JP2005020915A - Yoke housing and motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a yoke housing which can easily expose an armature mounted in the yoke housing by disassembling to a plurality of parts by a compression force operating from an exterior at the recycling time. <P>SOLUTION: The yoke housing 2 is formed by laminating substantially annular core sheets 24. Thus, the respective core sheets 24 are separated by the compression force when the compression force is operated on the yoke housing 2 from the exterior at the recycling time. Accordingly, the armature contained in the yoke housing 2 is easily exposed, the armature can be discovered easily, and the armature is removed easily. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a yoke housing suitable for recycling and a motor using the yoke housing.
[0002]
[Prior art]
In recent years, recycling of automobile parts is becoming popular. Therefore, the automobile to be discarded is cut by a large shredder to form a shredder dust having a predetermined size (for example, 10 [cm] square), and iron is mainly reused from the shredder dust.
[0003]
On the other hand, like a motor used in the power window device disclosed in Patent Document 1, a large number of motors are mounted on an automobile, and the motor is provided with an armature having a copper wire (winding). . Therefore, the copper component is mixed with the shredder dust. As a result, there is a problem that the purity of iron is lowered and the iron cannot be reused.
[0004]
Therefore, in practice, a large amount of shredder dust is confirmed by human eyes, and when shredder dust containing an armature with copper wire is found, the shredder dust is separated and the armature is removed in a separate process. In other words, returning to the iron-based recycling process was performed.
[0005]
[Patent Document 1]
JP-A-2002-034196 [0006]
[Problems to be solved by the invention]
However, when compression force is applied from the outside during recycling, if the yoke housing of the motor is destroyed and the internal armature can be seen, the removal of the armature is easy, but some yoke housings are shredders. In some cases, the material was not broken and simply collapsed so as to close the opening of the housing. In such a case, it cannot be determined from the appearance whether the armature is housed in the yoke housing, so it is difficult to remove the armature, and the shredder dust containing the copper component flows as it is along the iron-based recycling process. Therefore, there was a problem that the purity of iron was lowered.
[0007]
The present invention has been made to solve the above-described problems, and an object thereof is to use a yoke housing that can be easily disassembled into a plurality of parts by a compressive force acting from the outside during recycling, and the yoke housing. It is to provide a motor.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems, the invention according to claim 1 is a yoke housing having at least a cylindrical portion for accommodating an armature having a winding, and includes a plurality of core sheets formed in an annular shape. A cylindrical portion having a gap in which the armature is accommodated is formed by being laminated, and a magnet facing the armature is disposed and fixed on the inner peripheral surface of the cylindrical portion.
[0009]
According to a second aspect of the present invention, in the yoke housing according to the first aspect, the core sheet is laminated in the axial direction, and the magnet is arranged so as to generate magnetism in a cylindrical radial direction.
[0010]
According to a third aspect of the present invention, in the yoke housing according to the first aspect, the end of the magnet in the axial direction is arranged so as not to coincide with the end of the core sheet.
[0011]
According to a fourth aspect of the present invention, in the yoke housing according to any one of the first to third aspects, the core sheet has a non-uniform thickness.
According to a fifth aspect of the present invention, in the yoke housing according to any one of the first to fourth aspects, the core sheet is laminated with a vibration isolating material interposed.
[0012]
According to a sixth aspect of the present invention, in the yoke housing according to any one of the first to fifth aspects, the periphery of the cylindrical portion is resin-molded.
A seventh aspect of the present invention is a motor configured by accommodating an armature having a winding in the yoke housing according to any one of the first to fifth aspects.
[0013]
(Function)
According to the invention described in claim 1, the yoke housing is formed by laminating a plurality of core sheets. Thereby, at the time of recycling, the laminated yoke housings are disassembled into a plurality of parts by the compressive force acting from the outside. Therefore, since the armature accommodated in the yoke housing is easily exposed, the armature can be easily found and the armature can be easily removed.
[0014]
According to the second aspect of the present invention, the magnetic flux of the magnet passes through the yoke housing, that is, each core sheet along the circumferential direction of the yoke housing. Therefore, since the core sheet does not serve as a resistance of the magnetic path, the influence on the magnetic field of the magnet is extremely small, and the influence on the output of a motor using the core sheet can be extremely reduced.
