KR100307232B1 - Full automatic washing machine - Google Patents

Abstract

The present invention relates to a bushing of a rotor shaft coupled to a motor of a full-automatic washing machine. In particular, a flat portion is provided at the end of the inclined surface of the bushing to widen the cross-sectional area of the end of the bushing. It is designed to prevent melting easily,

Due to the heat generated when the motor is driven, the bushing coupled to the rotor shaft melts so that the lower bracket and the lower bearing coupled to the rotor deflect in the rotor direction, thereby widening the cross-sectional area of the end of the bushing to enhance the coping force by the heat. The bushing structure of the rotor shaft of the fully automatic washing machine provided with the flat part in the inclined surface end part of a bushing is provided.

Description

Bushing structure of rotor shaft of fully automatic washing machine {FULL AUTOMATIC WASHING MACHINE}

The present invention relates to a bushing of a rotor shaft coupled to a motor of a full-automatic washing machine. In particular, a flat portion is provided at the end of the inclined surface of the bushing to widen the cross-sectional area of the end of the bushing. It relates to a bushing structure of a rotor shaft of a fully automatic washing machine to prevent easy melting.

1 is a cross-sectional view illustrating a structure of a general clutch washing machine, in which a washing machine 1 includes a shaft 11 for transmitting rotation of a motor 10 composed of a rotor 12 and a stator 13, and the shaft 11. Rotation force from the first pulley (9) to rotate with, the second pulley (7) receiving the rotational force by the belt (8) from the first pulley (9), and the second pulley (7) Receives the clutch (6) and the inner blade to rotate and coupled to the drive shaft (5) rotates by the operation of the clutch 6 and the clutch (6) to control the speed transmitted to the drive shaft (5) is received and rotated The tub 3 and the outer blade 2 which couple | bond the said washing | wing blade 4 and the inner tub 3 are comprised.

Referring to the effects of the configuration as described above are as follows.

First, the rotor 12 rotates due to the electrode difference between the rotor 12 and the stator 13 of the motor 10, and the rotor 12 transmits power to the shaft 11 to thereby transmit the first pulley 9. Rotated).

In addition, the first pulley 9 transmits power to the clutch 6 by transmitting rotational force to the second pulley 7 by the belt 8.

In addition, the clutch 6, which has received the rotational force by the second pulley 7, rotates the drive shaft 5 by adjusting the received power and intermittently controlling the power.

In this case, since the washing blade 4 and the inner tub 3 are coupled to the drive shaft 5, the washing blade 4 and the inner tub 3 rotate under the control of the clutch 6 to wash the laundry. will be.

And, Figure 2 is a cross-sectional view showing a state in which the bushing is coupled to the conventional motor, the motor 10 is the first pulley from the rotor 12 that rotates by the electrode difference between the rotor 12 and the stator 13 ( 9) maintains a gap between the shaft 11 for transmitting the rotational force to the shaft, the upper bearing 17 and the lower bearing 16 supporting the shaft 11, and the lower bearing 16 and the rotor 12. Bushing 20 is formed with an inclined surface 22 is coupled between the lower bearing 16 and the rotor 12 to the upper, and the upper bracket 15 and the lower coupled to the upper and lower to protect the motor 10 It is a structure provided with the bracket 14.

3 is a main sectional view showing a state in which a bushing is deformed by a row of a conventional rotor, and a shaft 11 coupled to the rotor 12 to rotate together with the rotor 12, and the rotating shaft 11. An inclined surface 22 coupled between the upper bearing 17 and the lower bearing 16 to support the lower bearing 16 and the rotor 12 so as to maintain a gap between the lower bearing 16 and the rotor 12. The formed bushing 20 and the lower bracket 14 is coupled to the upper bracket 15 to protect the rotor 12 is configured.

Referring to the operation effect according to the configuration as described above, the bushing 20 is coupled between the lower bearing 16 and the rotor 12 supporting the shaft 11 to the motor 10 for generating the power, the lower bearing The distance between the 16 and the rotor 12 is maintained.

However, when power is supplied to the motor 10 and the rotor 12 rotates due to an electrode difference from the stator 13, high temperature heat is generated from the rotor 12.

In addition, the high temperature heat generated by the rotor 12 is transferred to the bushing 20 which is in direct contact with the rotor 12, thereby maintaining a gap between the lower bearing 16 and the rotor 12. The temperature of rises.

At this time, the inclined surface 22 was formed at the lower end 21 of the bushing 20 due to the protrusion 18 formed at the bottom of the rotor 12.

Therefore, as the temperature of the bushing 20 increases, the lower end portion 21 of the sharp bushing 20 in contact with the rotor 12 is easily melted as shown by the dashed-dotted line of FIG. 3.

In addition, the bushing 20 is melted, and the lower bracket 14 and the lower bearing 16 coupled thereto sag toward the rotor 12, causing the rotor 12 to restrain.

When the power is supplied to the motor 10, the bushing 20 rotates together with the shaft 11 by a distance generated by melting the lower end 21 of the bushing 20 due to the magnetic field generated by the stator 13. And it rises to the height of the stator 13.

In addition, when the power supplied to the motor 10 is cut off, the magnetic field generated in the stator 13 is extinguished so that the bushing 20 falls down again.

On the other hand, the washing machine 1 controls the on / off time of the motor 10 during washing or rinsing to form water flow.

Therefore, whenever the power source of the motor 10 is turned on / off to form the water flow, the bushing 20 is influenced by the magnetic field of the stator 13 and rises or falls, thereby making noise in the motor 10. It was a cause of occurrence.

