7 for supporting one of the rotating shafts 9 of the rotor 8, a cylindrical portion 3b connected to the holding portion 3a, and a spigot portion formed at an inner edge of an opening of the cylindrical portion 3b. 3
d, a support bracket 3 having a plurality of claw portions 3e protruding outward from an open end of the cylindrical portion 3b, and a holding portion 4a of a bearing 7 for supporting the other one of the rotating shafts 9 of the rotor 8; A cylindrical portion 4 connected to the holding portion 4a and corresponding to the spigot portion 3d;
b.

The cylindrical portion 3b of the support bracket 3
And the cylindrical portion 4b of the lid bracket 4 is fitted into the spigot portion 3d of the support bracket 3, and the claw portion 3e is moved along the cylindrical end surface 4c of the lid bracket 4. It is bent and fixed. Here, on the end face of the insulator 10, there is formed a buffer section 10 a having an annular cross section which bulges from the end face of the insulator 10 and covers the outer peripheral portion of the stator core 1. Further, an elastomer is used as a material of the insulator 10.

Next, the operation and effect of the present invention according to the above embodiment will be described. The insulator 10
In addition, a buffer section 10a having an annular cross section that covers the outer peripheral portion of the stator core 1 is formed so as not to directly contact the support bracket 3 and the stator core 1, so that the support bracket 3 and the lid bracket 4 can reduce transmission of vibration and noise.

Further, since the insulator 10 is made of an elastomer which is a polymer rubber,
Vibration and noise transmission can be further reduced.

FIG. 2 is an enlarged sectional view of a main part showing another embodiment of the electric motor according to the present invention. In the case of this embodiment, first, the stator will be described. A plurality of teeth (not shown) are provided on the inner periphery of a yoke (not shown) of the stator core 1.
Slots (not shown) are formed on both sides of each tooth portion, and a pair of insulators 10 facing each other are mounted on at least the end face of the stator core 1 and the slots from both end faces of the stator core 1. The winding 2 is wound around the slot. Next, the rotor 8 fitted with the rotating shaft 9 at the center is provided.

A holding portion 3a of a bearing 7 for supporting one of the rotating shafts 9 of the rotor 8, a cylindrical portion 3b connected to the holding portion 3a, and a spigot portion formed on the inner edge of the opening of the cylindrical portion 3b. 3
d, a support bracket 3 having a plurality of claw portions 3e protruding outward from an open end of the cylindrical portion 3b, and a holding portion 4a of a bearing 7 for supporting the other one of the rotating shafts 9 of the rotor 8; A cylindrical portion 4 connected to the holding portion 4a and corresponding to the spigot portion 3d;
b.

The cylindrical portion 3b of the support bracket 3
And the cylindrical portion 4b of the lid bracket 4 is fitted into the spigot portion 3d of the support bracket 3, and the claw portion 3e is moved along the cylindrical end surface 4c of the lid bracket 4. It is bent and fixed. Here, on the end face of the insulator 10, there is formed a buffer section 10 a having an annular cross section which bulges from the end face of the insulator 10 and covers the outer peripheral portion of the stator core 1. Further, an elastomer is used as a material of the insulator 10.

A gap 10b is formed at the axial center of the buffer 10a of the pair of insulators 10 facing each other.
Is formed. In this embodiment, the gap 10b is formed by making the sum of the lengths of the buffer portions 10a of the pair of insulators 10 shorter than the thickness of the stator core 1.

Next, the operation of the present invention according to this embodiment,
The effect will be described. The operation and effect of the present invention according to this embodiment are substantially the same as those of the above-described embodiment, but the transmission of vibration and noise to the support bracket 3 and the lid bracket 4 is reduced, and the gap 10b is formed. As a result, the support bracket 3 is
Does not directly contact the stator core 1 due to the thickness of the buffer portion 10a, and the winding 2 and the stator core 1
Can improve heat radiation.

