JP2018074764A - Commutator electric motor element, commutator electric motor, electric blower, and cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a commutator including a resin molding body which has a new anti-centrifugal force structure by giving a new structure for integrally holding with the resin molding body to the outer periphery portion of a commutator piece.SOLUTION: A commutator 210 includes: a commutator piece 230; and a resin molding body 240. The commutator 210 has plural commutator pieces 230 extending along the shaft center which are positioned with a predetermined gap in a circumferential direction around the shaft center 220 and each of which is held by the resin molding body 240. The resin molding body 240 is formed of a resin having insulation property. For example, a thermosetting resin such as an epoxy resin and a phenol resin is employed. The commutator 210 has plural slit portions 250 each of which is positioned between neighboring plural commutator pieces 230.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a commutator motor element included in an electric blower mounted on a household vacuum cleaner and a commutator motor element included in a commutator motor used in the electrical equipment field.

  The rotation speed of a commutator motor element used for a household vacuum cleaner or the like is about 40,000 rpm to about 50,000 rpm, and is one of the fields in which high-speed rotation driving is performed in the motor field. Due to this high-speed rotation drive, many problems of commutators in the commutator motor element have been conventionally proposed.

  Among these problems, a typical one is a countermeasure technique against separation of the commutator piece of the commutator by centrifugal force due to high-speed rotation.

  And the technique described in patent document 1 is related with the structure of the commutator which can endure high-speed rotation. The commutator according to the technique described in Patent Document 1 is produced in large quantities from around 1990 to the present, and there is no excess or deficiency in performance and reliability. It ’s great.

  However, the commutator according to the technique described in Patent Document 1 embeds a cylindrical body made of a cylindrical ceramic material between each commutator piece of the commutator, and reverse arch action by the interaction of the cylindrical surface of each cylindrical body. The structure was complicated by utilizing the effect of resisting centrifugal force.

  FIG. 10 is a schematic diagram for simply explaining a commutator according to the technique described in Patent Document 1. FIG. As shown in the figure, in the commutator 45, the commutator piece 45 a is held and fixed by a resin molded body 50. Further, in the armature winding, the winding start portion and the winding end portion become a connecting wire, and the intermediate portion of the connecting wire is electrically connected to the winding fastening portion (hook portion) 45b to constitute a connection point 48. To do. The embedded portion 49 of the commutator piece having a π-shaped outer shape is a structure that suppresses the separation of the commutator piece, and can withstand high-speed rotation of the commutator motor. Further, even if the resin molded body 50 deteriorates due to the spark heat generated between the commutator and the brush that energizes the commutator, the commutator pieces are prevented from peeling off, and the commutator motor can be rotated at a higher speed and have a longer service life. It is also a corresponding structure. And the cylindrical body 53 by a ceramic material is arrange | positioned in the aspect pinched by the adjacent commutator piece 45a. The effect of resisting centrifugal force is further enhanced by creating a reverse arch action by the interaction of the cylindrical surface of the cylindrical body 53 with this ceramic material. However, the structure of the commutator 45 of the conventional example has a difficulty in being complicated, and there has been a demand for simplification and rationalization of the structure.

  On the other hand, a commutator having a simple structure is widely known as described in Patent Document 2 or the like. The commutator described in Patent Document 2 and the like has a structure in which a rough surface is formed on the inner surface of each commutator piece by a knurling process to improve the bonding holding force with the molding material, and the commutator piece is prevented from peeling off. It is characterized by a simple structure. However, with respect to centrifugal force, the commutator described in Patent Document 2 has a simple structure, and therefore, a commutator having a robust structure as described in Patent Document 2 and the like has a rotational speed of about 40,000 rpm. It is not suitable for high-speed rotation operation of household vacuum cleaners that reach about 50,000 rpm.

Japanese Patent Publication No. 5-38544 JP-A-8-308182

  Therefore, for example, in the configuration of the commutator described in Patent Document 1, a simple structure can be obtained by removing a cylindrical body made of a ceramic material. However, by removing the cylindrical body made of the ceramic material, the anti-centrifugal force structure due to the reverse arch action obtained by the arrangement of the cylindrical body made of the ceramic material is damaged, and some new anti-centrifugal force structure is required.

  As a new anti-centrifugal force structure, the commutator constituent material is provided by roughening the surface of the commutator piece described in Patent Document 2 or the like with a knurled surface called knurled by knurling. The structure which raises the close_contact | adherence degree with this resin part is easily recalled. However, the pitch of the concavo-convex shape of the knurl called “Aya” is about 0.6 mm at the minimum, and there is a limit to the fineness. For this reason, the degree of adhesion between the resin portion of the commutator constituent material and the commutator piece is also limited, and the roughening configuration by knurling described in Patent Document 2 and the like is described in Patent Document 1. It is not an anti-centrifugal force structure that can replace the child structure.

