KR200232025Y1 - washer - Google Patents

Abstract

The present invention provides a reduction gear having a sun gear, a plurality of planetary gears that rotate with the sun gear to rotate around the sun gear and rotate integrally with a pulsator, and a ring gear that engages with the planetary gear and rotates integrally with the spin basket. A washing machine having a gear device and a gear casing installed at a lower portion of the reduction gear device, the gear casing being coupled to the ring gear, interposed between the ring gear and the gear casing to engage and engage the ring gear and the gear casing. It characterized in that it comprises a fixed plate. As a result, the sun gear and the planetary gear are not correctly teethed in the reduction gear device due to the misassembly of the ring gear and the gear casing, thereby preventing abnormal noise and damage to the gear generated when the sun gear rotates.

Description

washer

The present invention relates to a washing machine, and more particularly, an abnormality that occurs when the sun gear rotates because the sun gear and the planetary gear are not correctly teethed in the reduction gear device due to the misassembly of the ring gear and the gear casing. It relates to a washing machine that can suppress noise and damage to gears.

Generally, a washing machine has a substantially rectangular casing and a top cover which is coupled to the upper region of the casing.

An outer tub is installed in the casing by a plurality of suspension devices, and a spin basket for storing laundry is rotatably installed in the outer tub. Inside the spin basket, a pulsator is provided for forming washing water flow in the spin basket by forward and reverse rotation.

A drive motor for generating a driving force is provided in the lower region of the outtub, and a shaft assembly for transmitting the driving force of the driving motor to the pulsator and the spin basket is installed.

5 is a cross-sectional view of a shaft assembly of a conventional washing machine. As shown in this figure, the shaft assembly is installed on the drive pulley 125 and the drive pulley 125, and transfers the rotational force of the drive pulley 125 to the spin basket shaft 133 according to the washing or dehydration state. And a clutch device 127 for blocking, a reduction gear device 131 for transmitting the rotational force of the driving pulley 125 to the pulsator shaft 129, and a brake device 123 for controlling the rotation of the spin basket shaft 133. Has

The reduction gear device 131 is coupled to the upper end region of the connecting shaft 135 rotatably coupled with the driving pulley 125 and the sun gear 137 rotates integrally with the connecting shaft 135 and the sun gear. It has a plurality of planetary gears 139 that rotate around the sun gear 137 while engaging itself with (137) and the same axis as the connecting shaft 135, and surrounds the sun gear 137 and the planetary gear 139 Ring gear 141 is formed so as to engage the planetary gear 139 and the carrier 143 is coupled to the axis of the planetary gear 139 to transfer the pivoting movement of the planetary gear 139 to the pulsator shaft 129 Has A gear casing 153 having the same axis as the connecting shaft 135 and formed to surround the connecting shaft 135 is provided below the reduction gear device 131. An oilless bearing 160 supporting the rotation of the connecting shaft 135 is installed between the connecting shaft 135 and the gear casing 153.

The clutch device 127 includes a clutch boss 171 that rotates integrally with the coupling shaft 135 coupled with the driving pulley 125, and a clutch spring that contacts the outer peripheral surfaces of the clutch boss 171 and the gear casing 153 ( 173, a clutch sleeve 175 coupled to the upper and lower ends of the clutch spring 173, and a clutch lever 177 selectively coupled to and separated from the clutch sleeve 175.

The brake device 123 includes a brake drum 145 coupled to the outer circumferential surface of the ring gear 141 and the gear casing 153, a brake band 147 provided to surround the outer circumferential surface of the brake drum 145, and And a brake lever 149 for selectively contacting and releasing the brake band 147 to the outer circumferential surface of the brake drum 145 by a rotational motion, and a brake link 151 for rotating the brake lever 149.

On the other hand, Figure 6 is a perspective view of the assembly of the conventional gear reduction and the gear casing. As shown in this figure, a plurality of protrusions 179 are formed at the upper end of the gear casing 153 at the same radial position with respect to the axis, and these protrusions are formed at the lower end of the ring gear 141 of the reduction gear device 131. The projection receiving groove 181 for receiving the projection 179 to be engaged with the 179 is formed recessed.

