CN107147250B - Commutator motor, electric blower, and dust collector - Google Patents
Commutator motor, electric blower, and dust collector Download PDFInfo
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- CN107147250B CN107147250B CN201710103536.XA CN201710103536A CN107147250B CN 107147250 B CN107147250 B CN 107147250B CN 201710103536 A CN201710103536 A CN 201710103536A CN 107147250 B CN107147250 B CN 107147250B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
- H02K13/006—Structural associations of commutators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
- H02K13/04—Connections between commutator segments and windings
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- Power Engineering (AREA)
- Motor Or Generator Current Collectors (AREA)
Abstract
The invention relates to a commutator motor, an electric blower and a dust collector. The commutator motor includes: an excitation unit including an excitation core and an excitation winding formed by winding an insulated wire around the excitation core; a commutator including a commutator segment having a structured surface, an engaging layer containing resin, and a resin molded body; a rotating shaft passing through the center of the commutator; an armature including an armature core and an armature winding, wherein the rotating shaft penetrates the center of the armature core, the armature core includes a slot, and the armature winding is formed by winding an insulated wire around the slot; a jumper group including a winding start side jumper as a wiring of a winding start portion of each armature winding and a winding end side jumper as a wiring of a winding end portion of each armature winding, the jumper group being electrically connected to a commutator segment of the commutator, the commutator segment being located in an axial direction of the rotating shaft and at a position extending from the armature core along the axial direction of the rotating shaft; and a brush sliding in contact with the commutator.
Description
Technical Field
The present invention relates to an electric blower mounted on a household vacuum cleaner, a commutator motor used in the field of electric appliances, and a vacuum cleaner.
Background
The rotational speed of a commutator motor used in a household cleaner or the like is about 4 ten thousand rpm (revolutions per minute) to about 5 ten thousand rpm. In the field of motors, a commutator motor used in a household cleaner is one of commutator motors that are most required to be rotationally driven at high speed. A problem of a commutator in a commutator motor related to high-speed rotation driving has been frequently raised in the past.
A representative problem among the problems is that segments of the commutator are peeled off by centrifugal force due to high-speed rotation.
The technique described in japanese patent publication No. 5-38544 relates to a structure of a commutator that can resist high-speed rotation. The commutator described in japanese patent publication No. 5-38544 has been mass-produced from 1990, has appropriate performance and reliability, is highly valued, and has a great industrial value.
However, in the commutator described in japanese patent publication No. 5-38544, cylindrical ceramic cylindrical bodies are embedded between the segments of the commutator, and the crown reaction is generated by the interaction of the cylindrical surfaces of the cylindrical bodies. This produces an effect of resisting the centrifugal force. However, the commutator is complicated in construction.
Fig. 6A is a half sectional view illustrating a direction of a rotation shaft of the commutator of japanese patent publication No. 5-38544. In the commutator 45, the commutator segments 45a are fixedly held by the resin molded body 50. In the armature winding, a winding start portion and a winding end portion thereof are jumper wires. The intermediate portion of the jumper wire is electrically connected to the winding fastening portion (hook portion) 45b, and constitutes a connection point 48. The embedded portion 49 of the commutator segment having the pi-shaped outer shape has a structure for suppressing the separation of the commutator segment, and can resist the high-speed rotation of the commutator motor. Even if the resin molded body 50 is deteriorated by spark heat generated between the commutator and the brush for energizing the commutator, the peeling of the segments is suppressed, and the embedded portion 49 is a measure for the high-speed rotation and the long life of the commutator motor.
Fig. 6B is a sectional view illustrating a plane perpendicular to the direction of the rotation axis of the commutator disclosed in japanese patent publication No. 5-38544. The cylindrical body 53 of ceramic material is disposed in such a manner as to be sandwiched by the adjacent segments 45 a. The effect of resisting the centrifugal force is further enhanced by the arching effect generated by the interaction of the cylindrical surfaces of the cylindrical bodies 53 of the ceramic material. However, the commutator 45 has a complicated structure, and simplification and rationalization of the structure are required.
On the other hand, as a commutator having a simple structure, a commutator described in japanese patent laid-open No. 8-308182 and the like is widely known. The commutator described in Japanese patent laid-open No. 8-308182, etc. has the following structure: a rough surface obtained by knurling for improving the bonding and holding force with a molding material is formed on the inner surface of each commutator segment, so that the peeling of the commutator segment is inhibited. The commutator is characterized by simple construction. However, the commutator described in Japanese patent application laid-open No. 8-308182 has a simple structure in terms of centrifugal force. Therefore, the commutator of a robust structure as described in japanese patent application laid-open No. 8-308182 is not suitable for high-speed rotation of a household vacuum cleaner having a rotational speed of about 4 to about 5 ten thousand rpm.