In addition, the first and second pulleys 9 and 2 that transmit power to the clutch 6 are caused by a change in the gap between the rotor 12 and the lower bearing 16 as the bushing 20 rises or falls. A problem arises in that the tension of the belt 8 connecting (7) is not constant.

The present invention for solving the conventional problems and the like,

The purpose of the present invention is to prevent the bushing from melting easily by heat generated in the rotor.

The present invention for achieving the above object,

It is possible to achieve the object of the present invention by providing a flat portion at the end of the inclined surface of the bushing to widen the cross-sectional area of the end of the bushing so as to strengthen the corresponding force by heat.

1 is a cross-sectional view showing the structure of a typical clutch washing machine

Figure 2 is a cross-sectional view showing a state in which the bushing is coupled to the conventional motor

Figure 3 is a sectional view of the main part showing a state in which the bushing is deformed by the heat of the conventional rotor.

4 is a perspective view of the bushing of the present invention;

5 is a sectional view showing the main parts of a bushing coupled to the motor of the present invention;

<Code Description of Main Parts of Drawing>

101-Rotor 102-Overhang

103-Lower bearing 104-Shaft

105-Lower Bracket

111-Bushing 112-Protruding Jaw

113-Insert groove 114-Slope

115-Flat section 116-Reinforcement rib

121-Shock Absorber

4 is a perspective view of the bushing of the present invention, in which the flat portion 115 formed at the end of the inclined surface 114 of the bushing 111 and the flat portion 115 are in contact with each other to widen the cross-sectional area so that a corresponding force against heat can be enhanced. A plurality of reinforcing ribs 116 formed on an outer circumferential surface of the bushing 111 to radiate heat of the high temperature received from the rotor 101 to the outside, and the plurality of reinforcing ribs

Insertion groove 113 formed in the protruding jaw 112 of the bushing 111 is formed 116, the insertion groove

Buffer member to be inserted into the 113 to relieve the repeated load generated from the rotor 101

It is a structure provided with 121.

5 is a main sectional view showing a state in which a bushing is coupled to a motor of the present invention, a shaft 104 coupled to the rotor 101 and rotating together with the rotor 101 and supporting the shaft 104. A bushing 111 having an upper bearing and a lower bearing 103, an inclined surface 114 coupled between the lower bearing 103 and the rotor 101 to maintain a gap, and a corresponding force by the heat of the bushing 111. The outer circumferential surface of the bushing 111 to radiate heat to the outside of the plane portion 115 formed at the end of the inclined surface 114 and the rotor 101 transferred to the plane portion 115 to the outside to strengthen the A plurality of reinforcing ribs 116 formed on the insertion groove 113 in the protruding jaw 112 of the bushing 111 in which the reinforcing ribs 116 are formed and the insertion groove 113 are inserted into the rotor 101. In order to protect the inside of the shock absorbing member 121 and the motor 101 to buffer the repeated load generated in the) It is a structure having a lower bracket 105 coupled with the upper bracket.

The effect of the above configuration, the rotor 101 is rotated by the electrode difference with the stator when power is supplied to the motor to drive the washing machine.

Then, the rotational force of the rotor 101 is transmitted to the clutch by the shaft 104 to rotate the washing wing and the inner tub to perform the washing process.

At this time, when the motor rotates, high temperature heat is generated in the stator and the rotor 101 inside the motor.

Then, the high temperature heat generated by the rotor 101 is transferred to the bushing 111 in contact with the flat portion 115.

In addition, the high temperature heat transferred to the bushing 111 is radiated to the outside by a plurality of reinforcing ribs 116 formed on the outer circumferential surface of the bushing 111.

That is, the bushing 111 rotates together with the shaft 104 such that a plurality of reinforcing ribs 116 formed on the outer circumferential surface of the bushing 111 also rotate.

In addition, the plurality of reinforcing ribs 116 rotate and radiate heat of high temperature of the rotor 101 transferred to the flat part 115 to the outside.

In addition, the planar portion 115 of the bushing 111 in contact with the rotor 101 has a large cross-sectional area, thereby enhancing the corresponding force due to the heat of the bushing 111.

In addition, since the corresponding force by the heat of the bushing 111 is strengthened, the case in which the bushing 111 is melted by the heat of the rotor 101 may not occur.

In addition, since the bushing 111 is not melted, the lower bracket 105 and the lower bearing 103 coupled thereto do not sag in the direction of the rotor 101 while the rotor 101 is constrained.

On the other hand, the buffer member into the insertion groove 113 in the protruding jaw 112 of the bushing 111.

The 121 is coupled to buffer the repeated load generated from the rotor 101.

Then, the rotor by buffering the repetitive load generated in the rotor 101

Even if the bushing 111 that receives the high temperature heat from 101 is melted due to the repeated load, the bushing 111 is not generated.

In the drawings, reference numeral 102 denotes a protrusion.

The present invention has a useful effect of preventing the bushing from being easily melted by the heat generated in the rotor by providing a flat portion at the end of the inclined surface of the bushing so as to widen the cross-sectional area of the bushing end portion so as to strengthen the corresponding force by the heat.

Claims (2)

Heat generated from the rotor melts the bushing coupled to the rotor shaft when driving the motor, and the lower bracket and lower bearing coupled to the rotor deflect in the direction of the rotor, thereby widening the cross-sectional area of the end of the bushing to prevent the rotor from restraining. The bushing structure of the rotor shaft of the fully automatic washing machine characterized by including a flat portion at the inclined end of the bushing to be reinforced. The method of claim 1, In order to reinforce the strength of the bushing and to radiate heat transferred to the bushing to the outside, a plurality of reinforcing ribs are formed on the outer circumferential surface of the bushing so as to function as a propeller while rotating with the rotor. Bushing structure of the rotor shaft of the fully automatic washing machine.