[0015]
The strength against the pressure from the outside of the portion where the magnet is not attached is extremely smaller than that of the portion where the magnet is attached. Therefore, when the end portion of the magnet and the end portion of the adjacent core sheet that is the separation line of the yoke housing coincide with each other, the core sheet is easily separated by the pressure from the outside. However, as in the third aspect of the invention, the end of the magnet and the end of the core sheet do not coincide with each other, so that the core sheet is difficult to separate in normal use.
[0016]
According to the invention described in claim 4, the resonance point when the core sheets having the same thickness are laminated can be shifted, and the generation of sound due to resonance can be prevented.
According to invention of Claim 5, generation | occurrence | production of a sound can be reduced with a vibration isolator.
[0017]
According to the sixth aspect of the present invention, the vibration isolation effect can be obtained by the resin mold and the separation of the core sheet can be prevented.
According to the invention described in claim 7, the motor is configured by accommodating the armature having the winding in the yoke housing described in any one of claims 1-6. Thereby, at the time of recycling, the laminated yoke housing is disassembled into a plurality of parts by the compressive force acting on the motor (yoke housing) from the outside. Therefore, since the armature accommodated in the yoke housing is easily exposed, the armature can be easily found and the armature can be easily removed. In other words, the motor is excellent in recyclability by including such a yoke housing.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
As shown in FIG. 2, a DC motor 1 as a rotating electrical machine has a bottomed cylindrical yoke housing 2, and an end cap 3 is fixed to the opening of the yoke housing 2 with a screw 4. . On the inner side surface of the yoke housing 2, the back surfaces (surfaces in the radial direction) of the plurality of magnets 5 are firmly fixed so that magnetism can pass through the yoke housing 2 from the back surface of the magnets 5. The magnet 5 here means only a permanent magnet that generates magnetism without using a coil or electricity. A bearing 6 is provided at the center of the bottom of the yoke housing 2, and a bearing 7 is provided at the center of the end cap 3.
[0019]
An armature 8 is accommodated in the yoke housing 2. The armature 8 has an output shaft 9 that is rotatably supported by bearings 6 and 7, and a distal end portion of the output shaft 9 protrudes from the end cap 3 to the outside. The armature 8 has a rotor core 10 and a commutator 11 fixed to the output shaft 9, and a winding 12 is wound around the rotor core 10, and the winding 12 is connected to the commutator 11.
[0020]
A brush device 13 is fixed to the end cap 3 by screws 14 on the inner surface thereof. The brush device 13 holds a brush 15 that is in sliding contact with the commutator 11. The end cap 3 is assembled with a power feeding unit 16. The power supply unit 16 supplies power to the brush 15 from the outside. Then, when power is supplied from the power supply unit 16 to the winding 12 of the armature 8 via the brush 15 and the commutator 11, the armature 8 rotates and the output shaft 9 rotates.
[0021]
The yoke housing 2 includes a cylindrical portion 21, an end frame 22, and a fixing portion 23. As shown in FIG. 1B, the cylindrical portion 21 is formed by laminating a core sheet 24 having a predetermined plate thickness formed in an annular shape along the axial direction of the output shaft 9. Each core sheet 24 is formed with a thickness of a length L1 obtained by equally dividing the length L of the cylindrical portion 21 necessary for housing the armature 8. Therefore, the yoke housing 2 is formed with a space for accommodating the armature 8 therein, and the magnet 5 facing the armature 8 is disposed and fixed on the inner peripheral surface.
[0022]
As shown in FIG. 1A, each core sheet 24 includes an annular portion 25 formed in an annular shape and a laminated portion 26 that protrudes radially outward from the annular portion 25. The laminated portion 26 is provided for laminating the plurality of core sheets 24. A plurality of stacked portions 26 are provided, and are arranged at equal intervals along the circumferential direction of the annular portion 25.
[0023]
The end frame 22 includes a circular case portion 27 and a plurality of laminated portions 28 provided on the outer periphery of the case portion 27, and a bearing case 29 that accommodates the bearing 6 is formed at the center of the case portion 27. ing. The laminated portion 26 is provided to integrally fix the end frame 22 to the cylindrical portion 21. The laminated portion 26 is formed in the same shape as the laminated portion 26 of the core sheet 24.
