JPH1042534A - Commutator motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the cooling effect and to prevent a temperature rise caused by the increase in power consumption by providing guiding elements for guiding winds towards a commutator on a terminal block. SOLUTION: When the main switch of a vacuum cleaner is turned on, a rotor R rotates by a current flowing in each coil 24, 26. By the ventilating force of an electric blower generated by the rotation of this rotor R, it is possible to obtain suction as a vacuum cleaner. Along with it, a portion of the wind passes through the electric blower. When a portion of this wind passes through from the lower part to the upper part, along the axial direction of its shaft 25, at this time, it is efficiently guided to the rotor coil 26, commutator 28, and carbon brushes by the shape of standing walls 22g. Consequently, it is possible to sufficiently secure a cooling effect caused by the increase in power consumption and to prevent the temperature from rising.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a terminal block mounted on a stator core, a stator coil wound over the stator core and the terminal block, and a rotating shaft penetrating the stator core. A rotor iron core fixed to an intermediate portion of the shaft and wound with a rotor coil, and a commutator fixed to one end of the rotary shaft on the side where the terminal block is provided,
The present invention relates to a commutator motor including a pair of carbon brushes elastically contacting the commutator.

[0002]

2. Description of the Related Art Conventionally, for example, as shown in FIGS. 9 and 10, a motor using a so-called two-pole commutator motor 3 is known as an electric blower 2 of a vacuum cleaner 1 shown in FIG. I have.

[0003] One end 4a of the rotating shaft 4 of the commutator motor 3
Is supported by a frame 2a of the electric blower 2 via a bearing 5,
The other end 4b of the rotating shaft 4 is supported by a bracket 6 fixed to the frame 2a via a bearing 7.

On the other hand, as shown in FIG. 7, a commutator motor 3 includes a terminal block 9 mounted on a stator core 8, stator coils 10, 10 wound over the stator core 8 and the terminal block 9, and A rotor core 12 fixed to a middle part of the rotating shaft 4 and wound with a rotor coil 11, a commutator 13 fixed to one end 4 a of the rotating shaft 4, a pair of carbon brushes 14 elastically contacting the commutator 13, 14 (shown in FIGS. 9 and 10)
And

The commutator motor 3 includes a stator core 8,
A stator A including a terminal block 9 and a stator coil 10, a rotating shaft 4, a rotor coil 11, and a rotor core 1;
2. An inner rotor type constituted by a rotor B constituted by a commutator 13 and stator coils 10 and 10
And the current flowing through the rotor coil 11 causes the rotor B to rotate.

As shown in FIG. 8, a terminal base 9 has a rectangular frame-shaped base 9a fixed to the stator core 8, and terminals 15, 1 to which one ends of the stator coils 10, 10 are connected.
Terminal mounting portions 9b, 9b to which 5 is mounted, and terminals 16 to which the other ends of the stator coils 10, 10 are connected and which are electrically connected to the carbon brushes 14, 14 (only one is shown in FIG. 10) Terminal mounting portions 9c, 9c on which
A coil holding piece 9d and a guide piece 9e for guiding one end of one of the stator coils 9 to the terminal mounting portion 9b;
In order to maintain the wound state of the stator coils 10 and 10 positioned on the side of
A pair of upright walls 9f vertically erected along the axial direction of
9f and tongue pieces 9g, 9g formed on the standing walls 9f, 9f.

[0007]

By the way, in the commutator motor 3 described above, the wind blows through the electric blower 2 by the blown wind of the electric blower 2 generated with the rotation of the rotor B. The rotor coil 11, the commutator 13, and the carbon brush 14 are cooled. However, since the standing walls 9f, 9f are erected vertically along the axial direction of the rotating shaft 4, power consumption increases. Therefore, there is a problem that the cooling effect becomes insufficient and the temperature rise cannot be prevented.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a commutator motor that can improve a cooling effect and can prevent a rise in temperature due to an increase in power consumption. .

[0009]

According to one aspect of the present invention, there is provided a terminal block mounted on a stator core, and a stator coil wound over the stator core and the terminal block. And a rotor core having a rotating shaft penetrating the stator core, fixed to an intermediate portion of the rotating shaft, and fixed to one end of the rotating shaft on the side where the terminal block is provided, and a rotor iron core wound with a rotor coil. In a commutator motor including a commutator and a pair of carbon brushes resiliently contacting the commutator, a gist is provided on the terminal block for guiding a wind toward the commutator.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a commutator motor according to the present invention will be described with reference to the drawings as applied to a two-pole commutator motor for an electric blower of a vacuum cleaner. The apparent installation position and configuration of the commutator motor of the present invention are shown in FIG.
11 is substantially the same as the conventional commutator motor 3 shown in FIG.

