JP3384078B2 - Commutator motor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a commutator motor.

[0002]

2. Description of the Related Art A commutator motor utilizes the frequency conversion function of a commutator, and this type of motor is widely used in household appliances such as vacuum cleaners.

A conventional commutator motor will be described below. FIG. 8 is a schematic configuration diagram of a conventional commutator motor, and FIG. 9 is a sectional view of a stator of the conventional commutator motor. 8 and 9, the rotating shaft 2 of the rotor 1 of the commutator motor
A commutator 3 having a frequency converting action is attached to the, and one end of a winding wire 4 wound around the rotor 1 is connected to the commutator 3. Stator core 6 on the stator 5 side
A field winding 8 covered with an insulating tape 7 and bundled is attached to one end of the field winding 8, and one end of the field winding 8 is connected to a brush 11 incorporated in a brush case 10 via a lead wire 9. .

When the commutator motor configured as described above is energized, the field winding 8 → lead wire 9 → brush 11 → commutator 3 → winding 4 → commutator 3 → brush 11 → lead wire 9 → field A current flows through the path of the magnetic winding 8 to rotate the rotor 1.

[0005]

However, in the structure of the conventional commutator motor as described above, the field winding 8 covered with the insulating tape 7 and bundled is fixed to the stator core 6 and fixed. After the brush case 10 is attached to the child 5 side, the field winding 8 and the brush 11 of the brush case 10 must be connected again by the lead wire 9, which increases the number of assembly steps on the stator 5 side. Had a point.

An object of the present invention is to solve the above problems and provide a commutator motor in which the number of assembling steps is reduced.

[0007]

In order to solve the above problems, a commutator motor according to the present invention has a rotor having a commutator attached to a rotating shaft, a coil bobbin wound with field windings, and a fixed fixing bobbin. A stator configured of a child iron core, the coil bobbin includes at least one coil bobbin integrally provided with a brush case,
The stator core has a technical means of being composed of an inner core for mounting the coil bobbin and an outer core for mounting the inner core.

The coil bobbin is preferably a coil bobbin integrally provided with a brush case for one pole. It is desirable that one of the coil bobbins integrally provided with the brush case be provided with brush cases for two poles. It is appropriate that the coil bobbin and the brush case are all integrated.

[0009]

Since the commutator motor of the present invention is provided with at least one coil bobbin integrally provided with the brush case, it is not necessary to cover the field winding with the insulating tape.
Since the work of attaching the brush case to the stator side can be omitted, the number of assembly steps can be reduced. Since each is a coil bobbin with one pole brush case,
Since the same coil bobbin can be used, manufacturing is facilitated. Since one of the coil bobbins is provided with brush cases for two poles, the assembling accuracy can be improved. Since the coil bobbin and the brush case are all integrated, it is the easiest to assemble.

[0010]

Embodiments of the present invention will now be described with reference to the drawings, in which the same rotor parts as in the conventional example are designated by the same reference numerals.

(First Embodiment) FIG. 1 is a front view of a commutator motor according to a first embodiment of the present invention, and FIG. 2 is a side view of a stator of a commutator motor according to the first embodiment of the present invention. Is.

In FIG. 1 and FIG. 2, a commutator 3 having a frequency converting action is attached to a rotary shaft 2 of a rotor 1 of a commutator motor, and the commutator 3 is wound around the rotor 1. One end of a winding 4 (not shown) is connected. The stator core 13 on the side of the stator 12 is composed of an inner core 14 and an outer core 15, and by attaching the inner core 14 to the outer core 15, the two can be integrated. A pair of separately configured coil bobbins 16 are attached to the inner iron core 14, and one end of the coil bobbin 16 is integrally provided with a brush case 17 for one pole. The field winding 18 wound around the coil bobbin 16 is electrically connected to the terminal terminal 19 of the brush case 17, and the terminal terminal 19 is connected via the pigtail 20.
By connecting the terminal portion 22 of the brush case 17 in which the brush 21 is incorporated to the field winding 18 and the brush 21.
And are conducting.

When the commutator motor configured as described above is energized, the field winding 18 → the pigtail 20 → the brush 21.
-> Commutator 3-> winding 4-> commutator 3-> brush 21-> pigtail 20-> field winding 18 A current flows through the path to rotate the rotor 1.

Hereinafter, FIG. 3 is an exploded view of the coil bobbin of the commutator motor according to the first embodiment of the present invention, FIG. 4 is an assembly view of the coil bobbin of the commutator motor according to the first embodiment of the present invention, and FIG. The coil bobbin 16 and the stator core 13 which are the core parts of the present invention will be described in detail with reference to the exploded view of the stator core of the commutator motor in the first embodiment of the present invention.

In FIG. 3, the coil bobbins 16 are constructed separately, and the upper and lower coil bobbins 16 are in point symmetry. In order to reduce the number of steps at the time of assembly, a brush 21 is installed in advance at one end of the coil bobbin 16.
The extreme brush case 17 is attached integrally,
The field winding 18 is also wound around the coil bobbin 16 at a predetermined position without being bound by the insulating tape 7. By directly winding the field winding 18 around the coil bobbin 16, it is possible to reduce the step of covering and bundling with the insulating tape 7 of the conventional example. If the upper and lower coil bobbins 16 are attached to the inner core 14, the coil bobbins 16 are integrated as shown in FIG. As shown in FIG. 5, the stator core 13 has an inner core 14 and an outer core 1
5 is integrated with the coil bobbin 16 by dividing the stator core 13 into two parts.
Installation work is easy.