Disclosure of Invention
For example, in the commutator disclosed in japanese patent publication No. 5-38544, a simple structure can be obtained by removing a cylindrical body of a ceramic material. However, the anti-centrifugal force based on the reverse arching effect obtained by the arrangement of the cylinders of ceramic material is impaired due to the removal of the cylinders of ceramic material. Therefore, some new anti-centrifugal force configuration is required.
As a new centrifugal force resisting structure, the following structure described in Japanese patent laid-open No. 8-308182 and the like is easily conceivable: the surface of the segment is roughened by providing a knurling called a twill obtained by knurling on the surface of the segment, thereby improving the degree of adhesion with the resin portion of the structural material of the commutator. However, the pitch of the concave-convex shape of the knurls called twill is about 0.6mm at the minimum, and the fineness is limited. Therefore, the degree of adhesion between the resin portion of the structural material of the commutator and the segment is also limited. Therefore, the structure in which the surface is roughened by knurling as described in Japanese patent application laid-open No. 8-308182 is not a centrifugal force resistant structure that can be substituted for the structure of the commutator described in Japanese patent publication No. 5-38544.
Further, the commutator segment described in Japanese patent publication No. 5-38544 and the like is a solid wedge-shaped object and is not a flat plate-shaped metal plate suitable for knurling. This causes a problem in knurling.
In view of the above problems, an object of the present invention is to obtain a commutator motor: a novel centrifugal force resisting structure is provided by providing a novel engaging layer on the surface of a segment which is a special-shaped structure such as a wedge.
In order to solve the above problems, the inventors of the present application have made trial and error studies. As a result, it has been found that it is effective to provide a specific engaging layer at the interface between the resin molded body for molding the commutator and the segment, and the segment is preferably made of a specific metal material. The details thereof are described below.
The commutator motor of the present invention comprises: an excitation unit including an excitation core and an excitation winding formed by winding an insulated wire around the excitation core; a commutator including a commutator segment with a structured surface, a resin-containing engaging layer, and a resin molded body; a rotating shaft passing through the center of the commutator; an armature including an armature core and an armature winding, wherein the rotating shaft penetrates the center of the armature core, the armature core has a slot, and the armature winding is formed by winding an insulated wire around the slot; a jumper group including a winding start side jumper as a wiring of a winding start portion of each armature winding and a winding end side jumper as a wiring of a winding end portion of each armature winding, the jumper group being electrically connected to a commutator segment of the commutator, the commutator segment being located in an axial direction of the rotating shaft and at a position extending from the armature core along the axial direction of the rotating shaft; and a brush sliding in contact with the commutator.
According to the present invention, the structured surface formed on the commutator segment by the etchant (etching solution) can be used to greatly increase the equivalent surface area of the commutator segment, and the bonding strength between the commutator segment and the resin molded body of the commutator can be increased through the engaging layer formed of the structured surface and the resin of the resin molded body of the commutator. Therefore, both high-speed rotation and durability can be achieved.
Drawings
Fig. 1 is a partial sectional view showing an electric blower including a commutator motor in embodiment 1 of the present invention.
Fig. 2 is a cross-sectional view of the cross-section shown at 2-2 in fig. 1.
Fig. 3 is a side view showing a main part of a commutator motor according to embodiment 1 of the present invention.
Fig. 4 is an explanatory diagram of a commutator motor in embodiment 1 of the present invention.
Fig. 5 is a diagram showing a segment and an engagement layer of a commutator motor according to embodiment 1 of the present invention.
Fig. 6A is a half sectional view illustrating a direction of a rotation axis of the commutator of japanese patent publication No. 5-38544.
Fig. 6B is a sectional view illustrating a surface perpendicular to the rotation axis direction of the commutator of japanese patent publication No. 5-38544.
Detailed Description
Embodiments of the present invention will be described below with reference to the drawings. In the present embodiment, the present commutator motor of the vacuum cleaner will be described as an example. The present invention is not limited to the following embodiments.
(embodiment mode 1)
Fig. 1 is a partial sectional view showing an electric blower 10 including a commutator motor 11 according to embodiment 1 of the present invention.
The electric blower 10 is configured to have a commutator motor 11 of the present embodiment provided in a substantially cup-shaped end cover 12 having one opening. As shown in fig. 1, the commutator motor 11 includes a stator 30 as a field, a rotor 40 as an armature, and a brush unit 20.