  Moreover, since the commutator piece described in patent document 1 etc. is a wedge-shaped solid object and is not a flat metal plate suitable for knurl processing, performing knurling itself becomes a problem.

  In view of the above-mentioned problems, etc., the present invention provides a commutator motor element having a new anti-centrifugal force structure by providing a new engaging portion on the non-sliding surface of the commutator piece. The purpose is to obtain.

  In order to solve the above-mentioned problems, the inventors of the present application have conducted trial and error and intensively studied. And it discovered that the structure by the resin piece of a commutator and the some standing piece part (fin) provided in the non-sliding surface of a commutator piece was suitable. Details are described below.

A first invention for solving the problem includes a field portion, a plurality of commutator pieces having a plurality of standing pieces (fins) on a non-sliding surface, and the non-sliding of each of the plurality of commutator pieces. A commutator including a moving surface and a resin molding that is in close contact with the plurality of standing pieces (fins);
A rotating shaft for locking the commutator;
An armature core fixed to the rotating shaft;
An armature including an armature winding composed of a wound body group of insulated wires in the armature core; and
A winding start side crossover wire that is a wiring of a winding start portion of each winding body of the winding body group;
A winding end side connecting wire that is a wiring of a winding end portion of each wound body of the wound body group;
The winding start side crossover wire electrically connected to the commutator piece of the commutator which is in the longitudinal direction of the rotating shaft and is spaced apart from the armature core along the longitudinal direction of the rotating shaft; An armature structure including the winding end side crossover wire;
A brush that contacts and slides with the commutator, and a commutator motor element,
Each of the plurality of standing piece portions (fins) constitutes a standing piece portion (fin) group arranged in a row parallel to each other, and the row direction of the standing piece portion (fin) group and the longitudinal direction of the rotation shaft Are in the same direction,
Furthermore,
The intermediate portion located between the base of each of the plurality of standing pieces (fins) and the tip of each of the plurality of standing pieces (fins) has a base of each of the plurality of standing pieces (fins). It is a commutator motor element including a configuration that protrudes in the backward direction side with respect to the rotational direction of the rotating shaft from the position and the position of the tip of each of the plurality of standing piece portions (fins).

Moreover, 2nd invention is a commutator motor element of 1st invention,
The intermediate portion located between the base of each of the plurality of standing pieces (fins) and the tip of each of the plurality of standing pieces (fins) has a base of each of the plurality of standing pieces (fins). Instead of the position and the position of the tip of each of the plurality of standing piece parts (fins), instead of the configuration protruding in the backward direction side with respect to the rotation direction of the rotation shaft,
The intermediate portion located between the base of each of the plurality of standing pieces (fins) and the tip of each of the plurality of standing pieces (fins) has a base of each of the plurality of standing pieces (fins). It is a commutator electric motor element including a configuration that protrudes to the same direction as the rotational direction of the rotating shaft from the position and the position of the tip of each of the plurality of upright pieces (fins).

  According to a third aspect of the present invention, in the commutator motor element of the first aspect, a cross-sectional shape of each of the plurality of standing piece portions (fins) in a plane perpendicular to the longitudinal direction of the rotating shaft is an arc shape or a bent shape. A commutator motor element including a configuration that is in shape.

  According to a fourth aspect of the present invention, in the commutator motor element of the first aspect, the cross-sectional shape of each of the plurality of standing piece portions (fins) in a plane perpendicular to the longitudinal direction of the rotating shaft is a wave shape. A commutator motor element including

  According to a fifth aspect of the present invention, in the commutator motor element of the first aspect, each of the plurality of standing piece portions (fins) in a plane perpendicular to the longitudinal direction of the rotating shaft has a wave shape and The shape of the wave-like wave crest is a commutator motor element including at least a curved shape.

  According to a sixth aspect of the present invention, in the commutator motor element of the first aspect, each of the plurality of standing piece portions (fins) in a plane perpendicular to the longitudinal direction of the rotating shaft is wavy and The wavy wave crest portion is a commutator motor element including at least a bent shape.

  According to a seventh aspect of the present invention, in the commutator motor element of the first aspect, each of the plurality of standing piece portions (fins) constitutes a standing piece portion (fin) group arranged in a row parallel to each other, and The structure includes a configuration in which the direction of the rows of the standing piece portions (fins) and the longitudinal direction of the rotation shaft are the same direction, and further includes a plurality of the standing piece portions (fins) group, Each is a commutator motor element including a configuration that is separated from each other in the longitudinal direction of the rotating shaft.

