JPS6194539A - Motor - Google Patents

Abstract

PURPOSE:To prevent a rotary pole and a commutator from being abraded, by a method wherein the rotary pole formed in a columnar shape within a rotary brush arranged in an electrode ring rotates automatically and is organized to come in contact with the commutator. CONSTITUTION:When voltage is applied between connecting wires 38, 39, then current flows through an armature winding 22 via an electrode ring 30, 31, a rotary brush (a), and a commutator 27, and magnetic force is generated by the armature winding 22, and with the action of the magnetic force of a perma nent magnet 25 in addition to the winding 22, a rotor 24 and the commutator 27 are rotated. In this case, a rotary pole 30 formed in a columnar shape within the rotary brush (a) arranged in an electrode ring 32 rotates automatically and comes in contact with the commutator 27, with the rotation of the commuta tor 27, and so the rotary pole 30 and the commutator 27 are prevented from being abraded and the service life of a motor can be prolonged.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a power supply structure for a motor using a commutator.

BACKGROUND OF THE INVENTION Conventionally, as shown in FIGS. 5 and 6, this type of electric motor is fixed to an armature shaft 1 and has a rotor 4 consisting of a plurality of electric motor child windings 2 and an armature core 3, A pair of permanent magnets 5 are arranged concentrically around this outer periphery, and the armature shaft 1
is provided with a commutator 7 configured by arranging a plurality of commutator pieces 6 connected to the armature winding 2 on a circumferential surface, and a conductive material such as carbon, for example, is provided almost perpendicularly to the surface of the commutator 7. A pair of brushes 8 and 9 formed into a prismatic shape were brought into contact with each other. (For example, Shota Miyairi, "Latest Electrical Connectivity Engineering," (October 25, 1972), Maruzen, P9). Note that Figure 6 is the 5th
In addition to showing the A-AIMm plane view in the figure, 10.1
1 is a brush 8.9f: a spring for pressing against the commutator 7, 12.13 is a connecting wire for supplying electricity to the brush 8.9, 14.15 is a brush 8.9 and a spring 10.11
The brush holder 116 that holds the motor is the frame of the motor, and 17 and 18 are the bearings.

In the configuration shown below, when a DC voltage is applied between the connecting wires 12 and 13, a current flows to the armature winding 2 through the brushes 8 and 9 and the commutator pieces 6 of the commutator 7, and the Winding 2
generates magnetic force, and due to the action of the magnetic force of the permanent magnet 5, the rotor 4 and commutator 7 begin to rotate, and work as an electric motor.

Problems to be Solved by the Invention However, in such a configuration, Plano 8.
9 is pressed against the surface of the commutator 7, and the brush 8.
9 slides on the surface of the commutator 7, there is a problem that the plan 8.9 and the commutator piece 7 are significantly worn, the front packing is short, and the noise is high.

Means for Solving All Problems In order to solve all of these problems, the present invention provides a pair of electrode links of an anode and a cathode made of a conductor concentrically around the outer circumference of the commutator. A rotating brush made of a conductor and an insulating brush made of an electrical insulator are disposed between the commutator and the electrode ring, the rotating brush comprising a brush holder and a rotating pole of a cylindrical ball rotating inside the brush holder,
Further, the rotary pole is configured to rotate due to the rotation of the commutator, and the insulating brush has the same configuration as the rotation plan, so that the commutator and the electrode ring are fully energized through the rotation plan. be.

By passing current through the commutator through the working electrode ring and rotating brushes, the rotor is rotated and acts as an electric motor. On the other hand, as the rotor rotates, the commutator also rotates, and the rotating pole that is in contact with the rotor rotates between the commutator and the electrode ring, while continuing to energize the electrode ring and the commutator via the rotating brush.

Example An embodiment of the present invention will be briefly described with reference to the drawings.