The stator 30 has a field winding 32 formed by winding an insulated wire or the like around a field core 31 formed of a laminated body of electromagnetic steel plates or the like. The field core 31 is formed by laminating a plurality of electromagnetic steel plates having a predetermined shape, for example. The field core 31 has a magnetic pole portion 31a as a magnetic pole on its inner side. The field core 31 has a space portion in which the rotor 40 is disposed. The stator 30 is fixed to the inside of the end cover 12.
The rotor 40 includes an armature core 41, an armature winding 42 formed by winding an insulated wire around a slot provided in the armature core 41, a rotating shaft 43, and a commutator 45. As described above, the armature winding 42 is wound around the armature core 41. A portion of the armature winding 42 led out from the armature core 41 is connected to the commutator 45. The armature core 41 and the commutator 45 are cylindrical, and a rotation shaft 43 is coupled so as to penetrate the center of the armature core 41 and the commutator 45. Both ends of the rotary shaft 43 are rotatably supported by bearings 13. The rotor 40 configured as described above is disposed on the inner circumferential side of the stator 30 in a state where the armature core 41 faces the magnetic pole portion 31a formed in the field core 31.
A brush holder 25 included in the brush unit 20 is fixed to the end cover 12. The brush portion 20 includes a brush holder 25, a brush 21, and a brush spring 27. The brush 21 is made of a carbon brush material such as artificial graphite containing a solid lubricant. The brush 21 is held in the brush holder 25 and is pressed toward the commutator 45 by the brush spring 27. The commutator motor 11 has a pair of brush portions 20, and the pair of brushes 21 are in contact with the commutator 45. The commutator motor 11 is configured as described above.
In the electric blower 10, a fan case 15 is attached so as to cover the opening side of the end cover 12. The rotary shaft 43 of the rotor 40 extends from the opening of the end cover 12 into the fan case 15. The centrifugal fan 16 is attached to the tip end of the rotating shaft 43. An air guide 17 is installed between the centrifugal fan 16 and the opening of the end cover 12. In this way, the centrifugal fan 16 and the air guide 17 are disposed in the fan case 15.
In the electric blower 10 configured as described above, when electric power is supplied from the outside to the commutator motor 11, armature current flows to the armature winding 42 via the brushes 21 and the commutator 45. At the same time, the field current flows to the field winding 32 of the stator 30. A force is generated between the armature current flowing through the armature winding 42 and the magnetic flux generated by the field current in the field core 31, and the rotor 40 rotates. As the rotor 40 rotates, the centrifugal fan 16 rotates. The rotation of the rotor 40 draws air in from the air inlet 18, and the air flows into the centrifugal fan 16, passes through the inside of the end cover 12, and is discharged to the outside of the electric blower 10.
Next, a more detailed structure of the commutator motor 11 will be described.
Fig. 2 is a sectional view showing a section 2-2 in fig. 1. Fig. 2 shows the main structure of the commutator 45 and the brush portion 20 as viewed from the extending direction of the rotating shaft 43.
As shown in fig. 2, the commutator 45 has a plurality of segments 45a formed at equal intervals around the commutator. Each segment 45a is made of metal and supplies current to the armature winding 42 by contacting the brush 21.
In the pair of brush units 20, the brush holder 25 is disposed to face the commutator 45 in a radial direction perpendicular to the rotating shaft 43. The brush holder 25 has a cylindrical shape and has an opening 29 at a position facing the commutator 45. The brush 21 and the brush spring 27 are disposed in the brush holder 25.
The brush spring 27 is formed of a spiral spring. The brush spring 27 has one end abutting against the reverse contact surface of the brush 21 and the other end abutting against the wall surface on the outer peripheral side of the brush holder 25. In the brush holder 25, a brush spring 27 is disposed to press the brush 21 toward the commutator 45 through the opening portion 29. That is, the contact surface of the brush 21 is pressed against the commutator 45 by the elastic force of the brush spring 27. Thereby, the brush 21 is electrically connected to the segment 45a formed in the commutator 45.
Thus, the brush 21 is moved in the radial direction by the brush spring 27 in the brush holder 25, and slides in contact with the commutator 45. A connection line (single-ended jumper) 28 for supplying current to the brush 21 is connected to the brush 21. The connection wire 28 passes through the spiral inside of the brush spring 27, and has one end joined to the opposite contact surface of the brush 21 and the other end welded to the wall surface on the outer peripheral side of the brush holder 25.
