KR19990084883A - washer - Google Patents

Abstract

The present invention provides a casing, an outer tub installed in the casing, a drive motor installed in a lower region of the outer tub; A spin basket rotatably installed in the outer tub by a spin basket shaft to accommodate laundry, and a pulsator rotatably installed in the spin basket by a pulsator shaft concentric with the spin basket shaft to form a laundry stream A washing machine having: a connecting shaft coaxially aligned with the pulsator shaft and connected to be electrically coupled via a predetermined power mechanism; A fixed clutch member connecting the connecting shaft and the driving shaft of the driving motor to be integrally rotatable; It is characterized in that it comprises a movable clutch member rotatably integrated with the fixed clutch member in the lowered state is installed rotatably movable along the axial direction and integrally rotatable to the spin basket shaft. As a result, in the conventional washing machine, not only the assembly failure generated when the fixed clutch member is pressed into the drive motor shaft can be suppressed, but also the separation of the fixed clutch member is easily performed when the clutch and the drive motor are to be replaced.

Description

washer

The present invention relates to a washing machine, and more particularly, to prevent assembly failure caused by a fixed clutch member being pushed into a drive motor shaft in a conventional washing machine, and to fix the clutch and the driving motor. It relates to a washing machine to facilitate the separation of the clutch member.

In general, a washing machine is a generally rectangular casing, an outer tub installed by a plurality of suspension devices in a casing, a spin basket rotatably installed in the outer tub to accommodate laundry, and a washing basket installed in the spin basket to generate laundry flow. To have a pulsator.

5 is an enlarged cross-sectional view of an outer tub surrounding area in a washing state of a conventional washing machine, and FIG. 6 is an enlarged cross-sectional view of an outer tub surrounding area in a dehydrated state of a conventional washing machine. As shown in these figures, a drive motor 115 is provided below the outtub 109. Between the outer tub 109 and the drive motor 115, the shaft assembly 117 for transmitting the driving force of the drive motor 115 to the pulsator 113 and the spin basket 111, and when washing and dewatering, The clutch device 119 which controls the direction in which the driving force of the motor 115 is transmitted is provided.

The shaft assembly 117 includes a pulsator shaft 121 for rotating the pulsator 113, a spin basket shaft 123 for rotating the spin basket 111, and rotation of the drive motor 115 when washing. It has a reduction gear device 125 which decelerates a speed and transmits it to the pulsator 113, the outer casing 127 surrounding these, and the brake device 149 which controls rotation of the spin basket 111. The outer casing 127 has an upper casing 131 and a lower casing 133.

The reduction gear device 125 has a connecting shaft 141 coupled to the serration 173 to the driving motor shaft 139 to be rotatable integrally with the driving motor 115, and a sun gear coupled to the connecting shaft 141. 143, a plurality of planetary gears 145 rotated in engagement with the sun gear 143, and a connecting shaft 141, concentric with, and formed to surround the sun gear 143 and the planetary gear 145, planetary gears A ring gear 147 engaged with the 145 and a carrier 146 coupled to the axis of the planetary gear 145 to transmit rotation of the planetary gear 145 to the pulsator shaft 121.

The brake device 149 is installed on the outer circumferential surface of the ring gear 147, and the upper region is installed on the cylindrical brake drum 151 coupled with the spin basket shaft 123, and the brake drum 151 is provided on the outer circumferential surface of the brake drum 151. A brake band 153 for controlling rotation of the 151 and a brake lever 155 coupled to one side of the brake band 153 to contact and detach the brake band 153 from the outer circumferential surface of the brake drum 151 are provided. .

The clutch device 119 is coupled to the lower region of the brake drum 151 and is coupled downwardly along the connecting shaft 141, and the spline 165 is coupled to the outer circumferential surface of the gear casing 164 to form an axis. The upper clutch 167, which is slidable, a clutch guide device 169 for guiding the upper clutch 167 up and down, and a lower clutch 163 that is press-fitted to the drive motor shaft 139 and integrally rotates.

With this configuration, when washing and rinsing, the brake band 153 contacts the outer circumferential surface of the brake drum 151 to restrain the rotation of the brake drum 151, and the upper clutch 167 has the lower clutch 163. Separated from. When the driving motor 115 rotates, the rotational force of the driving motor 115 is decelerated by the reduction gear device 125 and transmitted to the pulsator shaft 121, and the pulsator 113 coupled to the pulsator shaft 121. As the water is rotated, washing water is formed in the spin basket 111, and washing and rinsing are performed.

