JP2002084696A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor which reduce the vibration and noise of the stator. SOLUTION: In a motor which is provided with a plurality of teeth 3 on the inside periphery of the yoke 2 of a stator core 1, and in which slots 4 are made on both sides of each tooth 3, and a pair of insulators 5 which mutually counterpose are mounted, from both end faces of the stator core to at least the end faces of the above stator core 1 and slots 4, and winding are made in each of the slots 4, a plate-shaped shock-absorbing member 6 corresponding to the end face of that tooth 3 is put between the several end faces of the insulator 5 and the tooth 3 of the stator 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 stator.

[0002]

2. Description of the Related Art FIG. 1A is a front view showing an example of a stator before winding a winding of a conventional electric motor, FIG. 1B is a side view, FIG. 1C is a rear view, and FIG. FIG. 5 is a cross-sectional view corresponding to AA in FIG.
FIG. 5 is an enlarged sectional view of a main part corresponding to CC in FIG. 4 showing an example of a stator of a conventional electric motor.

Conventionally, an electric motor has a plurality of teeth 3 provided on an inner periphery of a yoke 2 of a stator core 1, and slots 4 are formed on both sides of each tooth 3, and at least an end face of the stator core 1 and the slots 4 are formed. In addition, a pair of insulators 5 facing each other are mounted from both end surfaces of the stator core 1, and a winding 10 is wound around the slot 4.

However, the material of the insulator 5 includes a thermoplastic resin such as PBT and PET, a material in which an epoxy powder is welded, a film, and the like. In order to improve the coupling strength with the stator core 1, one having high mechanical strength and relatively high hardness has been used.

Therefore, the vibration between the stator core 1 and the insulator 5 is hardly attenuated.
There is a problem that vibration and noise may occur. On the other hand, in order to suppress the electromagnetic vibration, there are a method of integrally molding the stator core 1 and the winding 10, a method of adding a damper function to the rotor, and a driving method using a sine wave current. However, there was a problem that the cost was greatly increased.

[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 an electric motor in which vibration and noise of a stator are reduced.

[0007]

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.
Slots are formed on both sides of each tooth portion, and a pair of insulators facing each other are mounted on at least the end face and the slot of the stator core from both end faces of the stator core, and a winding is wound around the slot. A plate-like cushioning member corresponding to the end surface of the tooth portion is sandwiched between the end surface of each tooth portion of the insulator and the stator core.

[0008] The width of the cushioning member is set to be wider than the width of the tooth portion around which the winding is wound.

Further, the material of the cushioning member is a rubber having a low elastic modulus.

Further, the buffer member is provided integrally with an annular portion corresponding to both end surfaces of the yoke portion of the stator core.

[0011]

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 (a)
FIG. 2 is a front view showing an example of a stator before winding the windings of the electric motor according to the present invention, FIG. 2B is a side view, FIG.
FIG. 1 shows an embodiment of a motor stator according to the present invention.
FIG. 3B is a cross-sectional view corresponding to AA, and FIG. 3 is an enlarged cross-sectional view of a main part corresponding to BB in FIG. 2 showing an embodiment of the stator of the electric motor according to the present invention. In the figure, 1 is a stator core, 2 is a yoke, 3 is a tooth, 4 is a slot, 5 is an insulator, 6 is a buffer member, 7 is an annular portion, and 10 is a winding. The same reference numerals are used for the same parts as in the conventional example.

In the electric motor according to the present invention, a plurality of teeth 3 are provided on the inner periphery of the yoke 2 of the stator core 1, and slots 4 are formed on both sides of each tooth 3. An insulator 5 using a pair of opposing thermoplastic resins or the like is attached to the end face of the stator core 1 and the slot 4 from both end faces of the stator core 1. A winding 10 is wound around the slot 4. An insulator 5 corresponding to the tooth portion 3 is provided between the tooth portion 3 and the winding 10.
The ends of the U-shaped portions are fitted to each other to cover the wound portion of the winding 10 of the tooth portion 3 to perform winding insulation.