Fig. 3 is a side view showing a main part of a commutator motor 11 according to embodiment 1 of the present invention.
As shown in fig. 3, the armature core 41 and the commutator 45 are press-fitted to the rotary shaft 43. The armature core 41 and the commutator 45 are engaged with the rotary shaft 43 by interference fit or the like. The armature core 41 includes an armature winding 42 as a winding body of an insulated wire. A part of the wound armature winding 42 is drawn out to the commutator 45 side as a plurality of jumper wires 42 a. A winding fastening portion (hook portion) 45b having a bent shape is formed at an end portion of each segment 45a on the armature core 41 side. The jumper wires 42a are engaged with the winding wire fastening portions 45b, respectively. Thereby, the secondary brush 21 is electrically connected to the armature winding 42 via the commutator segment 45 a.
The jumper wire 42a includes a winding start-side jumper wire as a wiring of a winding start portion of each armature winding body and a winding end-side jumper wire as a wiring of a winding end portion of each armature winding body.
The armature winding 42 is wound around the armature core 41. The portion of the armature winding 42 protruding from the armature core 41 in the axial direction of the rotating shaft 43 is the coil end 35.
The armature core 41 includes a plurality of teeth 44, and a slot 46 is provided between adjacent teeth 44. The rotor 40 in the present embodiment has 12 slots 46 because it has 12 armature cores 41. The armature winding 42 is wound by a so-called distributed winding method. The commutator 45 includes 24 segments 45 a. Each of the segments 45a includes a winding fastening portion 45 b. The terminal of the jumper wire 42a is connected to the winding fastening portion 45 b.
The winding start portion and the winding end portion of the insulated wire forming the armature winding 42 are jumper wires. The jumper wire is engaged with the winding fastening portion 45b of the commutator 45. Between the coil end 35 and the commutator 45, there is an aggregate of jumper wires connecting the armature winding 42 and the winding fastening portion 45b of the commutator 45. The assembly of the jumper wires is formed by wiring the armature winding 42 which is wound in an excessive density. The aggregate of the jumpers will be referred to as a jumper group 42b hereinafter.
Fig. 4 is an explanatory diagram of a commutator 45 of the commutator motor 11 according to embodiment 1 of the present invention. The commutator 45 includes a plurality of commutator segments 45a having a structured surface and a resin molded body 50. The segment 45a has a substantially rectangular or pi-shaped cross-sectional shape in the direction of the rotation axis of the commutator. The cross-sectional shape of the segment in a cross-section perpendicular to the direction of the rotation axis of the commutator is a sector-shaped cross-sectional shape having an arc at a portion where the segment slides in contact with the brush, and the sector-shaped cross-sectional shape includes a constricted portion.
The segment 45a has a segment embedding portion 49 having a pi-shaped outer shape. The commutator segment 45a includes a winding fastening portion 45 b. In the armature winding, the winding start portion and the winding end portion are jumpers, and the intermediate portions of the jumpers are electrically connected to the winding fastening portions 45b to form connection points 48. Slits 47 are provided between adjacent segments 45a to insulate the segments 45 a.
The surface layer portion of the segment 45a is provided with a structured surface by at least one of an oxidation action and a reduction action by 1 kind or 2 or more kinds of etchants (etching solutions). The structured surface is a population of asperity structures comprising a tip portion and a base portion of the tip portion. The protruding end portion is located in a range of 0.1 μm to 10 μm from the base portion. The structured surface is integrated with the resin of the resin molded body of the commutator to constitute an engagement layer.
Of course, the approximate layer thickness of the engagement layer is in the range of 0.1 μm to 10 μm. The structured surface provided on the surface layer portion of the segment 45a greatly increases the equivalent surface area of the segment 45 a. The structural surface and the engagement layer made of resin of the resin molded body of the commutator can increase the bonding strength between the commutator segment 45a and the resin molded body of the commutator 45. When the approximate layer thickness of the engaging layer is 0.1 μm or less, the effect of increasing the adhesive strength is poor. The thickness of the adhesion layer is preferably 10 μm or less, and more preferably 5 μm or less.
Fig. 5 is a diagram showing a segment 45a and an engaging layer 52 of a commutator motor 11 according to embodiment 1 of the present invention. The convex-concave structure group 51 on the structured surface and the resin of the resin molded body 50 are engaged with each other to constitute an engagement layer 52. Fig. 5 shows a micrograph of the resin molded body 50 taken and the filler 54 as a cloud point also taken.