When dehydration, the brake lever 155 is rotated so that the brake band 153 is separated from the outer circumferential surface of the brake drum 151 so that the rotation of the brake drum 151 is free and at the same time, the upper portion of the brake lever 155 rotates. The clutch 167 moves downward to engage the lower clutch 163. When the driving motor 115 rotates, as the upper clutch 167 engaged with the lower clutch 163 rotates, and the brake drum 151 rotates, the spin basket 111 rotates at the same speed as the driving motor 115. do. In addition, in the reduction gear device 125, the ring gear 147 also rotates by the rotation of the brake drum 151, so that the sun gear 143 and the ring gear 147 rotate in the same speed and in the same direction. 113 rotates at an undecelerated speed and dehydration takes place.

However, in such a conventional washing machine, as the lower clutch is pressed into the drive motor shaft in the conventional washing machine, defects may occur during the assembling process, and when the clutch and the driving motor need to be replaced as time passes, the lower part is press-fitted. Due to the clutch, there is a problem that disassembly is inconvenient.

Accordingly, an object of the present invention is not only to suppress the assembly failure caused by the fixed clutch member is pressed into the drive motor shaft in the conventional washing machine, but also to easily remove the fixed clutch member when replacing the clutch and the drive motor. To provide a washing machine.

1 is a longitudinal sectional view of a typical washing machine,

2 is an enlarged cross-sectional view of a region around a shaft assembly in a washing state of a washing machine according to the present invention;

3 is an enlarged cross-sectional view of a region around the shaft assembly in the dehydrated state of FIG. 2;

4 is an assembled cross-sectional view of the lower clutch peripheral region of FIG.

Figure 4 is an enlarged cross-sectional view of the outer periphery area of the washing state of the conventional washing machine,

Figure 6 is an enlarged cross-sectional view of the peripheral area around the outer tub in the dehydrated state of the conventional washing machine.

* Explanation of symbols for the main parts of the drawings

9: outer tub 11: spin basket

13: pulsator 15: drive motor

17 shaft assembly 21 pulsator shaft

23: spin basket shaft 25: reduction gear device

41: connecting shaft 42: connecting shaft coupling portion

43: sun gear 45: planetary gear

47: ring gear 51: brake drum

53: brake band 55: brake lever

61: fixed screw 63: lower clutch

64: upper shaft coupling portion 65: spline

67: upper clutch 73: serration

According to the present invention, there is provided a casing, an outer tub provided in the casing, and a driving motor provided in a lower region of the outer tub; A spin basket rotatably installed in the outer tub by a spin basket shaft to accommodate laundry, and a pulsator rotatably installed in the spin basket by a pulsator shaft concentric with the spin basket shaft to form a laundry stream A washing machine having: a connecting shaft coaxially aligned with the pulsator shaft and connected to be electrically coupled via a predetermined power mechanism; A fixed clutch member connecting the connecting shaft and the driving shaft of the driving motor to be integrally rotatable; It is achieved by a washing machine, characterized in that it comprises a movable clutch member which is integrally rotatable to the spin basket shaft and movable up and down along the axial direction to engage integrally rotatably with the fixed clutch member in the lowered state.

Here, the connecting shaft may have a connecting shaft coupling portion of the non-circular cross-section at the lower end, and the fixed clutch member may have an upper shaft engaging portion for accommodating the connecting shaft coupling portion in shape, and the connecting shaft coupling portion and It may be effective that the upper shaft fold portion has a rectangular cross section corresponding to each other.

In addition, it may be preferable to further include a fixing screw for screwing the fixed clutch member along the axial direction at the lower end of the connecting shaft, the drive shaft has a drive shaft coupling portion having an internal serration on the upper end, the fixed clutch It may be desirable for the member to have a lower shaft engagement portion having an external serration that is received and engaged with the drive shaft coupling portion.

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

1 is a cross-sectional view of a general washing machine. As shown in this figure, the washing machine has a substantially rectangular casing 1 and a top cover 3 in the upper region of the casing 1. The top cover 3 is provided with a door 5 for taking out the laundry, and a water supply pipe 7 is installed at the rear of the door 5 to supply the washing water. Typically, the water supply pipe 7 is formed in a pair to supply hot water and cold water.