However, in such a conventional washing machine, when assembling the gear reduction gear peripherals, the gear reduction gear is inserted into the brake drum, and then the projection of the gear casing is engaged with the projection receiving groove formed in the ring gear, and the lower end of the brake drum is inward. Is curled toward the axis of the connecting shaft and combined with the gear casing. At this time, if the projection of the ring gear and the projection of the gear casing are not properly engaged, the ring gear formed of plastic material may be damaged by the projection of the gear casing, and the gear casing and the ring gear may not have the same axis. The tooth meshing between the sun gear and the planetary gear is not done properly, which causes abnormal noise during rotation and the driving force is not properly transmitted to the pulsator, causing the washing performance to be degraded.

Accordingly, an object of the present invention is to prevent abnormal noise and damage to the gears generated when the sun gear rotates because the sun gear and the planetary gear are not correctly teethed in the reduction gear device due to the misassembly of the ring gear and the gear casing. It is to provide a washing machine that can be suppressed.

1 is a cross-sectional view of a general washing machine.

2 is a cross-sectional view of the shaft assembly of the washing machine according to the present invention.

3 is an assembled perspective view of the peripheral area of the reduction gear device of FIG.

4 is a partially enlarged sectional perspective view of the surrounding area of the reduction gear device of FIG.

5 is a cross-sectional view of a shaft assembly of a conventional washing machine.

6 is an assembled perspective view of the reduction gear device and gear casing of FIG.

* Explanation of symbols for main parts of the drawings

1: casing 7: outtub

9: spin basket 11: pulsator

17: drive motor 21: shaft assembly

23 brake device 27 clutch device

29: pulsator shaft 31: reduction gear device

33: Spin basket shaft 41: Ring gear

53: gear casing 79: gear side projection

80: plate side receiving groove 81: plate side projection

82: gear receiving groove 81: projection receiving groove

83: fixed plate

The object is, according to the present invention, a sun gear, a plurality of planetary gears that rotate around the sun gear in engagement with the sun gear and rotates integrally with the pulsator, and rotates integrally with the spin basket in engagement with the planetary gear A washing machine having a reduction gear device having a ring gear, and a gear casing installed under the reduction gear device and coupled to the ring gear, wherein the ring gear and the gear casing are interposed between the ring gear and the gear casing. It is achieved by a washing machine comprising a fixing plate for engaging the.

Here, any one of the ring gear and the gear casing is formed with a protruding protrusion and the other side corresponding to the protrusion is formed, the fixing plate is engaged with the receiving groove and the receiving portion for receiving the protrusion. It may be desirable to form protrusions.

Hereinafter, with reference to the accompanying drawings will be described in detail for the subject innovation.

1 is a cross-sectional view of a general washing machine, and FIG. 2 is a cross-sectional view of a shaft assembly of a washing machine according to the present invention. As shown in these figures, the washing machine has a substantially rectangular casing 1 and a top cover 3 which is coupled to the upper region of the casing 1.

An outer tub 7 is provided in the casing 1 by a plurality of suspensions 5, and a spin basket 9 for accommodating laundry is rotatably installed in the outer tub 7. The spin basket 9 is provided with a pulsator 11 for forming washing water flow in the spin basket 9 by forward and reverse rotation.

The top cover 3 is provided with a door 13 to access the laundry, and a water supply pipe 15 for supplying the wash water is installed at the rear edge of the door 13.

A drive motor 17 for generating a driving force is provided in the lower region of the outer tub 7, and is connected to the driving motor 17 and the belt 19 to transfer the driving force of the driving motor 17 to the pulsator 11. A shaft assembly 21 for transmitting to the spin basket 9 is provided, and a brake device 23 for controlling the rotation of the spin basket 9 when washing and rinsing is provided.

The shaft assembly 21 is connected to the drive motor 17 by the belt 19 to drive the pulley 25 to receive the driving force, and is installed on the upper side of the driving pulley 25 so as to transfer the driving force in accordance with washing and dehydration. The clutch device 27 for switching, the reduction gear device 31 which transmits the rotational force of the drive pulley 25 to the pulsator shaft 29, and the same axis as the pulsator shaft 29, and has a pulsator shaft ( 29 has a spin basket shaft 33 formed so as to surround 29.