[0020]

As described above, in the present invention, a plurality of teeth are provided on the inner periphery of the yoke of the stator core, and slots are formed on both sides of each tooth, and at least the end face of the stator core is provided. A stator in which an insulator is integrally formed in the slot, and a winding is wound around the slot, a rotor having a rotating shaft fitted at the center, and one of the rotating shafts of the rotor is supported. A holding portion of the bearing, a cylindrical portion connected to the holding portion, a spigot portion formed at an inner edge of an opening of the cylindrical portion, and a support bracket having a plurality of claws projecting outward from an opening end of the cylindrical portion, A holding portion of a bearing that supports the other of the rotating shafts of the rotor; and a lid bracket that is connected to the holding portion and has a cylindrical portion corresponding to the spigot portion. Into the spigot part of the support bracket, An electric motor in which a cylindrical portion of a racket is fitted and the claw portion is bent and fixed along the cylindrical portion end surface of the lid bracket, wherein the stator core bulges from the insulator end surface to the end surface of the insulator. Is formed to form a buffer portion having an annular cross section which covers the outer peripheral portion of the. As a result, it is possible to provide a motor in which the transmission of vibration and noise to the bracket of the motor is reduced, the assembly is simplified, and the manufacturing cost is reduced.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a main part showing an embodiment of an electric motor according to the present invention.

FIG. 2 is an enlarged sectional view of a main part showing another embodiment of the electric motor according to the present invention.

FIG. 3 is an enlarged sectional view of a main part showing an example of a conventional electric motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator iron core 2 Winding 3 Support bracket 3a Holding part 3b Tube part 3d Inlay part 3e Claw part 4 Lid bracket 4a Holding part 4b Tube part 4c Tube end face 7 Bearing 8 Rotor 9 Rotary shaft 10 Insulator 10a Buffer part 10b Air gap Department

Continued on the front page F term (reference) 5H604 BB01 BB14 CC01 DB16 PB03 5H605 AA04 BB05 CC01 CC02 CC03 CC10 EA06 EA09 EA14 FF08 GG18

Claims (4)

[Claims] 1. A plurality of teeth are provided on an inner periphery of a yoke portion of a stator core, slots are formed on both sides of each tooth, and an insulator is integrally formed at least on an end face of the stator core and the slots. A stator having a winding wound around the slot, a rotor having a rotating shaft fitted at the center thereof, a holding portion for a bearing that supports one of the rotating shafts of the rotor, and a holding portion for the bearing. And a support bracket having a plurality of claws protruding outward from an opening end of the cylindrical portion, and the other of the rotating shafts of the rotor. A holder for supporting the bearing, and a lid bracket connected to the holder and having a tubular portion corresponding to the spigot portion, wherein the stator is press-fitted into the tubular portion of the support bracket; When fitting the cylindrical part of the lid bracket to the part In the electric motor, the claw portion is bent and fixed along the end surface of the lid bracket, wherein the end surface of the insulator bulges from the end surface of the insulator and covers the outer peripheral portion of the stator core. An electric motor characterized by forming a buffer portion of (1). 2. A plurality of teeth are provided on an inner periphery of a yoke portion of a stator core, slots are formed on both sides of each tooth, and at least an end face of the stator core and the slot are opposed to each other. The insulator is mounted from both end faces of the stator core, and a stator is formed by winding a winding around the slot, a rotor having a rotating shaft fitted at the center, and one of the rotating shafts of the rotor is A support having a holding portion of a bearing to be supported, a tubular portion connected to the holding portion, a spigot portion formed at an inner edge of an opening of the tubular portion, and a plurality of claws projecting outward from an opening end of the tubular portion. A bracket, a holding portion of a bearing that supports the other of the rotating shafts of the rotor, and a lid bracket that is connected to the holding portion and has a cylindrical portion corresponding to the spigot portion, wherein the cylindrical portion of the support bracket includes: Press-fit the stator and insert it into the spigot of the support bracket. An electric motor in which the tubular portion of the lid bracket is fitted and the claw portion is bent and fixed along the tubular portion end surface of the lid bracket, wherein the insulator bulges from the insulator end surface to the end surface thereof. An electric motor characterized by forming a buffer section having an annular cross section that covers an outer peripheral portion of a stator core. 3. The insulator according to claim 1, wherein a gap is formed at the axial center of the buffer of the insulator.
Or the electric motor according to claim 2. 4. The electric motor according to claim 1, wherein a material of the insulator is an elastomer.