  Further, an eighth aspect of the present invention is the commutator motor element according to the first aspect of the present invention, in which the tip portion of each of the plurality of standing piece portions (fins) is larger than the thickness dimension of the base portion of each of the plurality of standing piece portions (fins). The commutator motor element includes a configuration having a larger thickness dimension.

  According to a ninth aspect of the present invention, in the commutator motor element according to the first aspect of the present invention, the thickness of the base portion of each of the plurality of standing piece portions (fins) is less The commutator motor element includes a configuration having a smaller thickness dimension.

  According to a tenth aspect of the present invention, in the commutator motor element of the first aspect, the thickness dimension of the base of each of the plurality of standing pieces (fins) and the tip of each of the plurality of standing pieces (fins) The thickness dimension is a commutator motor element including a configuration that is substantially equal to each other.

  An eleventh aspect of the present invention is the commutator motor including the commutator motor element according to the first aspect of the present invention, wherein the field magnet section includes a field core and a pair of insulated wires wound around the field core. A commutator motor including a field winding.

  The twelfth invention is a commutator motor including the commutator motor element of the first invention, wherein the field magnet portion includes a permanent magnet.

  A thirteenth invention is an electric blower including the commutator motor element of the first invention.

  The fourteenth invention is a vacuum cleaner including the commutator motor element of the first invention.

  According to the commutator motor element of the present invention, the force of the commutator piece held by the resin molded body is improved. Therefore, if the commutator of this invention is used, the reliability of the commutator motor rotated at high speed rotation will improve.

  Due to the above effects, the commutator motor element can be rotated at a high speed and have a long service life, which has great industrial value.

The fragmentary sectional view which shows the structure of an electric blower provided with the commutator electric motor element of Example 1 of this invention. Sectional drawing of the location shown by AA in FIG. 1 of Example 1 of this invention The side view which shows the principal part of the commutator motor element of Example 1 of this invention Sectional drawing which shows the outline | summary of the commutator motor element in Example 2 of this invention (A) A sectional view in the direction along the axis of the commutator shown in Embodiment 1; (b) A vertical piece (fin) of the sectional view in the direction perpendicular to the axis of the commutator shown in Embodiment 1; Schematic diagram showing (A) Schematic diagram showing arc-shaped standing piece (fin), (b) Schematic diagram showing standing piece (fin) having a plurality of wavy arc shapes, (c) Bending-shaped standing piece (fin) ), (D) Schematic diagram showing a standing piece (fin) having a plurality of wavy bent shapes (A) Schematic diagram showing outline of manufacturing process 1 of standing piece (fin), (b) Schematic drawing showing outline of manufacturing process 2 of standing piece (fin), (c) of standing piece (fin) Schematic diagram showing the outline of manufacturing process 3 Sectional drawing of the direction along the axial center which shows the outline | summary of the commutator shown in Embodiment 2 The schematic diagram which shows the shape of the standing piece part (fin) of the commutator shown in Embodiment 3 (A) Half sectional view in the rotation axis direction showing an example of a conventional commutator, (b) Cross sectional view of a plane perpendicular to the rotation axis direction showing an example of a conventional commutator.

  Hereinafter, the present invention will be described with reference to the drawings. In this embodiment, as an example, an electric blower using the commutator motor element provided in the vacuum cleaner and a commutator motor including a permanent magnet in the field part will be described as examples. In addition, this invention is not limited by the following each Example and each aspect.

  FIG. 1 is a partial cross-sectional view illustrating a configuration of an electric blower 10 including a commutator motor element 11 according to the present embodiment. In the following description, an AC power supply is normally used as the power supply for the electric blower 10.

  The electric blower 10 has a configuration in which the commutator motor element 11 of the present embodiment is provided in a substantially cup-shaped bracket 12 having one opened. As shown in FIG. 1, the commutator motor element 11 includes a stator 30 that is a field, a rotor 40 that is an armature, and a brush portion 20.

The stator 30 forms a field winding 32 by winding an insulated wire or the like around a field core 31 made of a laminated body of electromagnetic steel sheets. The field core 31 is formed by, for example, laminating a plurality of electromagnetic steel plates having a predetermined shape. Further, the field core 31 has a magnetic pole portion 31 a serving as a magnetic pole on the inner side and a space portion for disposing the rotor 40. Such a stator 30 is fixed inside the bracket 12.