In FIG. 4, reference numeral 2 denotes a conventional electric blower. A so-called two-pole commutator motor 20 is provided in the electric blower 2.

The commutator motor 20, as shown in FIG.
Terminal block 22 mounted on one end face of stator core 21
A fixed base 23 mounted on the other end surface of the stator core 22, a pair of stator coils 24 wound around the bases 22, 23, and a rotating shaft 25 penetrating the stator core 21; A rotor core 27 fixed to an intermediate portion of the rotating shaft 25 and wound with a rotor coil 26; a commutator 28 fixed to one end 25a of the rotating shaft 25;
8 is provided with a pair of carbon brushes 29, 29 (shown only in FIG. 4) which are in elastic contact with the brush 8.

The commutator motor 20 includes a stator core 2
1, an inner rotor type comprising a stator S constituted by a terminal block 22, a stator coil 24, and a rotor R constituted by a rotating shaft 25, a rotor coil 26, a rotor core 27, and a commutator 28; 2
The rotor R is rotated by the current flowing through the coils 4 and 24 and the current flowing through the rotor coil 26.

As shown in FIGS. 2A and 2B, the terminal block 22 has a rectangular frame-shaped base 22a fixed to the stator core 21, and terminals 30 to which one ends of the stator coils 24 are connected. , 30 to which terminal mounting section 22 is mounted
b, 22b and the other end of each of the stator coils 24, 24 and a terminal mounting portion 22 to which terminals (not shown) electrically connected to the carbon brushes 29, 29 are mounted.
c, 22c, a coil holding piece 22d and a guide piece 22e, 22f for guiding one end of one of the stator coils 22 to the terminal mounting portion 22b, and a winding state of the stator coils 24, 24 located on the terminal block 22 side. Maintenance and rotor R
A pair of upright walls 22g, 22g as guide portions provided upright to prevent displacement to the side, tongue pieces 22h, 22h formed on the upright walls 22g, 22g, and stator coils 24, 22g.
1 to 2 sets of inclined ribs 2 formed at the winding contact portion of 24
2i, 22i... And positioning and fixing projections 22j, 22j projecting downward from the base 22a and engaging with the stator core 21.

The upright wall 22g has an arc shape both along the circumferential direction and the axial direction of the rotor coil 26, thereby covering a part thereof (upper part in FIG. 1) along the rotor coil 26. Further, the upright wall 22g is formed integrally with the terminal block 22 by an insulating resin, thereby ensuring insulation between the coils 24 and 26. Further, since the upright wall 22g covers a part thereof along the rotor coil 26, the standing wall 22g maintains the insulating state with respect to the rotor coil 26, so that the stator coil 2
6 can be wound neatly at a position as close as possible to the rotor R and so as to partially overlap, so that the stator S has a small diameter such that the rotor coil 26 does not protrude from the outer peripheral wall of the stator core 21. it can.

The inclined ribs 22i, 22i serve as reinforcing members for the base portion 22a in the folded portion of the stator coil 24. Further, as shown in FIG. 3, the inclined ribs 22i, 22i are inclined in such a direction that they become higher toward the center from the left and right in the figure, so that the diameter of the folded portion of the stator coil 24 is reduced and the outward spread is prevented. can do.

The fixed base 23 has a rectangular frame-shaped base 23a fixed to the stator core 21, a pair of standing walls 23b, 23b standing upright from the base 23a, and standing walls 23b, 2b.
3b, tongue pieces 23c, 23c, and inclined ribs 22
i, 22i are provided with the same inclined ribs (not shown).

The upright wall 23b is provided upright along the axial direction of the rotary shaft 25 and has an arc shape in the circumferential direction.
It also serves as a partition wall for maintaining the wound state of the stator coils 24, 24 located on the fixed base 23 side and preventing the displacement to the rotor R side and maintaining the insulated state between the coils 24, 26 like the standing wall 22g. . The upright wall 23b is provided upright along the axial direction of the rotating shaft 25, thereby facilitating the insertion of the rotor R when the rotor R is assembled to the stator S. Further, since the upright wall 23b is formed along the axial direction of the rotating shaft 25, the stator coil 26 is maintained in an insulated state with respect to the rotor coil 26. The stator S can be wound and has a small diameter without the rotor coil 26 protruding from the outer peripheral wall of the stator core 21.

In the above configuration, after the terminal block 22 and the fixed base 23 are mounted on the stator core 21,
The stator coil 24 is wound across the vertical walls 22g and 23b along the axial direction of the stator coil 24 to form the stator S. The rotor R is formed by fixing the rotor core 27 and the commutator 28 to the rotating shaft 25 and winding the rotor coil 26 around the rotor core 27.

