KR20000059723A - Motor for Preventing a noise - Google Patents

Abstract

An anti-noise motor is disclosed that can reduce the noise of contact between a brush and a brush holder by improving the brush holder structure of the rectifying system. The present invention provides at least one brush (vertical) formed in a direction perpendicular to the rotating body, a spring attached to the brush to pressurize the brush to minimize contact resistance during rectification, and the brush to smoothly guide the reciprocating motion of the brush. And a brush holder enclosing the brush holder, the brush holder having protrusions protruding toward the brush side on the upper and lower plates of the brush holder in the rotational body direction, and a through groove capable of having a traction function. It can cope flexibly with the movement of the brush such as left and right shake, and can reduce the noise of contact with the brush.

Description

Motor for Preventing a Noise

The present invention relates to a control motor with a brush, and more particularly, to an anti-noise motor that can reduce the contact noise between the brush and the brush holder through the improvement of the brush holder structure of the rectification system.

Precision small motors for control are being used in a variety of applications such as sound equipment, imaging equipment, information equipment, office equipment, FA and industrial equipment, and automobile electric equipment, which are rapidly growing in recent years. Induction motors and direct current electric motors have contributed to industrial and economic development for nearly a century as a driving source for industrial machines. Motors and their products are in the same relationship as two wheels of a cart that cannot be separated from each other.

Advances in miniaturization, high performance, low cost, and diversification of such motors are remarkable to this day, and motors with new principles, new configurations, and functions will continue to be developed.

Brushless DC motors have contributed significantly to the development of the industry to this day as an important driving force in parallel with the production or induction motors. Since the elongation is proportional to GNP, it can be said that there is no prosperity today without a DC motor. On the other hand, induction motors are overwhelming because they are robust, inexpensive, and suitable for constant speed continuous operation.However, in the case of small motors, they have excellent controllability despite the shortcomings of brush life. The motor is used steadily.

FIG. 1 is a cross-sectional view schematically showing the structure of a motor using a general brush, and is largely composed of a rectifying system 10, an amateur core 20, and a switching system 30 around a rotating body 5.

The gist of the present invention relates to the rectifying system 10, the description of the amateur core 20 and the switching system 30 will be weak.

Referring to FIG. 2, which shows an enlarged view of the rectifying system 10 according to the prior art, the rectifying system 10 is in contact with a brush 12 and a rotating body or commutator 15 that is in contact with the brush 12. In order to minimize the contact resistance during commutation, the spring 14 which acts as a pressurization in the direction of the arrow so that the current can be conducted smoothly, and the brush 12 in consideration of the wearability of the brush 12 so that the movement of the brush 12 is desired. And a brush holder 16 surrounding the brush 12 serving as a guide.

3 is a cross-sectional view taken along the line AA ′ of FIG. 2. Referring to FIG. 3, the brush 12 is driven by contact with the commutator 15 which rotates in the direction of the arrow. Therefore, since the brush 12 shakes left and right in contact with the commutator 15 in addition to the reciprocating motion, the brush 12 and the brush holder 16 cannot be completely coupled. 'G' in FIG. 3 represents a constant distance between the brush 12 and the brush holder 16.

Therefore, when the contact between the brush 12 and the commutator 15 is caused by the gap g between the brush 12 and the brush holder 16, severe contact noise with the brush holder 16 due to the shaking of the brush 12 is accompanied. I have a problem.

In addition, as the use time is prolonged, the wear rate of the brush 12 is inevitably worsened.

Accordingly, the present invention has been made to solve the above problems, an object of the present invention is to provide a noise prevention motor that can reduce the contact noise while reducing the wear rate of the brush through a simple structure improvement of the brush holder.

1 is a cross-sectional view schematically showing a general motor,

2 is an enlarged view of the rectification system of FIG.

3 is a cross-sectional view taken along the line AA ′ of FIG. 2;

4 is an enlarged view of a rectification system of a motor according to the present invention;

5 is an enlarged view of a brush and a brush holder of FIG. 4;

6 is a perspective view showing in detail the brush holder in FIG.

6A is a front view of FIG. 6.

* Description of the symbols for the main parts of the drawings *

100-Rectifier System 105-Commutator

110-Motor Brush 120-Spring

130-brush holder

132a-Holder top plate 132b-Holder bottom plate

134a, 134b-protrusions

136a, 136b-U-shaped through holes

The present invention for achieving the above object is a control motor comprising a brushed rectifying system, an amateur core, and a switching system surrounding the rotating body of the motor,

The commutation system includes at least one brush perpendicular to the rotating body, a spring attached to the brush to pressurize the brush to minimize contact resistance during commutation, and smoothly guide the reciprocating motion of the brush. And a brush holder surrounding the brush to

The brush holder is in contact with the brushes of the upper and lower brushes of the brush holder in the direction of the rotating body in order to prevent abrasion and contact noise of the brush due to the left and right shake of the brush when the brush is in contact with the rotating body. Each of the protrusions protruding toward the brush side is provided.

Preferably, the protrusion is characterized in that the contact with the brush is formed in a round shape in consideration of the wearability with the brush.