The resin of the resin molded body 50 of the commutator 45 is a phenolic resin containing a filler. The specific gravity of the phenolic resin is about 1.69 to 1.95. The specific gravity of the phenolic resin after removing the filler is about 1.21 to 1.3. Therefore, in the engaging layer having a thickness of 0.1 μm to 10 μm, the phenolic resin containing almost no filler accounts for the volume ratioBy about 50%. Thus, the amount of the phenolic resin was 60.5. mu.g/cm2To 650. mu.g/cm2Left and right. Further, the amount of the phenolic resin in the engaging layer having a thickness of 0.1 μm to 5 μm is 60.5. mu.g/cm2To 325. mu.g/cm2Left and right. Physically, the filler added to the phenolic resin does not enter the uneven structure group 51 on the structured surface, and has the above value.
The filler is incorporated in the engaging layer having a thickness of 0.1 μm to 10 μm as follows. The phenolic resin containing the filler occupies about 50% of the volume ratio of the engaging layer as described above. Thus, the amount of the phenolic resin was 98. mu.g/cm2To 975. mu.g/cm2Left and right. In addition, the amount of the phenolic resin in the engaging layer having a thickness of 0.1 μm to 5 μm is 98 μ g/cm2To 487.5. mu.g/cm2Left and right.
The structured surface of the segment 45a and the engagement layer 52 in embodiment 1 are provided on all or part of the interface between the segment 45a and the resin molded body 50, which includes a directional component in the shear direction (shear direction) that is substantially the same direction as the centrifugal force direction at the time of the rotation of the commutator. The structured surface of the segment 45a and the engagement layer 52 in embodiment 1 are provided on all or part of the interface between the segment 45a and the resin molded body 50, which includes a directional component in the tensor direction with respect to the centrifugal force direction at the time of commutator rotation.
The structured surface obtained by using at least one of the oxidation action and the reduction action of the etchant (etching solution) in embodiment 1 is obtained by immersing the segment 45a in the etchant (etching solution). Therefore, the commutator segment 45a can be processed over the entire circumference at one time. In the case of knurling, the manufacturing cost increases every time a portion to be processed is increased. Therefore, the method of obtaining a structured surface by using at least one of the oxidation action and the reduction action of the etchant (etching solution) can suppress the cost of the production process.
On the other hand, in the manufacture of the commutator motor 11, after the commutator 45 is connected to and assembled with the rotating shaft 43, a manufacturing process of cutting the outer peripheral surface of the commutator 45 is generally performed in order to optimize the concentricity between the rotating shaft 43 and the outer periphery of the commutator 45. In the present embodiment, the outer peripheral surface of the commutator 45 is cut to a depth of about 25 to 50 μm in the radial direction from the surface. Therefore, even if the structured surface having a shape of 0.1 μm to 10 μm is formed over the entire circumference by the etchant (etching solution) of the present embodiment, the surface of the segment 45a in contact with the brush 21 can be smoothed by cutting the outer circumferential surface of the segment 45. Therefore, the sliding of the brush 21 and the commutator 45 is not affected.
The segment 45a of the present embodiment is preferably a copper alloy containing about 0.01 to 1 wt% of silver. Thus, a structured surface can be formed in a more efficient manner than when a structured surface is formed using an etchant (etching solution) for a high-purity copper material (copper content of about 99.9% to 99.99%) such as general electrolytic copper. The segment 45a in the present embodiment contains silver in an amount of about 0.01 to 1 wt%. Thus, a structured surface can be formed in a more efficient manner than when a structured surface is formed using an etchant (etching solution) for a high-purity copper material (copper content of about 99.9% to 99.99%) such as general electrolytic copper.
This is caused by the difference in reaction conditions between the oxidation and reduction by the etchant (etching solution) with the silver component and the copper component contained in the segment 45 a. In addition, by using a silver-containing copper alloy for the segment 45a, the heat resistance and durability can be improved as compared with a high-purity copper material (copper content of about 99.9% to 99.99%) such as general electrolytic copper. Therefore, both high-speed rotation and durability can be achieved. In addition, conventional copper materials such as copper alloys and electrolytic copper contain a small amount of various unavoidable impurities.
In the present embodiment, an aqueous solution containing sulfuric acid and hydrogen peroxide is used as the etchant (etching solution), but an etchant (etching solution) containing other components may be used.