  On the other hand, the rotor 40 includes an armature core 41, an armature winding 42 formed of an armature winding body group in which an insulated wire is wound 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 part of the armature winding 42 drawn from the armature core 41 is connected to the commutator 45. The armature core 41 and the commutator 45 have a cylindrical shape, and the rotary shaft 43 is coupled so as to pass through the centers of the armature core 41 and the commutator 45. Both ends of the rotating shaft 43 are rotatably supported by bearings 13 respectively. The rotor 40 thus configured is disposed on the inner peripheral side of the stator 30 in a state where the armature core 41 and the magnetic pole portion 31a formed on the field core 31 face each other.

  A brush holder 25 included in the brush unit 20 is fixed to the bracket 12. The brush unit 20 includes the brush holder 25, the brush 21, and the brush spring 27. The brush 21 has a composition containing a solid lubricant in a carbon brush material such as artificial graphite. Such a brush 21 is held in the brush holder 25 and pressed against the commutator 45 by the brush spring 27. The commutator motor element 11 has a pair of such brush portions 20, and the pair of brushes 21 abut against the commutator 45. The commutator motor element 11 is configured as described above.

  In the electric blower 10, a fan case 15 is attached so as to cover the opened side of the bracket 12. The rotating shaft 43 of the rotor 40 extends from the opening of the bracket 12 into the fan case 15, and the centrifugal fan 16 is attached to the tip of the rotating shaft 43. Further, an air guide 17 is attached between the centrifugal fan 16 and the opening of the bracket 12. Thus, 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 element 11, an armature current flows to the armature winding 42 via the brush 21 and the commutator 45, and the stator A field current flows through the 30 field windings 32. A force is generated between the magnetic flux generated in the field core 31 by the field current and the armature current flowing through the armature winding 42, and the rotor 40 rotates. As the rotor 40 rotates, the centrifugal fan 16 rotates. By this rotation, air is sucked from the intake port 18 and flows into the centrifugal fan 16 and is discharged out of the electric blower 10 through the bracket 12.

  Next, a more detailed configuration of the commutator motor element 11 will be described.

  2 is a cross-sectional view taken along the line AA in FIG. That is, the main structures of the commutator 45 and the brush unit 20 viewed from the extending direction of the rotating shaft 43 are shown.

  As shown in FIG. 2, the commutator 45 has a plurality of commutator pieces 45a formed at equal intervals around the commutator 45. Each commutator piece 45 a is made of metal and supplies the current of the armature winding 42 by contacting the brush 21.

  In the pair of brush portions 20, the brush holder 25 is disposed to face the commutator 45 along a radial direction orthogonal to the rotation shaft 43. Further, the brush holder 25 has a cylindrical shape and has an opening 29 at a position facing the commutator 45. In the brush holder 25, the brush 21 and the brush spring 27 are disposed.

The brush spring 27 is a spiral spring. One end of the brush spring 27 is the brush 21.
The other end is brought into contact with the wall surface on the outer peripheral side of the brush holder 25. The brush spring 27 is disposed in the brush holder 25 so as to press the brush 21 against the commutator 45 through the opening 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 electrically connecting the brush 21 and the commutator piece 45 a formed on the commutator 45. .

  In this way, the brush 21 moves in the radial direction by the brush spring 27 in the brush holder 25 and slides in contact with the commutator 45. The brush 21 is connected to a connection line (pigtail) 28 for supplying a current to the brush 21. The connection line (pigtail) 28 passes through the spiral inside of the brush spring 27, one end is joined to the anti-contact surface of the brush 21, and the other end is welded to the wall surface on the outer periphery side of the brush holder 25.

  FIG. 3 is a side view showing a main part of the commutator motor element 11 in the present embodiment.

  As shown in FIG. 3, the armature core 41 and the commutator 45 are joined to the rotating shaft 43 by a method such as press fitting or shrinking. The armature core 41 includes an armature winding 42 that is a wound body of insulated wires. The wound armature winding 42 is partially drawn out to the commutator 45 side as a plurality of connecting wires 42a. On the other hand, a bent winding fastening portion (hook portion) 45b is formed at the end of each commutator piece 45a on the armature core 41 side. Each of the connecting wires 42a is joined to the winding fastening portion (hook portion) 45b, and thereby, the brush 21 is electrically connected to the armature winding 42 via the commutator piece 45a. Moreover, the slit 47 is arrange | positioned between the adjacent commutator pieces 45a, and the adjacent commutator pieces 45a are insulated.

  In addition, although it is the detailed structure of the connecting wire 42a, the winding start side connecting wire which is wiring of the winding start part of each armature winding body, and the winding end which is wiring of the winding end part of each armature winding body It consists of two types of crossover lines.

  The armature core 41 and the commutator 45 are press-fitted into the rotating shaft 43. The armature core 41 and the commutator 45 are joined to the rotating shaft 43 by a method such as shrinking. The armature winding 42 is wound around the armature core 41. The armature winding 42 is wound around the armature core 41, and the portion that protrudes from the armature core 41 along the axial center direction of the rotation shaft 43 becomes the coil end 35.