The casing 1 is provided with an outer tub 9 fixed by a plurality of suspension devices. In the outer tub 9, a spin basket 11 for accommodating laundry is rotatably installed, and a pulsator 13 for forming a laundry stream in the spin basket 11 is installed below the spin basket 11. It is.

On the other hand, Figure 2 is an enlarged cross-sectional view of the peripheral area around the shaft assembly in the washing state of the washing machine according to the present invention, Figure 3 is an enlarged cross-sectional view of the peripheral area around the shaft assembly in the dehydrated state of FIG. As shown in these figures, the drive motor 15 is fixedly installed in the lower region of the outtub 9. Between the outer tub 9 and the drive motor 15, a shaft assembly 17 for transmitting the driving force of the drive motor 15 to the pulsator 13 and the spin basket 11 is installed, the shaft assembly 17 In the lower region of the clutch device 19 for switching the driving force transmission direction of the drive motor 15 is installed in accordance with washing and dehydration.

The shaft assembly 17 includes a pulsator shaft 21 coupled to the pulsator 13, a spin basket shaft 23 coupled to the spin basket 11 and surrounding the pulsator shaft 21, and a driving motor. And a reduction gear device 25 for reducing the rotational speed of 15, and an outer casing 27 formed to surround them. A plurality of oilless bearings 29 which support rotation of the pulsator shaft 21 are provided between the spin basket shaft 23 and the pulsator shaft 21.

The reduction gear device 25 has the same axis as the drive motor shaft 39, and is connected to the connecting shaft 41 which rotates integrally with the driving motor 15, and is provided in one region of the connecting shaft 41, thereby connecting the connecting shaft ( 41, a sun gear 43 that rotates integrally with the sun gear 43, a plurality of planetary gears 45 that rotate around the sun gear 43 in engagement with the sun gear 43, and the same axis as the connecting shaft 41, The rotational force of the planetary gear 45 is formed to surround the sun gear 43 and the planetary gear 45 and is coupled to the axis of the planetary gear 45 and the ring gear 47 engaged with the planetary gear 45 at an inner side thereof. It has a carrier 46 for transmitting to the pulsator shaft 21.

A brake device 49 is provided in the outer circumferential region of the reduction gear device 25. Brake device 49 is formed to surround the reduction gear device 25 is coupled to the outer surface of the ring gear 47, the brake drum 51, the upper region is coupled to the spin basket shaft 23, and the brake The brake band 53 is in contact with the outer circumferential surface of the drum 51 to control the rotation of the brake drum 51, and is coupled to one side of the brake band 53 to selectively attach the brake band 53 to the brake drum 51. It has a brake lever 55 for contacting and disengaging. The brake lever 55 is provided with a brake lever shaft 57 for pivoting the brake lever 55, and the brake springs surround the brake lever shaft 57 so that the brake lever 55 can be returned from the pivot position. (59) is provided.

The clutch device 19 is coupled to the lower clutch 63 fastened to the lower end of the connecting shaft 41 by the fixing screw 61 and the lower region of the brake drum 51, and is installed to surround the connecting shaft 41. An upper clutch 67 coupled to the outer circumferential surface of the gear casing 64 and slidable along the axial direction of the connecting shaft 41 and a clutch guide device 69 for guiding the vertical flow of the upper clutch 67. Has In the upper region of the upper clutch 67, a coil spring 71 for elastically supporting the upper clutch 67 in the axial direction is provided.

The outer casing 27 of the shaft assembly 17 has an upper casing 31 and a lower casing 33, and the upper casing 31 has an upper bearing 35 to support rotation of the brake drum 51. In order to support the rotation of the gear casing 64, the lower casing 33 is provided with a lower bearing 37.

4 is an assembled cross-sectional view of the lower clutch peripheral region of FIG. 2. As shown in the figure, a connecting shaft coupling portion 42 is formed at the lower end of the connecting shaft 41, and the upper shaft coupling engaging the connecting shaft coupling portion 42 at the inner upper end of the lower clutch 63. As shown in FIG. The portion 64 is formed. These coupling shaft coupling portions 42 and the upper shaft coupling portions 64 are formed in a rectangular cross-sectional shape so that relative rotation does not occur. In addition, an outer tooth serration 73a is formed at an outer lower end portion of the lower clutch 63, and an inner tooth serration 73b engaged with the upper end of the driving motor shaft 39 is recessed.