[0024]
The fixing portion 23 is for attaching the yoke housing 2 to the end cap 3, and is formed in a flange shape with respect to the cylindrical portion 21. The fixing part 23, the cylinder part 21, and the end frame 22 are integrally assembled by, for example, rivets fitted and inserted into the laminated part 26. In addition, you may laminate | stack the several core sheet 24 using fastening members, such as a screw, or caulking. Then, the end cap 3 is fixed to the yoke housing 2 by fixing the fixing portion 23 to the end cap 3 with the screw 4.
[0025]
The magnet 5 is disposed so as to be generated in the radial direction of the yoke housing 2 as indicated by an arrow P in FIG. The magnetic flux from the N-pole magnet 5 passes through the yoke housing 2 along the circumferential direction and reaches the S-pole magnet 5. Therefore, the yoke housing 2 divided into the plurality of core sheets 24 in the axial direction does not serve as a resistance of the magnetic path.
[0026]
Further, the magnet 5 is fixed so that the end in the axial direction does not coincide with the end in the axial direction of the core sheet 24. The yoke housing 2 is separated between the core sheets 24. That is, the end of the magnet 5 does not coincide with the separation line of the yoke housing 2. There is a large difference in strength to withstand the force applied from the outside by normal use between the portion where the magnet 5 is in contact and the portion where the magnet 5 is not in contact. Therefore, when the end of the magnet 5 is substantially coincident with the separation line of the yoke housing 2, the adjacent core sheets 24 forming the separation line are easily separated. For this reason, it is difficult to separate between the core sheets 24 by making the end of the magnet 5 not coincide with the separation line of the yoke housing 2.
[0027]
In the motor 1 having such a configuration, when a compression force is applied by a shredder during recycling, the yoke housing 2 in which the core sheets 24 are laminated is compressed and broken. At this time, the core sheet 24 is easily separated by a compressive force in a portion where the magnet 5 is not disposed. Therefore, the motor 1 is separated into a part including the end frame 22, a part including the magnet 5, and a part including the end cap 3. For this reason, the armature 8 accommodated in the yoke housing 2 is easily exposed and can be easily confirmed from the appearance. As a result, the armature 8 having the winding 12 can be easily separated from the metal material such as the yoke housing 2.
[0028]
As described above, the present embodiment has the following effects.
(1) The yoke housing 2 was formed by laminating a substantially annular core sheet 24. Accordingly, when a compression force is applied to the yoke housing 2 from the outside during recycling, the core sheets 24 are separated by the compression force. Therefore, since the armature 8 accommodated in the yoke housing 2 is easily exposed, the armature 8 can be easily found and the armature 8 can be easily removed. That is, by providing such a yoke housing 2, the motor 1 excellent in recyclability can be configured.
[0029]
(2) The yoke housing 2 is formed by laminating a plurality of core sheets 24 divided in the axial direction, and the magnetic flux of the magnet 5 passes through the yoke housing 2 along the circumferential direction of the yoke housing 2. Since such a yoke housing 2 does not become a resistance of the magnetic path by the magnet 5, the influence on the magnetic field of the magnet 5 is extremely small. As a result, the influence on the output of the motor 1 can be extremely reduced.
[0030]
(3) The end portion of the magnet 5 in the axial direction is fixed so as not to coincide with the separation line of the yoke housing 2 (contact portion of the adjacent core sheet 24). Accordingly, since the force acting from the outside by normal use is not concentrated on the separation line of the yoke housing 2, it is difficult to separate the core sheets 24 in normal use.
[0031]
(4) Since the yoke housing 2 is formed by laminating a plurality of core sheets 24 along the axial direction, the length (tube portion) of the yoke housing 2 can be changed by changing the number of core sheets 24 to be laminated. The length L) of 22 can be changed to easily accommodate motors having various yoke housing lengths.
[0032]
(5) By laminating the plurality of core sheets 24 in the axial direction, the radial rigidity of the yoke housing 2 is increased and the yoke housing 2 is less likely to vibrate, so that noise can be prevented.
[0033]
(6) A yoke housing that is not divided in the axial direction has a low rigidity in a portion where no magnet is disposed, and is easily vibrated by a magnetic excitation force, which causes noise. However, in the yoke housing 2 in which the core sheets 24 of the present embodiment are laminated in the axial direction, the resonance point of the yoke housing 2 moves to a higher frequency than that of the conventional housing. For this reason, generation | occurrence | production of the sound by resonance can be reduced.