  The armature core 41 includes a plurality of tooth portions 44 and a slot 46 between the adjacent tooth portions 44. The armature 41a in the present embodiment has twelve slots 46 because it has twelve armature cores 41. The armature winding 42 composed of the armature winding body group is wound by so-called distributed winding. The commutator 45 includes 24 commutator pieces 45a. Each commutator piece 45a includes a winding fastening portion (hook portion) 45b. The terminal of the crossover 42a is connected to the winding fastening part (hook part) 45b.

  The insulated wire that forms the armature winding 42 has a winding start portion and a winding end portion as a crossover. The crossover wire is joined to a winding fastening portion (hook portion) 45 b of the commutator 45. Between the coil end 35 and the commutator 45, there is an assembly of connecting wires that connect between the armature winding 42 and the winding fastening portion (hook portion) 45 b of the commutator 45. This assembly of crossover wires is used to wire the armature winding 42 wound in an overly dense manner. Hereinafter, the aggregate of the crossover lines is referred to as a crossover group 42b.

  FIG. 4 is a cross-sectional view illustrating an outline of the commutator motor 1100 according to the second embodiment.

As shown in FIG. 4, the commutator according to the second embodiment of the present invention is used inside a commutator motor 1100. In the following description, a DC power source is used as a power source for the commutator motor 1100.

  The commutator motor 1100 includes a rotor 1120, a permanent magnet 1140, a frame 1150, a brush 1160, and a commutator 1100a. As shown in FIG. 4, in the commutator motor 1100, a permanent magnet 1140 is attached along the inner peripheral surface of a cylindrical frame 1150, and the rotor 1120 is positioned on the inner peripheral side of the permanent magnet 1140. To do.

  The rotor 1120 includes a commutator 1100a, a rotating shaft 1110, and an armature 1130.

  The commutator will be described in detail later.

  The armature 1130 has an armature core 1122, an insulator 1123, and an armature winding 1124. In the second embodiment, the armature core 1122 is configured by stacking steel plates. The armature core 1122 can be formed in another configuration as long as the same effect as that of the stacked steel plates can be obtained. An armature winding 1124 is wound around the armature core 1122 via an insulator 1123. The insulator 1123 electrically insulates the armature core 1122 and the armature winding 1124 from each other. The insulator 1123 is formed of resin.

  An armature 1130 and a commutator 1100a are attached to the rotating shaft 1110. The central axis of the rotating shaft 1110 is the same position as the axis of the commutator 1100a. The rotation shaft 1110 is rotatable around the center axis as a rotation center.

  A plurality of commutator pieces are formed on the commutator 1100a. As shown in FIG. 4, in the second embodiment, the commutator is constituted by a plurality of commutator pieces and is in contact with a pair of brushes 1160. The pair of brushes 1160 are in contact with a plurality of commutator pieces from a direction orthogonal to the axis. The direction orthogonal to the axis is also referred to as a radial direction. A surface on which each of the plurality of commutator pieces and each of the pair of brushes 1160 slide is also referred to as a sliding surface. Each of the pair of brushes 1160 uses a carbon material.

  A driving current is supplied to each of the plurality of commutator pieces from each of the pair of brushes 1160 via the sliding surface. The direction in which the drive current flows is switched depending on the positional relationship between the commutator piece and the brush 1160. Since the direction in which the drive current flows is switched in the magnetic field applied by the permanent magnet 1140, the armature 1130 rotates. Switching the direction in which the drive current flows is also referred to as commutation.

  In Example 1 and Example 2, a commutator described later is mounted.

Embodiment 1
In FIG. 5, the outline | summary of the commutator in Example 1 and Example 2 is shown. FIG. 5A shows a cross-sectional view in the direction along the axis 220. FIG. 5B shows a cross-sectional view perpendicular to the axis 220. The commutator 210 includes a commutator piece 230 and a resin molded body 240.

  In the commutator shown in FIG. 5, a plurality of commutator pieces 230 extending along the axial center are located at predetermined intervals over the circumferential direction surrounding the axial center 220, and each of them is a resin molded body. 240. The resin molding 240 is made of an insulating resin. For example, a thermosetting resin such as an epoxy resin or a phenol resin is employed.

  In the commutator 210, the slit portion 250 is located between each of the adjacent commutator pieces 230. In addition, as long as insulation between the commutator pieces 230 is obtained, the slit portion 250 is not necessarily required, and a structure in which the resin constituting the resin molded body 240 is located between the commutator pieces 230 may be used.

