JPS6194537A - Motor - Google Patents

Abstract

PURPOSE:To prevent a rotary pole and a commutator from being abraded, by a method wherein the rotary pole is organized to be automatically rotated by the rotation of the commutator, and wherein the commutator is electrically communicated with an electrode ring via a rotary brush. CONSTITUTION:With the rotation of a commutator 27, a rotary pole 30 formed in a columnar shape within a rotary brush a arranged in an electrode ring 31, 32 rotates automatically and comes in contact with the commutator 27, and at the same time, a plurality of rotary brushes a or insulating brushes b come in contact with a piece of commutator segment 26. In this manner, the brush comes in contact with the commutator segment in good order, and the rotary pole and the commutator are prevented from being abraded, and the service of a motor can be prolonged.

Description

DETAILED DESCRIPTION OF THE INVENTION This field of industrial application relates to a power supply structure for a motor that protects a commutator. As shown in FIG. 6, a rotor 4 is fixed to an armature shaft 1 and consists of a plurality of armature windings 2 and an armature core 3, and a pair of permanent magnets 5 are arranged concentrically around the outer circumference of the rotor 4. , a commutator 7 is provided on the armature shaft 1 by arranging a plurality of commutator pieces 6 connected to the armature winding 2 on a circumferential surface to form a p7η structure.
A pair of brushes 8 and 9 made of a conductive material such as carbon and molded into a prismatic shape are brought into contact with each other almost perpendicular to the surface (see, for example, Shota Miyairi's ``Latest Electrical Equipment Engineering'', (
October 25, 1972), Maruzen, P9). In addition, FIG. 6 shows a sectional view taken along line A-A in FIG. 5, and also shows 10.1
1 is a spring for pushing the brush 8.9 against the insulator 7 by one inch, 12.13 is a connecting wire for supplying electricity to the brush 8.9, and 14.15 is the brush 8.9 and spring 10. ．．
The brush holder that holds 11, 16 is electric! Iu
The frame of J machine, 1718 indicates the bearing.

In the second configuration below, the DC type 1 is connected between the connecting wires 12 and 13.
When L is applied, a current flows to the armature winding 2 through the brush 8.9 and the commutator piece 6 of the commutator 7, and the Tu armature winding generates magnetic force, which is combined with the magnetic force of the permanent magnet 5. As a result of this action, the rotor 4 and commutator 7 begin to rotate and come to work as an electric lvj machine.

An invention! However, in such a configuration, the brush d1
9 is pressed against the surface of the commutator 7, and the brush 8.
When the brush 9 slides on the surface of the commutator 7, the wear of the brush 9 and the commutator piece 7 is significant, resulting in a short service life and high noise.

In order to solve these problems, the present invention provides a means for solving the problem of P.
A pair of electrode rings, an anode and a cathode, made of a conductor divided into two parts in a plane is provided, and a rotating brush made of a conductor and an insulating brush made of an electrical insulator are arranged between the commutator and the electrode ring, The rotating brush is composed of a brush holder and a rotating pole on a cylinder that rotates inside the brush holder, and the rotating shaft rotates on its own axis due to the rotation of the commutator, and the insulating brush is configured as a rotating brush. They have the same configuration, and conduct electricity between the commutator and the electrode ring via the rotating brush, and - a plurality of rotating brushes or insulating brushes are in contact with one commutator piece in the circumferential direction of the commutator. This is how it was done.

By passing current through the commutator through the working electrode ring and the rotating brushes, the rotor acts as a rotating shear motor. On the other hand, as the rotor rotates, the commutator also rotates.
Embodiment Next, an embodiment of the present invention will be described with reference to the drawings. Explain using.

As shown in FIG. vJ machine has armature shaft 2
1 and a plurality of armature windings 22 and armature core 2
A pair of permanent magnets 25 are arranged concentrically around the outer circumference of the rotor 24, and a plurality of commutator pieces 26 connected to the armature winding 22 are arranged on the armature shaft 21 on the circumferential surface. A commutator 27 arranged above is provided, and the commutator 2
As shown in FIG. 3, the brush holder 28 is formed in a U-shape around the outer periphery of the brush holder 28, and has a pole 30 formed in a cylindrical shape that rotates around a rotating shaft 29. A rotating brush a is arranged. In addition, the rotating brush has a feeding spring 33 made of a conductive plate 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. The electrode rings 30 and 31 contact the commutator 27 while rotating due to the rotation of the child 27, and continue to be energized between the commutator 27 and the electrode rings 30 and 31 via the brush holder 28 and the power supply spring 33.

In addition, the pair of electrode rings 30.31 are arranged in two pieces in a plane perpendicular to the armature shaft 21 as shown in FIG. A plurality of insulating brushes b made of the same insulator as the rotating brush a as shown in the figure are arranged, and the rotating brush a and the insulating brush b
The single electrode ring 30 and 31 constitute a bearing for the armature shaft 21. As shown in FIG. 4, the insulating brush b has the same structure as the rotating brush a, 34 is an insulating brush holder, 35
is an insulated rotating shaft, 36 is an insulated rotating pole, and the insulated brush b also connects the insulated rotating pole 36 to the commutator 27 by the force of the power supply spring 33.
is forcing it on. Furthermore, two rotating brushes a or two insulating brushes b are in contact with one commutator piece 26 constituting the commutator 27 in the circumferential direction of the commutator 27. Note that 37 is an insulating ring for electrically insulating the electrode ring 30, 31 and the motor frame 41, 38, 39 is a connecting wire for applying voltage to the electrode ring 30, 31, and 40 is a bearing. .

In the above configuration, when a voltage is applied between the connecting wires 3 and 39, a current flows to the armature winding 22 via the electrode ring 30, 31, the rotating brush a, and the commutator 27, and the armature winding 22 A magnetic force is generated, and the rotor 24 and commutator 27 begin to rotate due to the action of the magnetic force of the permanent magnet 25, and come to work as an electric motor.

Effects of the Invention According to January, when the commutator rotates, the cylindrical rotating pole in the rotating brush arranged in the electric spool ring rotates and comes into contact with the commutator, and at the same time, the commutator pieces Since multiple rotating brushes or insulating brushes are in contact with one brush, good contact between the brushes and commutator pieces is achieved, which significantly reduces wear on the rotating poles and commutator, significantly extending the life of the motor. can be improved. 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, making it possible to create a very quiet commutator motor.

[Brief explanation of drawings]

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 the line A--A in FIG. 5. a... Single rotation brush, b... Insulating brush, 26 commutator pieces, 27... Commutator, 28... Brush holder,
29... Rotation axis, 30... Rotation pole, 31.3
2... Electrode ring, 33 Power supply spring, 34 Insulated brush holder, 35... Insulated rotating shaft, 36... Insulated rotating pole. Name of agent: Patent attorney Toshio Nakao and 18 others 1
Figure 3 Hiro

Claims (1)

[Claims] A pair of electrode rings, an anode and a cathode, made of a conductor divided into two parts concentrically with the commutator and within a plane perpendicular to the armature axis are provided around the outer circumference of the commutator, and between the commutator and the electrode ring. An insulated brush consisting of a rotating brush made of a conductor and an electrical insulator and having the same structure as the rotating brush is disposed on the holder, and the rotating brush is composed of a brush holder and a rotating pole on a cylinder that rotates inside the brush holder. , and a rotary pole rotates on its own axis as the commutator rotates, and current is applied between the commutator and the electrode ring via the rotating brush, and the circumference of the commutator is adjusted for each commutator piece. An electric motor with multiple rotating brushes or insulated brushes touching each other in one direction.