[0034]
(7) Since the yoke housing 2 is formed by laminating the plurality of core sheets 24, at the contact portion of the core sheet 24 where the torsional vibration generated by the rotational force of the armature 8 when the motor 1 is driven is laminated. It is attenuated, and the anti-vibration effect can be enhanced.
[0035]
In addition, you may change embodiment of this invention as follows.
The configuration of the yoke housing 2 of the above embodiment may be appropriately changed in addition to the above. For example, as shown in FIG. 3, a yoke housing 31 is configured. The cylindrical portion 31a of the yoke housing 31 is formed by laminating a plurality of core sheets 24 with a vibration isolating material 32 having a thickness L2. That is, the yoke housing 31 is formed by laminating sheets of different materials in the axial direction. By interposing the vibration isolator 32 between the core sheets 24, a further anti-vibration effect can be obtained. A vibration damping material may be interposed.
[0036]
Moreover, as shown in FIG. 4, the yoke housing 41 is comprised. The cylinder portion 41a of the yoke housing 41 is formed by stacking core sheets 42 and 43 having different thicknesses in the axial direction. The thickness of the core sheet 42 is set to L3, and the thickness of the core sheet 43 is set to L4 (L3> L4). The yoke housing 41 configured as described above has different thicknesses of the core sheets 42 and 43, and therefore, the resonance point of vibration in each of the core sheets 42 and 43 is shifted, so that generation of sound due to resonance can be prevented. The plurality of core sheets constituting the yoke housing may be set to different thicknesses (non-uniformity).
[0037]
Further, as shown in FIGS. 5A and 5B, a yoke housing 51 is configured. The yoke housing 51 includes a cylindrical portion 54 in which an annular core sheet 52 is laminated in the axial direction, and the plurality of core sheets 52 are molded with a resin 53. The resin 53 can provide an anti-vibration effect and can strengthen the bond between the core sheets 52 to prevent separation during normal use. In addition, you may make the thickness of the core sheet to laminate | stack nonuniform. Moreover, you may laminate | stack the several core sheet from which thickness differs.
[0038]
In the above embodiment, the yoke housings 2, 31, 41, 51 are formed in a bottomed cylindrical shape, but may be formed in a bottomed flat cylindrical shape or a polygonal cylindrical shape.
O You may actualize in the motor of the structure which does not use the fixing | fixed part 23. FIG.
[0039]
【The invention's effect】
As described above in detail, according to the present invention, the internal armature can be easily exposed because it can be decomposed into a plurality of parts by the compressive force acting from the outside during recycling.
[Brief description of the drawings]
FIG. 1A is a front view of a yoke housing, and FIG.
FIG. 2 is a cross-sectional view of a motor according to an embodiment.
FIG. 3 is a side view of another yoke housing.
FIG. 4 is a side view of another yoke housing.
5A is a front view and FIG. 5B is a side view of another yoke housing.
[Explanation of symbols]
L2: thickness, 2, 31, 41, 51 ... yoke housing, 5 ... magnet, 8 ... armature, 12 ... winding, 21, 31a, 41a, 54 ... cylindrical part, 24, 42, 43, 52 ... core Sheet, 32.

Claims (7)

A yoke housing having at least a cylindrical portion for accommodating an armature having a winding;
A plurality of core sheets formed in an annular shape are stacked to form a cylindrical portion having a space in which the armature is accommodated, and a magnet facing the armature is disposed and fixed on the inner peripheral surface of the cylindrical portion. A yoke housing characterized by that. 2. The yoke housing according to claim 1, wherein the core sheets are laminated in an axial direction, and the magnet is disposed so as to generate magnetism in a cylindrical radial direction. 3. The yoke housing according to claim 1, wherein an end portion of the magnet in the axial direction is disposed so as not to coincide with an end portion of the core sheet. The yoke housing according to any one of claims 1 to 3, wherein the core sheet has a non-uniform thickness. The yoke housing according to any one of claims 1 to 4, wherein the core sheet is laminated with an anti-vibration material interposed therebetween. The yoke housing according to claim 1, wherein the cylindrical portion is resin-molded around. A motor characterized in that an armature having a winding is accommodated in the yoke housing according to any one of claims 1 to 6.

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