In order to omit redundant description, other embodiments will be described below by limiting to the coil bobbin 16 and the stator core 13 which are the core parts of the present invention.

(Second Embodiment) FIG. 6 is an exploded view of a coil bobbin of a commutator motor according to a second embodiment of the present invention.
The difference from the coil bobbin 16 of the first embodiment is that the brush cases 26 for two poles are provided on one of the coil bobbins 23 and 24.

In FIG. 6, the coil bobbins 23 and 24 are constructed separately, and in order to reduce the number of steps at the time of assembly, a brush case 26 in which brushes 25 are incorporated is previously attached to both ends of the coil bobbin 23 for two poles. Has been. The field winding 18 is also wound around the coil bobbins 23 and 24 at predetermined positions without being bound by the insulating tape 7. By directly winding the field winding 18 around the coil bobbins 23, 24, it is possible to reduce the step of covering and bundling with the insulating tape 7 of the conventional example. The coil bobbins 23, 24 are attached to the stator iron core 13 by first attaching the inner bobbin 14 to the outer iron core 15 as in the case of the first embodiment described with reference to FIG.
Attach to and integrate. By thus dividing the stator core 13 in two, the work of attaching the coil bobbins 23, 24 is facilitated.

In the case of the second embodiment of the present invention, the field winding 18 on the coil bobbin 23 side can be electrically connected to the terminal terminal 27 of the left brush case 26 before assembly, but the field on the coil bobbin 24 side can be connected. The magnetic winding 18 is electrically connected to the terminal terminal 27 of the coil bobbin 24 after assembly.

(Embodiment 3) FIG. 7 is a front view of a coil bobbin of a commutator motor according to a third embodiment of the present invention.
The difference from the coil bobbin 16 of the first embodiment is that the two coil bobbins 28 are not divided into two and are integrated from the beginning.

In FIG. 7, the coil bobbin 28 around which the field winding 18 is wound is constructed in a state in which two poles are integrated, and in order to reduce the number of steps at the time of assembly, the coil bobbin 28 is previously provided on the left and right sides of the coil bobbin 28. A brush case 30 incorporating 29 is integrally attached. The field winding 18 is also wound around the coil bobbin 28 at a predetermined position without being bound by the insulating tape 7.
The upper field winding 18 is electrically connected to the terminal terminal 31 of the left brush case 30, and the lower field winding 18 is electrically connected to the terminal terminal 31 of the right brush case 30.
By directly winding the field winding 18 around the coil bobbin 28, it is possible to reduce the step of covering and bundling with the insulating tape 7 of the conventional example. The coil bobbin 28 is attached to the stator core 13 by first attaching it to the inner core 14 and then to the inner core 1 as in the case of the first embodiment described with reference to FIG.
4 is attached to the outer core 15 and integrated. By thus dividing the stator core 13 in two, the work of attaching the coil bobbin 28 is facilitated.

[0022]

A commutator motor according to the present invention comprises a rotor having a commutator attached to a rotary shaft, and a stator composed of a coil bobbin around which a field winding is wound and a stator core to which the coil bobbin is attached. This coil bobbin is provided with at least one coil bobbin integrally provided with a brush case, and since the stator core is composed of an inner core to which the coil bobbin is attached and an outer core to which the inner core is attached, a field winding is adopted. Since it is not necessary to cover the wires with insulating tape and the work of attaching the brush case to the stator side can be omitted, the number of assembly steps can be reduced.
Further, the manufacturing can be facilitated. Moreover, the assembling accuracy can be improved.

[Brief description of drawings]

FIG. 1 is a front view of a commutator motor according to a first embodiment of the present invention.

FIG. 2 is a side view of the stator of the commutator motor according to the first embodiment of the present invention.

FIG. 3 is an exploded view of a coil bobbin of the commutator motor according to the first embodiment of the present invention.

FIG. 4 is an assembly diagram of a coil bobbin of the commutator motor according to the first embodiment of the present invention.

FIG. 5 is an exploded view of a stator core of a commutator motor according to the first embodiment of the present invention.

FIG. 6 is an exploded view of a coil bobbin of a commutator motor according to a second embodiment of the present invention.

FIG. 7 is a front view of a coil bobbin of a commutator motor according to a third embodiment of the present invention.

FIG. 8 is a schematic configuration diagram of a conventional commutator motor.

FIG. 9 is a sectional view of a stator of a conventional commutator motor.

[Explanation of symbols]

1 rotor 2 rotation axes 3 commutator 4 windings 5, 12 Stator 6, 13 Stator core 7 insulating tape 8,18 Field winding 9 lead wire 10, 17, 26, 30 Brush case 11, 21, 25, 29 brushes 14 Inner iron core 15 External iron core 16, 23, 24, 28 coil bobbins 19, 27, 31 Terminal terminals 20 pigtails 22 Terminal

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Claims (4)

(57) [Claims] 1. A rotor having a commutator attached to a rotary shaft, a stator composed of a coil bobbin around which a field winding is wound and a stator core to which the coil bobbin is attached, and the coil bobbin integrally includes a brush case. A commutator motor comprising at least one coil bobbin provided, wherein the stator core comprises an inner core to which the coil bobbin is attached and an outer core to which the inner core is attached. 2. The commutator motor according to claim 1, wherein each of the coil bobbins is a coil bobbin integrally provided with a brush case for one pole. 3. The commutator motor according to claim 1, wherein one of the coil bobbins integrally provided with the brush case is provided with a brush case for two poles. 4. The commutator motor according to claim 1, wherein the coil bobbin and the brush case are all integrated.