The cross-sectional shape of the segment 45a in the present embodiment includes a substantially rectangular or pi-shaped cross-sectional shape in the direction of the rotation axis of the commutator 45. The cross-sectional shape of the segment 45a in a cross section perpendicular to the direction of the rotation axis of the commutator 45 is a sector-shaped cross-sectional shape having an arc at a portion where the segment slides in contact with the brush, and has a concave portion at an opposite side portion of the sector, and the sector-shaped cross-sectional shape includes a constricted portion. The sector shape of the cross-sectional shape of the segment piece 45a in the cross-section perpendicular to the direction of the rotation axis of the commutator 45 may be replaced with a T-shaped cross-sectional shape, an コ -shaped cross-sectional shape, a semi-cylindrical cross-sectional shape, a substantially rectangular cross-sectional shape, a comb-tooth-shaped cross-sectional shape, or a wedge-shaped cross-sectional shape.
As described above, the commutator motor 11 of the present embodiment includes: a field part including a field core 31 and a field winding 32 formed by winding an insulated wire around the field core 31, and corresponding to the stator 30; a commutator 45 including a commutator segment 45a having a structured surface, an engaging layer 52 containing resin, and a resin molded body 50; a rotating shaft 43 penetrating the center of the commutator 45; an armature including an armature core 41 and an armature winding 42, the armature core 41 having a slot 46, the armature winding 42 being formed by winding an insulated wire around the slot 46, and a rotating shaft 43 penetrating the center of the armature core 41 corresponding to the rotor 40; a jumper wire group 42 including a winding start side jumper wire as a wiring of a winding start portion of each armature winding and a winding end side jumper wire as a wiring of a winding end portion of each armature winding, the jumper wire group 42 being electrically connected to a commutator segment 45a of the commutator 45, the commutator segment 45a being located in an axial direction of the rotating shaft 43 and at a position extending from the armature core 41 along the axial direction of the rotating shaft 43; and a brush 21 that slides in contact with the commutator 45.
Thus, the commutator motor 11 of the present embodiment can rotate at a constant speed or at a higher speed than a commutator motor including a conventional commutator by including the commutator 45.
If the following steps are carried out: the thickness of the engaging layer 52 is 0.1 μm or more and 10 μm or less.
If the following steps are carried out: the thickness of the engaging layer 52 is 0.1 μm to 10 μm, and the amount of resin of the engaging layer 52 is 60.5 μ g/cm2Above 650 [ mu ] g/cm2The following.
If the following steps are carried out: the thickness of the engaging layer 52 is 0.1 μm or more and 5 μm or less.
If the following steps are carried out: the thickness of the engaging layer 52 is 0.1 μm to 5 μm, and the amount of resin of the engaging layer 52 is 60.5 μ g/cm2Above 325 mu g/cm2The following.
If the following steps are carried out: the segment 45a contains at least copper as a main component, silver as an auxiliary component, and unavoidable impurities, and the content of silver as the auxiliary component is 0.01 wt% or more and 1 wt% or less.
The engaging layer 52 may be provided on all or a part of the interface between the segment 45a and the resin molded body 50, including a directional component in the shearing direction substantially in the same direction as the centrifugal force direction when the commutator 45 rotates.
The engaging layer 52 may be provided on all or a part of the interface between the segment 45a and the resin molded body 50, which includes a directional component in the tensor direction with respect to the centrifugal force direction when the commutator 45 rotates.
The cross-sectional shape of the segment 45a in a cross section perpendicular to the direction of the rotation axis of the commutator 45 may include a sector-shaped cross-sectional shape having an arc at a portion that slides in contact with the brush 21.
The cross-sectional shape of the segment 45a in a cross section perpendicular to the direction of the rotation axis of the commutator 45 may be a sector-shaped cross-sectional shape having an arc at a portion that slides in contact with the brush 21, and a concave portion may be provided at an opposite side portion of the sector-shaped cross-sectional shape, and the sector-shaped cross-sectional shape may include a constricted portion.
The cross-sectional shape of the segment 45a in a cross section perpendicular to the direction of the rotation axis of the commutator 45 may include a T-shaped cross-sectional shape at a portion where the segment slides in contact with the brush 21.
The cross-sectional shape of the segment 45a in a cross section perpendicular to the direction of the rotation axis of the commutator 45 may include an コ -shaped cross-sectional shape in a portion where the segment slides in contact with the brush 21.
The cross-sectional shape of the segment 45a in a cross section perpendicular to the direction of the rotation axis of the commutator 45 may include a semi-cylindrical cross-sectional shape in a portion that slides in contact with the brush 21.
The cross-sectional shape of the segment 45a in a cross section perpendicular to the direction of the rotation axis of the commutator 45 may include a substantially rectangular cross-sectional shape at a portion where the segment slides in contact with the brush 21.
