KR200168797Y1 - Electric current delivery structure of a motor - Google Patents

Abstract

The present invention relates to a power transmission structure of a motor for a cleaner, wherein a stator core is provided with a power transmission member for connecting one end of an armature coil, and the other end of the power transmission member is provided with a brush holder to apply power to a carbon brush. By bending the curved surface seated, it is possible to eliminate the wiring work of the armature coil and the lead wire connected to the carbon brush to transfer power to the carbon brush, thereby improving the workability accordingly and the power applied to the armature coil to the carbon brush. It is transmitted reliably, and the deformation of the carbon brush and the flame failure during operation of the motor can be prevented, thereby extending the life of the motor.

Description

Power Supply Structure of Cleaner Motor

The present invention relates to a power transmission structure of a motor for a cleaner, and more particularly, a cleaner for changing a transmission structure for transmitting power of an armature coil to a carbon brush side and maintaining a fixed position of the carbon brush. It relates to a power transmission structure of the motor.

In general, motors applied to household appliances such as vacuum cleaners are made by a commutator and a carbon brush that changes the direction of the rotor and the electric current rotated by the interaction of the magnetizing force generated in the stator in which the armature coil is wound. Driven.

Such a motor is protected by a rotor and a commutator by a housing made of aluminum by die casting. At this time, the housing acts as a source of vibration and noise during operation of the motor, so that the elastic modulus (stiffness) of the housing should be sufficiently considered to reduce the vibration and noise, and the heat should be properly cooled to prevent the motor's operating characteristics from changing. do.

1 is a diagram illustrating a motor applied to a conventional cleaner, in which a rotor shaft 14a rotatably inserted into a stator core 12 in which an armature coil 10 is wound and a stator core 12 are rotated. Both sides of the rotor 14 including the rotor 14 and the commutator 16 located thereon, and the carbon brush 18 and the stator core 12 to be installed at right angles to the commutator 16 to change the current direction It is fixed to the rotor 14 and the commutator 16 is composed of a housing 20 for protection support.

In the housing 20 located on the upper side, the bearing part 20a protrudes in the center so as to accommodate the bearing 22 interposed in the rotor shaft 14a, and air-cooled on both sides of the flat plate around the bearing part 20a. A plurality of ventilation holes 20b are provided to cool the motor in a manner, and fixing parts 20c having a through hole (not shown) are formed at both ends of the housing 20 so that the tie bolts 24 pass through the housing 20. Bent to

The pair of carbon brushes 18 are fixed to the commutator 16 so as to have an air gap (void) of a predetermined gap, and the brush holder 26 fixed to be spaced apart from each other on the horizontal line (180 °) at the outer periphery of the housing 20. Inserted in the brush holder 26, the fixing piece 26a to which the fixing member is tightened protrudes integrally on both sides of the brush holder 26, and the cover 28 is integrally mounted on the rear side of the brush holder 26.

In addition, one end of the lead wire 30 connected to the armature coil 10 is connected to the carbon brush 18 and the cover 28 by welding, and the commutator 16 and the carbon brush (to the brush holder 26). Various types of cooling vents 26b are provided for releasing frictional heat and current heat generated in 18) to the outside.

In the conventional cleaner motor configured as described above, when power is applied to the slot of the stator core 12 and the armature coil 10 wound on the slot, the effective magnetic flux direction generated from the armature coil 10 is perpendicular to the direction of the effective magnetic flux. As a result, the rotor 14 rotates by applying an electromagnetic force according to Fleming's left hand law.

At this time, the commutator 16 press-fitted to the rotor shaft 14a changes the positions of the commutator 16 and the carbon brush 18 when the rotor 14 is rotated to a right angle position. That is, when the commutator 16 is rotated by 90 ° with respect to the pair of carbon brushes 18 fixed to the housing 20 on the horizontal line, the carbon brushes through the lead wire 30 connected to the armature coil 10. The rotor 14 rotates continuously as the direction of the current (the direction of the effective magnetic flux) transmitted to the 18 is acted on the commutator 16 again.

Thereafter, as the rotor 14 rotates according to the above principle, an impeller (not shown) coupled to the other end of the rotor shaft 14a rotates at high speed and sucks foreign substances such as external air and dust. .

In addition, the friction heat generated by the commutator 16 and the carbon brush 18 during the operation of the motor is discharged to the outside through the plurality of ventilation holes 20b provided in the housing 20. At this time, the heat of friction and power generated by the friction of the commutator 16 and the carbon brush 18 inserted into the brush holder 26 to have a fine air gap therebetween are provided with various types of cooling vents provided in the brush holder 26 ( Through 26a).

However, since the lead wire for transferring the current of the amateur coil to the carbon brush is soldered to the brush holder cover and the carbon brush, respectively, as described above, the lead wire easily slips off as the carbon brush rubbed with the commutator flows. Not to be applied, of course, the flow of the carbon brush is not returned to the initial position there was a problem that the flame is not generated smooth operation of the motor.