  The commutator piece 230 includes a standing piece portion (fin) 231 and a winding fastening portion (hook portion) 232.

  The standing piece (fin) 231 fixes the commutator piece 230 and the resin molded body 240 to each other. Details will be described later.

  The winding fastening portion (hook portion) 232 is used to electrically connect the commutator piece 230 and the armature winding. The armature winding is entangled with the winding fastening portion (hook portion) 232 and is crushed while a current is applied, thereby forming an electrical connection. If an electrical connection between the commutator piece 230 and the armature winding can be obtained, various means such as a method using a slit and a method using solder can be substituted.

  The standing piece (fin) 231 in the present embodiment is convex in the direction toward the axis 220, and the central portion in the direction toward the axis 220 in the cross section perpendicular to the axis 220 (FIG. 5B). However, with respect to a straight line connecting the end portion in the direction toward the axis 220 and the end portion in the direction away from the axis 220, the projection is convex in one of the circumferential directions surrounding the axis 220. For example, in FIG.5 (b), the standing piece part (fin) 231 has a circular arc shape.

  According to the configuration of this embodiment, even if there is one standing piece (fin) 231, the holding force by the resin molded body 240 is obtained not only in one specific direction but also in a plurality of directions. .

  For example, in the case of a flat plate-like piece (fin), the bonding force between the commutator piece 230 and the resin molded body 240 is improved unless a plurality of stand pieces (fins) facing each other are formed. I can't figure it out. On the other hand, according to the configuration of the present embodiment, even when a plurality of standing piece portions (fins) 231 are aligned in the same direction, the shape of the standing piece portions (fins) 231 has a curved surface in an arc shape. The joining force between the child piece 230 and the resin molded body 240 can be improved.

  The configuration in which the central portion of the upright piece (fin) 231 is convex toward the opposite side of the direction in which the commutator motor 1100 rotates increases the bonding force between the commutator piece 230 and the resin molded body 240. This is a particularly preferred embodiment. That is, the frictional force generated by the friction between the brush 1160 and the commutator piece 230 faces the end portion (the root of the standing piece portion (fin) 231) in the direction away from the axis 220 of the standing piece portion (fin) 231. . Therefore, the frictional force can be efficiently received by the standing piece (fin) 231 and the durability of the commutator 210 is improved.

  In particular, FIG. 6 shows various shapes of the standing piece (fin) 231 that exhibits a remarkable effect.

  In FIG. 6A, as illustrated in FIG. 5B, the cross-sectional shape perpendicular to the axis is an arc shape.

  Moreover, as shown in FIG.6 (b), the standing piece part (fin) 231 contains several circular arc shape in the cross section perpendicular | vertical to an axial center. That is, it includes a configuration in which the cross-sectional shape of each of the plurality of standing piece portions (fins) in a plane perpendicular to the longitudinal direction of the rotating shaft is wavy. Specifically, the cross-sectional shape of each of the plurality of standing piece portions (fins) on a plane perpendicular to the longitudinal direction of the rotation axis is wavy, and the wavy crest shape includes a curved shape.

  Moreover, as shown in FIG.6 (c), as for the standing piece part (fin) 231, the cross-sectional shape of the orthogonal | vertical direction is V-shaped with respect to an axial center. That is, the cross-sectional shape of each of the plurality of standing piece portions (fins) on a plane perpendicular to the longitudinal direction of the rotation shaft includes a bent shape.

  Moreover, as shown in FIG.6 (d), the standing piece part (fin) 231 contains several V shape in the cross section perpendicular | vertical to an axial center. Specifically, the cross-sectional shape of each of the plurality of standing piece portions (fins) on a plane perpendicular to the longitudinal direction of the rotation shaft is wavy, and the wavy crest portion includes a bent shape.

  The manufacturing method of the standing piece part (fin) 231 which concerns on this invention is demonstrated using FIG. FIG. 7 shows a procedure for newly forming upright pieces (fins) 231 whose cross-sectional shape perpendicular to the axis is arcuate. For the manufacture of the upright pieces (fins) 231, a metal plate 2200 that is a raw material and a processing blade 2210 are used. The metal plate 2200 is a raw material plate constituting the commutator piece 230. Generally, copper or copper alloy is used. The processing blade 2210 is a tool for processing the metal plate 2200 to form the upright pieces (fins) 231. A cemented carbide such as tungsten carbide can be used. In order to form an arcuate upright piece portion (fin) 231, the cutting edge is processed into an arc shape.

  As shown in FIG. 7A, first, the processing blade 2210 is pushed into the surface of the metal plate 2200 in an oblique direction with respect to the metal plate 2200.