According to the above configuration, when washing and rinsing, the brake band 53 is in contact with the outer circumferential surface of the brake drum 51 to restrain the rotation of the brake drum 51, and the upper clutch 67 has a lower clutch ( 63). When the drive motor 15 rotates, the lower clutch 63 coupled to the drive motor shaft 39 rotates, and the rotational force is applied to the connecting shaft 41 engaged with the lower clutch 63 and the fixed screw 61. Is passed. When the connecting shaft 41 rotates, the reduction gear device 25 is constrained by the ring gear 47 coupled with the brake drum 51, so that the planetary gear is controlled by the gear ratio of the sun gear 43 and the ring gear 47. Since the rotational speed of 45 is decelerated and transmitted to the carrier 46, the pulsator shaft 21 coupled to the carrier 46 rotates so that the pulsator 13 in the spin basket 11 causes water flow. Washing and rinsing are done.

At the time of dehydration, the brake lever 55 is rotated so that the brake band 53 is separated from the outer circumferential surface of the brake drum 51 so that the rotation of the brake drum 51 is freed and the upper portion of the brake guide device 69 is moved by the clutch guide device 69. The clutch 67 moves downward to engage with the lower clutch 63. When the driving motor 15 rotates, as the lower clutch 63 rotates integrally and the upper clutch 67 engaged thereto rotates and the brake drum 51 rotates, the spin basket 11 rotates. In addition, the connecting shaft 41 coupled to the lower clutch 63 and the fixing screw 61 rotates, and the ring gear 47 also rotates in the reduction gear device 25 by the rotation of the brake drum 51. As a result, the sun gear 43 and the ring gear 47 do not decelerate as they rotate in the same direction and at the same speed. As such, the pulsator 13 and the spin basket 11 rotate at the same speed and in the same direction, so that dehydration is performed.

As such, the connecting shaft is coaxially aligned with the pulsator shaft and electrically connected to the drive shaft via a predetermined power mechanism, the fixed clutch member interconnects the connecting shaft and the driving shaft of the driving motor to be integrally rotatable, and integrally rotates to the spin basket shaft. At the same time, by providing a movable clutch member which is installed so as to slide up and down along the axial direction so as to be integrally rotatable with the fixed clutch member in the lowered state, the fixed clutch member is generated by pressing the driving clutch shaft in the conventional washing machine. In addition to suppressing assembly failures, it is easy to remove the fixed clutch member when replacing the clutch and the driving motor.

As described above, according to the present invention, it is possible to suppress assembly failure caused by the fixed clutch member being pushed into the drive motor shaft in the conventional washing machine, and also to replace the clutch and the drive motor. A washing machine is provided to facilitate separation.

Claims (5)

A casing, an outer tub installed in the casing, and a driving motor disposed in a lower region of the outer tub; A spin basket rotatably installed in the outer tub by a spin basket shaft to accommodate laundry, and a pulsator rotatably installed in the spin basket by a pulsator shaft concentric with the spin basket shaft to form a laundry stream In the washing machine having a, A connecting shaft coaxially aligned with the pulsator shaft and connected to the pulsator shaft so as to be electrically driven; A fixed clutch member connecting the connecting shaft and the driving shaft of the driving motor to be integrally rotatable; And a movable clutch member which is integrally rotatable to the spin basket shaft and is movable to move up and down along the axial direction so as to be integrally rotatable with the fixed clutch member in the lowered state. The method of claim 1, The connecting shaft has a connecting shaft coupling portion of the non-circular cross-section at the lower end, and the fixed clutch member has an upper shaft engaging portion for accommodating the connecting shaft coupling portion in shape. The method of claim 2, The connecting shaft coupling portion and the upper shaft rim portion washing machine, characterized in that having a cross section corresponding to each other. The method of claim 2, Washing machine characterized in that it further comprises a fixing screw for screwing the fixing clutch member along the axial direction to the lower end of the connecting shaft. The method of claim 1, And the drive shaft has a drive shaft coupling portion having an internal serration on its upper end, and the fixed clutch member has a lower shaft rim portion having an outer tooth serration that is received and engaged with the drive shaft coupling portion.