At this time, since the standing walls 22g and 22g are formed so as to cover a part of the rotor coil 26, the insulation state with the rotor coil 26 can be ensured in spite of the two-pole commutator motor 20 as shown in the figure. The stator coil 24 can be overlapped with a part of the rotor coil 26 while maintaining the position of the stator coil 9 as shown in FIGS. The stator coil 24 can be prevented from protruding from the stator core 21 with respect to the protruding commutator motor 3.

The upright wall 23b is a vertical wall extending in the axial direction of the rotating shaft 25. The stator coil 24 is arranged on the upright wall 23b side by winding the stator coil 24 neatly and axially by the upright walls 22g. 24 can also be made hard to protrude from the stator core 21.

Next, the stator S and the rotor R are assembled to the electric blower 2 as the commutator motor 20.

When a main switch of a vacuum cleaner (not shown) is turned on, the rotor R is rotated by the current flowing through each of the coils 24 and 26, and the electric blower 2 blows the electric power generated by the rotation of the rotor R to perform the electric cleaning. The suction action as a fan can be obtained, and a part of the air blows through the electric blower 2.

At this time, when a part of the wind passes from the lower part to the upper part in FIG. 1 along the axial direction of the rotating shaft 25, the rotor coil 26 and the commutator 28 are efficiently formed by the shapes of the upright walls 22g and 22g. Is guided to the carbon brush 29, whereby the cooling effect accompanying the increase in power consumption can be sufficiently ensured, and the rise in temperature can be prevented.

In the above-described embodiment, the terminal block 22 having the upright wall 22g having an arc shape along the circumferential direction and the axial direction of the rotor coil 26 has been disclosed. For example, as shown in FIG. A base wall 32g having a tongue piece 32h and having an arc shape both in the circumferential direction and in the warp direction of the rotor coil 26 is provided on the base 3.
6, or a standing wall 4 having a tongue piece 42h and having an arc shape in the circumferential direction of the rotor coil 26 and having an inverted L-shaped cross section as shown in FIG.
The shape is not particularly limited, for example, the terminal block 42 is formed integrally with the base 42a of 2 g. In the case where the upright wall 42g has an inverted L-shaped cross section, the air stays at the inner corners of the wall to further improve the cooling effect.

[0026]

As described above, in the commutator motor according to the present invention, the terminal block is provided with the guide portion for guiding the wind toward the commutator, so that the cooling effect can be improved.
It is possible to prevent a rise in temperature due to a rise in power consumption.

[Brief description of the drawings]

FIG. 1 shows a commutator motor according to an embodiment of the present invention, and is a longitudinal sectional view of a main part of the commutator motor.

FIG. 2A is a plan view of a terminal block, and FIG. 2B is a front view of the terminal block.

FIG. 3 is a plan view of a main part in a state where a commutator motor is attached to the electric blower.

FIG. 4 is a plan view of a main part of a state where a commutator motor is attached to the electric blower.

FIG. 5 is a longitudinal sectional view of a main part of the commutator motor, showing a modification of the commutator motor according to the embodiment of the present invention.

FIG. 6 is a longitudinal sectional view showing another modification of the commutator motor according to the embodiment of the present invention, showing a main part of the commutator motor.

FIG. 7 shows a conventional commutator motor and is a longitudinal sectional view of a main part of the commutator motor.

FIG. 8 is a plan view of the terminal block.

FIG. 9 is a plan view of a main part of a state where a commutator motor is attached to the electric blower.

FIG. 10 is a half sectional view of the electric blower.

FIG. 11 is a side view of the vacuum cleaner, with a part thereof broken away.

[Explanation of symbols]

 Reference Signs List 20 commutator motor 21 stator core 22 terminal block 22g standing wall (guide portion) 24 stator coil 25 rotating shaft 26 rotor coil 27 rotor core 28 commutator 29 carbon brush

Claims (5)

[Claims] A stator mounted on the stator core, a stator coil wound over the stator core and the terminal block, and a rotating shaft penetrating the stator core, fixed to an intermediate portion of the rotating shaft. And a commutator fixed to one end of the rotating shaft on the side on which the terminal block is provided, and a pair of carbon brushes elastically contacting the commutator. In the motor, the terminal block is provided with a guide portion for guiding wind toward the commutator. 2. The apparatus according to claim 1, wherein said guide portion is formed on inner walls of a pair of upright walls where said stator coil is located, and said carbon brush is located between said pair of upright walls. The commutator motor as described. 3. The commutator motor according to claim 1, wherein the guide portion is a curved surface that covers a part of the rotor coil and has an inward cross section along a winding shape thereof. 4. The commutator motor according to claim 1, wherein the guide portion is a curved surface that covers a part of the rotor coil and that faces away from the winding shape and has an outward section. 5. The commutator motor according to claim 1, wherein the guide portion is a wedge surface that covers a part of the rotor coil and gradually approaches the commutator.