The cross-sectional shape of the segment 45a in the cross section perpendicular to the direction of the rotation axis of the commutator 45 may include a comb-tooth-like cross-sectional shape in the portion that slides in contact with the brush 21.
The cross-sectional shape of the segment 45a in a cross section perpendicular to the direction of the rotation axis of the commutator 45 may include a wedge-shaped cross-sectional shape at a portion where the segment slides in contact with the brush 21.
The cross-sectional shape of the segment 45a in the same direction as the direction of the rotation axis of the commutator 45 may include a substantially rectangular or pi-shaped cross-sectional shape.
In the electric blower and the vacuum cleaner including the commutator motor 11 in the present embodiment, the commutator 45 is provided, so that the electric blower and the vacuum cleaner including the conventional commutator can be rotated at a high speed at a constant speed or higher.
As described above, the commutator motor according to the present invention is useful for a commutator motor that can achieve both high-speed rotation and long life, and various electric devices using the commutator motor, and is industrially valuable.
Claims (19)
1. A commutator motor comprising:
an excitation unit including an excitation core and an excitation winding formed by winding an insulated wire around the excitation core;
a commutator comprising a resin molded body and a commutator segment having a structured surface;
a rotating shaft penetrating the center of the commutator;
an armature including an armature core and an armature winding, the rotating shaft penetrating the center of the armature core, the armature core having a slot, the armature winding being formed by winding an insulated wire around the slot;
a jumper group including a winding start side jumper as a wiring of a winding start portion of each armature winding and a winding end side jumper as a wiring of a winding end portion of each armature winding, the jumper group being electrically connected to the commutator segment of the commutator, the commutator segment being located in an axial direction of the rotating shaft and at a position extending from the armature core along the axial direction of the rotating shaft; and
a brush sliding in contact with the commutator,
wherein the structured surface is of a convex-concave structure and is formed on the side surface of the commutator segment in the rotation direction,
the convex-concave structure and the resin of the resin molded body are engaged with each other to form an engagement layer.
2. The commutator motor according to claim 1,
the thickness of the adhesion layer is 0.1 μm or more and 10 μm or less.
3. The commutator motor according to claim 1,
the thickness of the adhesion layer is 0.1 μm or more and 10 μm or less,
the amount of the resin of the engaging layer was 60.5. mu.g/cm2Above 650 [ mu ] g/cm2The following.
4. The commutator motor according to claim 1,
the thickness of the adhesion layer is 0.1 μm or more and 5 μm or less.
5. The commutator motor according to claim 1,
the thickness of the adhesion layer is 0.1 to 5 [ mu ] m,
the amount of the resin of the engaging layer was 60.5. mu.g/cm2Above 325 mu g/cm2The following.
6. The commutator motor according to claim 1,
the commutator segment contains at least copper as a main component, silver as an auxiliary component, and unavoidable impurities, and the content of silver as the auxiliary component is 0.01 wt% or more and 1 wt% or less.
7. The commutator motor according to claim 1,
the engaging layer is provided on all or a part of an interface between the commutator segment and the resin molded body, the interface including a directional component in a shearing direction substantially the same direction as a centrifugal force direction when the commutator rotates.
8. The commutator motor according to claim 1,
the engaging layer is provided on all or a part of an interface between the commutator segment and the resin molded body, the interface including a directional component in a tensor direction with respect to a centrifugal force direction when the commutator rotates.
9. The commutator motor according to claim 1,
the cross-sectional shape of the segment in a cross section perpendicular to the direction of the rotation axis of the commutator includes a sector-shaped cross-sectional shape having an arc at a portion that slides in contact with the brush.
10. The commutator motor according to claim 1,
the segment has a sector-shaped cross-sectional shape having an arc at a portion where the segment slides in contact with the brush, and has a concave portion at an opposite side of the sector, and the sector-shaped cross-sectional shape includes a constricted portion.
11. The commutator motor according to claim 1,
the cross-sectional shape of the segment in a cross section perpendicular to the direction of the rotation axis of the commutator includes a T-shaped cross-sectional shape at a portion where the segment slides in contact with the brush.
12. The commutator motor according to claim 1,
the cross-sectional shape of the segment in a cross section perpendicular to the direction of the rotation axis of the commutator includes an コ -shaped cross-sectional shape at a portion where the segment slides in contact with the brush.
13. The commutator motor according to claim 1,
the cross-sectional shape of the segment in a cross section perpendicular to the direction of the rotation axis of the commutator includes a semi-cylindrical cross-sectional shape at a portion where the segment slides in contact with the brush.