As shown in FIG. 1, the electric motor of the present invention includes a rotor 24 fixed to an armature shaft 21 and consisting of a plurality of armature windings 22 and an armature core 23, and a pair of permanent magnets concentrically arranged around the outer circumference of the rotor 24. 25, and the armature shaft 21 is provided with a commutator 27 configured by arranging a plurality of commutator pieces 26 connected to the armature winding 22 on a circumferential surface. As shown in FIG. 3, a rotating pole 30 formed in a cylindrical shape that rotates around a rotating shaft 29 is provided in a brush holder 28 formed in a mouth shape, and a rotating pole 30 formed as a conductor is provided. Brush a is arranged. In addition, the rotating brush has a power feeding spring 33 made of a plate-shaped conductive spring inserted between the electrode rings 31 and 32, and the rotating pole 30 is pressed against the commutator 27 by the force of this spring. contacts the commutator 27 while rotating due to the rotation of the commutator 27, and continues to be energized between the commutator 27 and the electrode links 30, 31 via the brush holder 28 and the power supply spring 33. Further, a pair of electrode rings 30, 31 are arranged 6--in parallel to the longitudinal direction of the armature shaft 21 as shown in FIG.
The rotating brushes a in both rings 30.31 have a positional relationship of 180° with respect to the rotation center of the armature shaft 21, and the rotating brushes a in both rings 30. A plurality of insulating plans b made of insulators having the same structure as the rotating brush a are arranged, and the rotating brush a and the insulating brush b electrode links 30 and al constitute a +1M+ support of the armature shaft 21. As shown in FIG. 4, the insulating brush b has the same structure as the rotating brush a, and 34 is an insulating brush holder;
Reference numeral 5 indicates an insulated rotating shaft, 36 indicates an insulated rotating pole, and the insulated brush b also presses the insulated rotating pole 36 against the commutator 27 by the force of the power supply spring 33. In addition, 37 is an electrode ring 30.
31 and an insulating ring for electrically insulating the frame 41 of the motor, and 38 and 39 are electrode rings 3
0.31 is the connecting wire for applying voltage, and 40 is the bearing.

In the configuration below, when a voltage is applied between the connecting wires 38 and 39, a current flows to the armature winding 22 through the electrode ring 30, 31, the rotating brush a and the commutator 27 (!-), and the armature winding 22 generates a magnetic force, and due to the action of the magnetic force of the permanent magnet 25, the rotor 24 and commutator 27 begin to rotate, and work as an electric motor.

Effects of the Invention According to the present invention, as the commutator rotates, the cylindrical rotating pole in the rotating brush disposed in the electrode ring comes into contact with the commutator while rotating. It can significantly reduce the wear and tear of the motor, and greatly extend the lifespan of the motor.

On the other hand, since the contact between the rotating pole and the commutator is rotational contact, the generation of sliding noise can be significantly reduced, and a very quiet commutator motor can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of an electric motor according to an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along the line B-B in Fig. 1, Fig. 3 is a perspective view of a rotating brush, and Fig. 4 is a perspective view of an insulating brush. , FIG. 5 is a sectional view showing a conventional configuration, and FIG. 6 is a sectional view taken along line A--A in FIG. 5. a...Rotating brush, b...Insulating brush, 26...Commutator piece, 27...Commutator, 2nd...Brush Cage, 29...Rotating shaft, 30...Rotating pole, 31.32...i
・Electrode ring, 33... Power feeding blade, 34...
...Insulated brush retainer, 35...Insulated rotating shaft, 36...Insulated rotating pole. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
Figure 2γ Figure 4

Claims (3)

[Claims] (1) A pair of electrode rings, an anode and a cathode made of a conductor, are provided around the outer periphery of the commutator concentrically with the commutator, and a rotating brush made of a conductor is arranged between the commutator and the electrode ring; The rotating brush consists of a brush holder and a rotating pole on a cylinder that rotates inside the brush holder, and the rotating pole rotates along with the rotation of the commutator. Electric motor in energized state. (2) The pair of electrode rings are arranged in parallel in the longitudinal direction of the rotating shaft, and the rotating brushes in both rings have a positional relationship of 180 degrees with respect to the rotation center of the rotating shaft. The electric motor according to item 1. (3) A patent claim in which an insulating brush made of an electrical insulator and having the same structure as the rotating brush is disposed between the commutator and the electrode ring in the part where there is no rotating brush, and the rotating brush, the insulating brush, and the electrode ring constitute a bearing. The electric motor according to item 1 or 2 of the range.