  As shown in FIG. 7B, when the machining blade 2210 is pushed in as it is, a part of the metal plate 2200 is cut out in an arc shape along the arcuate cutting edge of the machining blade 2210.

  After pushing the processing blade 2210 to a predetermined depth, as shown in FIG. 7C, the cutting blade 2210 is raised in the opposite direction to the metal plate 2200, so that a part of the cut out metal plate 2200 is obtained. It is raised and becomes a new upright piece (fin) 231.

  By repeating this operation, a plurality of standing piece portions (fins) 231 can be formed in the same direction.

  The commutator 210 can be manufactured from the metal plate 2200 on which the plurality of standing pieces (fins) 231 are formed by using a general commutator manufacturing method.

  By using the above manufacturing method, it is possible to form the standing piece (fin) 231 without wasting any metal plate 2200 which is a base material of the commutator piece 230, and to suppress the raw material cost. It is possible.

(Embodiment 2)
FIG. 8 is a cross-sectional view in the direction along the axis showing the outline of the commutator 211 in the present embodiment.

  In addition, about the structure similar to the commutator 210 in the present Example 2, the same code | symbol is attached | subjected and description is used.

  As shown in FIG. 8, the standing piece (fin) 231 of the commutator 211 in the present embodiment is separated to divide the standing piece (fin) 231 into two or more groups in the cross section in the direction along the axis. Part 233.

By adopting the configuration shown in this embodiment, the upright pieces (fins) 231 can improve the holding force with the resin molded body 240 in the direction along the axis 220.

  Further, when the resin molded body 240 is manufactured by various resin molding methods such as transfer molding and injection molding, the separation portion 233 functions as a flow path for efficiently filling the resin. Therefore, it is possible to suppress defects in resin molding and reduce variations in the manufacturing process.

(Embodiment 3)
FIG. 9 is a schematic diagram showing the shape of the standing piece (fin) 231 in the present embodiment.

  In addition, about the structure similar to the commutator 210 in the present Example 2, the same code | symbol is attached | subjected and description is used.

  As shown in FIG. 9, the standing piece (fin) 231 in the present embodiment has a thickness of a portion located at an end in a direction toward the axis 220 in a cross section perpendicular to the axis 220. The structure is thinner than the thickness of the portion located at the end in the direction away from 220.

  By adopting the configuration shown in the present embodiment, when the commutator 210 rotates, the thickness of the end portion in the direction away from the axis 220 where the centrifugal force becomes the largest in the standing piece portion (fin) 231 is increased, Stress due to centrifugal force is relieved. Therefore, the durability of the commutator 212 is improved.

  Further, the vertical piece portions (fins) 231 according to the present embodiment are positioned at the end portions in the direction in which the adjacent vertical piece portions (fins) 231 are separated from the axial center 220 in the cross section perpendicular to the axial center 220. The portion located at the end portion in the direction toward the axial center 220 is wider than the portion to be formed.

  With the configuration shown in this embodiment, when the resin molded body 240 is manufactured by various resin molding techniques such as transfer molding and injection molding, an entrance for the resin to enter between the standing piece portions (fins) 231 is provided. spread. Therefore, resin molding becomes easy and variations in the manufacturing process are suppressed.

  As described above, according to the present invention, the commutator including the resin molded body can achieve both high-speed rotation and long life, and is useful for the commutator motor element and various electric devices using the commutator motor element. Yes, it has great industrial value.

DESCRIPTION OF SYMBOLS 10 Electric blower 11 Commutator motor element 12 Bracket 13 Bearing 15 Fan case 16 Centrifugal fan 17 Air guide 18 Air inlet 20 Brush part 21 Brush 25 Brush holder 27 Brush spring 28 Connection line (pigtail)
DESCRIPTION OF SYMBOLS 29 Opening part 30 Stator 31 Field core 31a Magnetic pole part 32 Field winding 35 Coil end 40 Rotor 41 Armature core 41a Armature 42 Armature winding 42a Junction wire 42b Junction wire group 43 Rotating shaft 44 Teeth part 45 Commutator 45a Commutator piece 45b Winding fastening part (hook part)
46 slot 47 slit 48 connection point 49 embedded portion of commutator piece having a π-shaped outer shape 50 resin molded body 53 cylindrical body made of ceramic material 210 commutator 211 commutator 212 commutator 220 shaft center 230 commutator piece 231 standing piece part (fin)
232 Winding fastening part (hook part)
233 Separating part 240 Resin molding 250 Slit part 1100 Commutator motor 1100a Commutator 1110 Rotating shaft 1120 Rotor 1122 Armature core 1123 Insulator 1124 Armature winding 1130 Armature 1140 Permanent magnet 1150 Frame 1160 Brush 2200 Metal plate 2210 For processing blade