In addition, the brush holder further comprises at least one through groove for applying a tension action to the adjacent portions of the upper and lower centers of the brush holder so as to fluidly fix the brush. The hole has a U-shape when viewed in the direction of insertion of the brush, and the U-shaped through grooves are preferably formed in two, one at both ends of the left and right sides of the brush.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is an enlarged cross-sectional view showing a rectification system having a brush according to the invention, Figure 5 is a view showing in detail the structure of the brush and brush holder according to the present invention, and Figure 6 is a brush holder according to the present invention The perspective view which shows the structure of this in detail is shown, respectively.

4 and 5, the rectifier system 100 of the motor according to the present invention includes a brush 110 and a contact resistance during commutation in which the brush 110 is in contact with a rotating body or a commutator 105 that is a contact object. The guide 120 so that the movement of the brush 110 can be desired in consideration of the wearability of the spring 120 and the brush 110 in the direction of the arrow so that the current can be conducted smoothly to minimize the It is configured to include a brush holder 130 surrounding the brush 110 to perform a role.

Hereinafter, the structure of the brush holder 130 according to the present invention will be described with reference to a perspective view of FIG. 6 showing an enlarged structure of the brush holder 130 and FIG. 6A showing a front view of FIG. 6.

The brush holder 130, in contact with the brush 110 and the rotating body or commutator 105, in order to prevent the wear and contact noise of the brush due to the left and right shake of the brush 110, the rotating body 105 Projections 134a and 134b protruding in the reciprocating direction of the brush 110 are provided on the upper plate 132a and the lower plate 132b of the brush holder 130 in the lateral direction, respectively.

In this case, the protrusions 134a and 134b are protruded only at a central portion that is in direct contact with the brush 110 during the reciprocating movement of the brush 110, as shown in FIG. 6A. In addition, the protrusions 134a and 134b may be formed in a round shape in contact with the brush in consideration of contact wearability with the brush 110.

Furthermore, the brush holder 130 according to the present invention is tensioned at positions adjacent to the central portions of the upper plate 132a and the lower plate 132b of the brush holder 130 so as to fluidly fix the brush 110. It further comprises at least one through groove (136a, 136b) to give a tension action, the tension through groove (136a, 136b) as shown in Figure 6 when viewed in the insertion direction of the brush 110 , U-shaped.

In addition, the position and the number of the U-shaped through grooves 136a and 136b may be determined in consideration of the size of the brush or the size of the upper plate 132a and the lower plate 132b of the brush holder to give an optimal twist.

In this embodiment, in order to give an optimum tensioning action, as shown in Fig. 6, two U-shaped through-grooves are designed to be provided at the left and right ends of the brush one by one.

As described above, in the present invention, the brush holder 130 of the rectifying system 10 includes the through grooves 136a and 136b and the protrusions 134a and 134b, which may have a traction function, such that the brush shakes left and right. It flexibly copes with the movement of the brush and can absorb and reduce the noise of contact with the brush.

Next, the operation of the motor to which the rectifying system having the above-described structure is applied will be briefly described with reference to FIG. 1.

When the power is supplied to the commutator 105 which is a rotating body through the motor brush 110, a magnetic field is formed in the wound coil and the armature core 20 is rotated by the action of the formed magnetic field and the magnet 22, The motor rotating shaft 5 connected to the shaft hole of the amateur core 20 is rotated. The rotary shaft 5 of the motor rotates the conductive terminal piece 32 of the switching terminal 35 to turn on and off the power flowing through the switching brush 31a to the switching brush 31b.

This invention can be implemented in other various forms, without deviating from the mind or main character. Therefore, the above-described embodiments are merely examples in all respects and should not be interpreted limitedly. The scope of the present invention is shown by the Claims, and is not restrict | limited by the specification body. In addition, all the deformation | transformation and a change which belong to the equal range of a claim are within the scope of this invention.

As described above, according to the present invention, a simple structure improvement of the brush holder can reduce the wear rate of the brush and reduce the contact noise. That is, according to the present invention, through the structural improvement of the brush holder having a through groove and a protrusion which can have a tension function, it is possible to flexibly cope with the movement of the brush such as the left and right movement of the brush, and to contact the brush. Demonstrates the effect of reducing noise.

Claims (5)

In a control motor comprising a brushed rectifying system, an armature core, and a switching system surrounding a rotating body of the motor, The rectification system, At least one brush formed in a direction perpendicular to the rotating body; A spring attached to the brush to press the brush to minimize contact resistance during rectification; And And a brush holder surrounding the brush to smoothly guide the reciprocating movement of the brush, The brush holder is in contact with the brushes of the upper and lower brushes of the brush holder in the direction of the rotating body in order to prevent abrasion and contact noise of the brush due to the left and right shake of the brush when the brush is in contact with the rotating body. Noise prevention motor, characterized in that each provided with a protrusion projecting toward the brush side. The method of claim 1, The protrusion is a noise prevention motor, characterized in that the contact with the brush is formed in a round shape in consideration of the wearability with the brush. The method of claim 1, The brush holder further includes at least one through-groove for tensioning the adjacent upper and lower portions of the center of the brush holder to fluidly fix the brush. . The method of claim 3, wherein the tension through groove, Noise prevention motor, characterized in that the U-shaped through groove when viewed in the insertion direction of the brush. The method of claim 4, wherein the U-shaped through groove, Noise preventing motor, characterized in that formed in two one by one at both ends of the left and right sides of the brush.