Here, a plate-like buffer member 6 corresponding to the end surface of the tooth portion 3 is sandwiched between the insulator 5 and each end surface of the tooth portion 3 of the stator core 1, and the tooth portion 3 or The transmission of electromagnetic vibration from the winding 10 is attenuated.
Further, the cushioning member 6 is provided with the tooth portion 3 around which the winding 10 is wound.
To attenuate the direct transmission of the electromagnetic vibration. Further, the material of the cushioning member 6 further attenuates the transmission of the electromagnetic vibration by using rubber having a low elastic modulus.

On the other hand, the cushioning member 6 is provided integrally with the annular portions 7 corresponding to both end surfaces of the yoke portion 2 of the stator core 1, and the cushioning member 6 is provided with the insulator 5 and the tooth portion of the stator core 1. 3 between both end faces. In addition, without integrating the buffer member 6, the tooth portion 3
Of the insulator 5 in advance.
May be attached to the inner surface of the. (Not shown)

Next, the operation and effect of this embodiment will be described. Since the buffer member 6 is sandwiched, the transmission of electromagnetic vibration between the stator core 1 and the insulator 5 can be reduced without directly transmitting the vibration, and vibration and noise of the electric motor can be reduced.

Further, since the width of the cushioning member is made wider than the width of the teeth 3, direct transmission of the electromagnetic vibration between the portion of the teeth 3 facing the slot 4 and the insulator 5 is achieved. Thus, vibration and noise of the motor can be further reduced.

Further, since the cushioning member 6 is made of rubber having a low elastic modulus, the transmission rate of electromagnetic vibration between the stator core 1 as the vibration source and the insulator 5 can be reduced, and the vibration and vibration of the motor can be further reduced. Noise can be reduced.

On the other hand, since the cushioning member 6 is provided integrally with the annular portion 7, the assembling workability is improved and the vibration and noise of the electric motor can be reduced.

[0019]

As described above, according to 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 and the slots are formed. A pair of insulators opposed to each other are mounted from both end surfaces of the stator core, and a winding is wound around the slot, wherein the tooth portion is provided between each end face of the insulator and the tooth portion of the stator core. A plate-shaped buffer member corresponding to the end face was sandwiched. As a result, it is possible to provide an electric motor with reduced stator vibration and noise.

[Brief description of the drawings]

1A is a front view showing an example of a stator before winding the windings of the present invention and a conventional electric motor, FIG. 1B is a side view, and FIG. 1C is a rear view.

FIG. 2 is a cross-sectional view corresponding to AA of FIG. 1 (b), showing one embodiment of a motor stator according to the present invention.

FIG. 3 is an enlarged sectional view of a main part corresponding to BB of FIG. 2 showing an embodiment of the stator of the electric motor according to the present invention.

FIG. 4B shows an example of a conventional motor stator.
It is sectional drawing corresponding to AA of FIG.

FIG. 5 shows an example of a stator of a conventional electric motor.
It is a principal part expanded sectional view corresponding to FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator core 2 Yoke part 3 Tooth part 4 Slot 5 Insulator 6 Buffer member 7 Annular part 10 Winding

Claims (4)

[Claims] 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 a pair of insulators facing each other are provided on at least an end face of the stator core and the slots. An electric motor mounted from both end surfaces of a stator core and wound around the slots, wherein a plate-like buffer member corresponding to the end surface of the tooth portion is provided between the insulator and each end surface of the tooth portion of the stator core. An electric motor characterized by being sandwiched. 2. The electric motor according to claim 1, wherein the width of the buffer member is wider than the width of a tooth portion around which the winding is wound. 3. The electric motor according to claim 1, wherein the material of the buffer member is rubber having a low elastic modulus. 4. The electric motor according to claim 1, wherein the buffer member is provided integrally with annular portions corresponding to both end surfaces of the yoke portion of the stator core.