The present invention is to solve the above problems, the object of the present invention is to improve the structure for transmitting current to the carbon brush and at the same time by returning the carbon brush to the initial position, it is possible to eliminate the wiring work of the lead wire In addition to improving workability, the current of the amateur coil is reliably transmitted to the carbon brush, and in particular, the deformation of the carbon brush and the spark failure are prevented during the operation of the motor. It is to provide a power transmission structure.

1 is a perspective view schematically showing a conventional cleaner motor,

Figure 2 is an enlarged perspective view of the main portion of the brush holder fixed to the housing of the motor shown in FIG.

3 is a perspective view showing a power supply structure of the cleaner motor according to the present invention;

Figure 4 is an enlarged perspective view of the main portion showing a state in which the power transmission structure according to the present invention is applied to a motor for a cleaner.

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

10: armature coil 12: stator core

14: rotor 16: commutator

50: brass piece terminal 50a: fixed end

50b: free end 50c: curved portion

Features of the present invention for achieving the above object, the housing for securing the rotor and commutator is fixed to both sides of the stator core winding the armature coil, a pair of brushes in which the carbon brush is inserted The holder is fixed, the brush holder is connected to the armature coil and the power transmission structure of the motor which is provided to transfer the current to the carbon brush, the stator core is the current applied to the armature coil to the carbon brush It is achieved by providing a current transfer member having a predetermined elasticity so that it can be delivered to.

Current transmission member according to a preferred embodiment of the present invention is fixed to the upper end of the stator core in order to connect one end of the armature coil to the fixed end, the other end to allow the brush holder to be seated at the free end The curved part is achieved by being a bent brass piece terminal.

Hereinafter, a preferred embodiment of the power transmission structure of the cleaner motor according to the present invention will be described in detail with reference to the accompanying drawings.

3 and 4 are diagrams showing a power transmission structure according to the present invention, in the present invention, the same parts of the configuration of the cleaner motor, the same reference numerals for convenience of description.

The housing 20 for protecting and supporting the rotor 14 and the commutator 16 is fixed to both sides of the stator core 12 on which the armature coil 10 is wound, and on the outer periphery of the upper housing 20 on a horizontal line. A pair of brush holders 26 spaced apart from each other are fixed by a fixing member, and a carbon brush 18 having an air gap with respect to the commutator 16 is inserted into the brush holder 26.

The upper surface of the stator core 12 is provided with a current transfer member having a predetermined elasticity to transfer the current applied to the amateur coil 10 to the carbon brush 18, the current transfer member is an amateur coil 10 One end of the brass piece terminal 50 is connected to the upper end of the stator core 12 by the fixed end portion 50a by soldering, and the free end portion 50b of the brass piece terminal 50 has a carbon brush 18. The curved surface portion 50c is bent so that the lower surface is seated and the fixed position of the carbon brush 18 can be returned to the initial state.

The operation of the power transmission structure of the cleaner motor according to the present invention configured as described above will be described in detail.

When the power is applied to the slot of the stator core 12 and the Amateur coil 10 wound around the slot, the rotor inserted to act perpendicular to the direction of the effective magnetic flux of the magnetic field generated in the Amateur coil 10 14 rotates with the rotor shaft 14a.

That is, when the rotor 14 rotates at 90 °, the current applied to the armature coil 10 passes through the free end 50b through the fixed end 50a of the brass piece terminal 50 provided on the upper surface of the stator core 12. And a current is directly applied to the carbon brush 18 which is seated on the curved portion 50c of the free end 50b, and the commutator 16 is again caused by the magnetic field generated by the carbon brush 18. Since the rotor is rotated by 90 °, the rotor 14 rotates without stopping.

When the carbon brush 18 is biased downward due to friction with the commutator 16, the carbon brush 18 returns to the initial position by the elastic force of the curved portion 50c that is bent on the brass piece terminal 50. The heat of friction and the power of heat generated by the friction of the carbon brush 18 are discharged to the outside through the plurality of ventilation holes 20a and 26a provided in the housing 20 and the brush holder 26.

According to the power transmission structure of the cleaner motor according to the present invention as described above, by improving the structure for transmitting the current to the carbon brush and at the same time returning the carbon brush to the initial position, it is possible to eliminate the wiring work of the lead wire In addition to improving workability, the current of the amateur coil is reliably transmitted to the carbon brush, and the life of the motor can be extended by preventing deformation and spark failure of the carbon brush during operation of the motor.

The present invention is not limited to the above-described specific preferred embodiments, and any person having ordinary skill in the art to which the present invention pertains may make various modifications without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Claims (2)

Housings for protecting and supporting the rotor and the commutator are fixed to both sides of the stator core on which the armature coil is wound, and a pair of brush holders in which carbon brushes are inserted are fixed to the housing, and the armature coil and In the power transmission structure of the motor that is connected and provided to transfer the current to the carbon brush, The stator core is provided with a current transfer member having a predetermined elasticity to directly transfer the current applied to the armature coil to the carbon brush. The curved surface of claim 1, wherein one end of the current transfer member is fixed to an upper surface of the stator core to connect one end of the armature coil to a fixed end, and the other end is curved to allow the brush holder to be seated at a free end. Power transmission structure of the motor for a cleaner, characterized in that the additionally bent brass piece terminal.