14. The commutator motor according to claim 1,
the cross-sectional shape of the segment in a cross section perpendicular to the direction of the rotation axis of the commutator includes a substantially rectangular cross-sectional shape at a portion where the segment slides in contact with the brush.
15. The commutator motor according to claim 1,
the cross-sectional shape of the segment in a cross section perpendicular to the direction of the rotation axis of the commutator includes a comb-tooth-shaped cross-sectional shape at a portion where the segment slides in contact with the brush.
16. The commutator motor according to claim 1,
the cross-sectional shape of the segment in a cross section perpendicular to the direction of the rotation axis of the commutator includes a wedge-shaped cross-sectional shape at a portion where the segment slides in contact with the brush.
17. The commutator motor according to claim 1,
the cross-sectional shape of the segment in the same direction as the direction of the rotation axis of the commutator includes a substantially rectangular or pi-shaped cross-sectional shape.
18. An electric blower comprising the commutator motor according to claim 1.
19. A vacuum cleaner comprising the commutator motor according to claim 1.
Applications Claiming Priority (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-038512 | 2016-03-01 | ||
| JP2016038512 | 2016-03-01 | ||
| JP2016038511 | 2016-03-01 | ||
| JP2016038513 | 2016-03-01 | ||
| JP2016-038513 | 2016-03-01 | ||
| JP2016-038511 | 2016-03-01 | ||
| JP2016-044163 | 2016-03-08 | ||
| JP2016044163A JP6660521B2 (en) | 2016-03-01 | 2016-03-08 | Commutator motor element, commutator motor, electric blower, vacuum cleaner |
| JP2017015547A JP2017158424A (en) | 2016-03-01 | 2017-01-31 | Commutator motor element, commutator motor, electric blower and cleaner |
| JP2017-015547 | 2017-01-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107147250A CN107147250A (en) | 2017-09-08 |
| CN107147250B true CN107147250B (en) | 2020-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710103536.XA Active CN107147250B (en) | 2016-03-01 | 2017-02-24 | Commutator motor, electric blower, and dust collector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107147250B (en) |
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| US5124609A (en) * | 1990-05-31 | 1992-06-23 | Makita Corporation | Commutator and method of manufacturing the same |
| JPH09247904A (en) * | 1996-03-06 | 1997-09-19 | Hitachi Ltd | Commutator and commutator motor |
| JP2002051506A (en) * | 2000-08-02 | 2002-02-15 | Hitachi Chem Co Ltd | Commutator for motor, method of manufacturing motor and commutator for motor |
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| CN101183766A (en) * | 2006-11-13 | 2008-05-21 | 乐金电子(天津)电器有限公司 | Motor of commutator rectifier for preventing insulation varnish leakage structure |
| CN101675576A (en) * | 2007-05-07 | 2010-03-17 | 松下电器产业株式会社 | Mold rectifier and rectification motor using the same |
| CN101924311A (en) * | 2009-06-09 | 2010-12-22 | 重庆川仪自动化股份有限公司 | Alkali metal-containing silver-copper-nickel sliding electrical contact material |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4376254A (en) * | 1981-06-10 | 1983-03-08 | General Motors Corporation | Annular molded article secured to a shaft |
| US5124609A (en) * | 1990-05-31 | 1992-06-23 | Makita Corporation | Commutator and method of manufacturing the same |
| JPH09247904A (en) * | 1996-03-06 | 1997-09-19 | Hitachi Ltd | Commutator and commutator motor |
| JP2002051506A (en) * | 2000-08-02 | 2002-02-15 | Hitachi Chem Co Ltd | Commutator for motor, method of manufacturing motor and commutator for motor |
| CN1698241A (en) * | 2003-02-14 | 2005-11-16 | 科莱克特集团公司 | Commutator for an electric machine |
| CN101183766A (en) * | 2006-11-13 | 2008-05-21 | 乐金电子(天津)电器有限公司 | Motor of commutator rectifier for preventing insulation varnish leakage structure |
| CN101675576A (en) * | 2007-05-07 | 2010-03-17 | 松下电器产业株式会社 | Mold rectifier and rectification motor using the same |
| CN101924311A (en) * | 2009-06-09 | 2010-12-22 | 重庆川仪自动化股份有限公司 | Alkali metal-containing silver-copper-nickel sliding electrical contact material |
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| Publication number | Publication date |
|---|---|
| CN107147250A (en) | 2017-09-08 |
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