Claims (14)

A field molded portion, a plurality of commutator pieces having a plurality of standing pieces on a non-sliding surface, and a resin molded body that is in close contact with the non-sliding surfaces and the plurality of standing pieces of each of the plurality of commutator pieces. A commutator including
A rotating shaft for locking the commutator;
An armature core fixed to the rotating shaft;
An armature including an armature winding composed of a wound body group of insulated wires in the armature core; and
A winding start side crossover wire that is a wiring of a winding start portion of each winding body of the winding body group;
A winding end side connecting wire that is a wiring of a winding end portion of each wound body of the wound body group;
The winding start side crossover wire electrically connected to the commutator piece of the commutator, which is located in the longitudinal direction of the rotating shaft and spaced from the armature core along the longitudinal direction of the rotating shaft; An armature structure including the winding end side crossover wire;
A brush that contacts and slides with the commutator, and a commutator motor element,
Each of the plurality of standing piece portions constitutes a standing piece group in a row arrangement parallel to each other, and the direction of the row of the standing piece group and the longitudinal direction of the rotation shaft are the same direction,
Furthermore,
The intermediate portion located between the base portion of each of the plurality of standing piece portions and the tip portion of each of the plurality of standing piece portions has a position of each base portion of the plurality of standing piece portions and the plurality of standing pieces. A commutator motor element including a configuration that protrudes in a reverse direction side with respect to a rotation direction of the rotation shaft with respect to a position of each tip portion of the part. The commutator motor element of claim 1,
The intermediate portion located between each base portion of the plurality of standing piece portions and each tip end portion of the plurality of standing piece portions includes a position of each base portion of the plurality of standing piece portions and the plurality of standing portions. Instead of the configuration of projecting toward the reverse direction side with respect to the rotational direction of the rotary shaft rather than the position of each tip part of the one part,
The intermediate portion located between each base portion of the plurality of standing piece portions and each tip end portion of the plurality of standing piece portions includes a position of each base portion of the plurality of standing piece portions and the plurality of standing portions. A commutator motor element including a configuration that protrudes to a side in the same direction as the rotation direction of the rotary shaft from the position of each tip portion of the piece portion. 2. The commutator motor element according to claim 1, wherein the commutator motor element includes a configuration in which a cross-sectional shape of each of the plurality of standing pieces in a plane perpendicular to a longitudinal direction of the rotating shaft is an arc shape or a bent shape. . The commutator motor element according to claim 1, wherein the commutator motor element includes a configuration in which a cross-sectional shape of each of the plurality of standing piece portions in a plane perpendicular to the longitudinal direction of the rotation shaft is a wave shape. 2. The commutator motor element according to claim 1, wherein a cross-sectional shape of each of the plurality of standing pieces in a plane perpendicular to a longitudinal direction of the rotation shaft is a wave shape, and a shape of the wave-like wave crest portion is a curve. A commutator motor element including at least a shape. 2. The commutator motor element according to claim 1, wherein a cross-sectional shape of each of the plurality of standing pieces in a plane perpendicular to a longitudinal direction of the rotation shaft is wavy, and the wavy wave crest is bent in shape. A commutator motor element including at least a shape. 2. The commutator motor element according to claim 1, wherein each of the plurality of standing pieces constitutes a standing piece group having a parallel arrangement with each other, and the direction of the row of the standing piece groups and the rotation shaft. A commutator electric motor element including a configuration in which a longitudinal direction is the same direction, further including a plurality of the standing piece group, each of the standing piece groups being separated from each other in the longitudinal direction of the rotating shaft. The commutator motor element according to claim 1, wherein the commutator motor includes a configuration in which a thickness dimension of each of the plurality of standing piece parts is larger than a thickness dimension of each of the plurality of standing piece parts. element. The commutator motor element according to claim 1, wherein the commutator motor includes a configuration in which a thickness dimension of each of the plurality of standing piece portions is smaller than a thickness dimension of each of the plurality of standing piece portions. element. 2. The commutator motor element according to claim 1, wherein a thickness dimension of a base part of each of the plurality of standing piece parts and a thickness dimension of each tip part of the plurality of standing piece parts are substantially equal to each other. Including commutator motor elements. The commutator motor including the commutator motor element according to claim 1, wherein the field magnet portion includes a field core and a pair of field windings formed by winding an insulated wire around the field core. Child electric motor. The commutator motor including the commutator motor element according to claim 1, wherein the field magnet portion includes a permanent magnet. An electric blower comprising the commutator motor element according to claim 1. A vacuum cleaner comprising the commutator motor element of claim 1.

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