The reduction gear device 31 is coupled to the outer circumferential surface of the coupling shaft 35 coupled with the driving pulley 25 to rotate together with the sun gear 37 and the solar gear 37 that rotate integrally with the coupling shaft 35. While having a plurality of planetary gears (39) that rotates around the sun gear (37), the same axis as the connecting shaft (35), ring gears (41) meshing with the planetary gears (39), each planetary gear (39) And a carrier 43 coupled to the axis of the transmission to transmit the pivoting motion of the planetary gear 39 to the pulsator shaft 29.

The brake device 23 is formed to surround the reduction gear device 31, and has a cylindrical brake drum 45 coupled to the outer circumferential surface of the ring gear 41, and a brake drum 45 on the outer circumferential surface of the brake drum 45. Brake band 47 is installed so as to surround the, and coupled to one side of the brake band 47, the brake lever 49 for contacting and detaching the brake band 47 to the outer peripheral surface of the brake drum 45 by the rotational movement And a brake link 51 for rotating the brake lever 49. The upper region of the brake drum 45 is coupled to the spin basket shaft 33, and the lower region is coupled to the brake drum 45 and installed to surround the connecting shaft 35 with the same axis as the connecting shaft 35. Gear casing 53 is provided. An outer casing 55 is provided in the outer circumferential region of the brake drum 45, and the outer casing 55 has an upper casing 57 and a lower casing 58. An oilless bearing 60 supporting the rotation of the connecting shaft 35 is provided between the connecting shaft 35 and the gear casing 53.

The brake lever 49 has a brake lever shaft 61, which is the center of rotation of the brake lever 49, a brake spring 63 for elastically returning the brake lever 49, and a brake link 51 rotate. In this case, a rotation bolt 65 is provided that comes into contact with one side of the brake link 51. The brake link 51 has a brake link shaft 67, which is the center of rotation of the brake link 51, and a brake link spring 69 for elastically returning the brake link 51. It is installed to surround.

The clutch device 27 is a clutch spring 71 which is integrally rotated with the connecting shaft 35 on the upper side of the driving pulley 25, and a clutch spring installed to surround the outer circumferential surfaces of the clutch boss 71 and the gear casing 53. (73), the clutch sleeve (75) for selectively contacting the clutch spring (73) with the clutch boss (71) and the gear casing (53) in accordance with washing and dehydration, and the brake link (51), combined with washing and dehydration. The clutch lever 77 is in contact with and separated from the clutch sleeve 75.

The clutch spring 73 is formed in a coil shape that is wound upward from the bottom in a belt shape of a metallic material having a predetermined width and upwards. Both ends of the belt are bent to the outside of the clutch spring 73, and these bent ends are inserted into the inner upper and lower regions of the clutch sleeve 75, respectively.

3 is an assembled perspective view of the peripheral area of the reduction gear device of FIG. 2, and FIG. 4 is a partially enlarged sectional perspective view of the peripheral area of the reduction gear device of FIG. As shown in this figure, at the upper end of the gear casing 53, a plurality of gear side protrusions 79 are formed at the same radial position with respect to the axis line, and the reduction gear device so as to correspond to these gear side protrusions 79 ( Receiving groove 81 is formed in the lower surface of the ring gear 41 of the 31. A disk-shaped fixed plate 83 is interposed between the reduction gear device 31 and the gear casing 53. The fixed plate 83 is formed with a shaft hole 85 through which the connecting shaft 35 passes in the center region. In addition, the lower end surface of the fixing plate 83 is engaged with the projection receiving groove 80 for receiving the projections 79 formed on the gear casing 53, the upper end is engaged with the projection receiving groove 81 of the ring gear 41. A plurality of protrusions 79 are formed.

According to the above configuration, when washing and rinsing, the brake band 47 comes into contact with the brake drum 45 to constrain the rotation of the brake drum 45, and the clutch lever 77 has the clutch sleeve 75. In contact with the clutch spring 73 is separated from the clutch boss 71 and in contact with the gear casing 53. When the driving pulley 25 rotates as the driving motor 17 rotates, the sun gear 37 rotates by the rotation of the connecting shaft 35, and the planetary gear 39 engaged with the sun gear 37 rotates. While turning around the sun gear 37. At this time, as the brake drum 45 is constrained and the ring gear 41 is constrained, the rotational speed of the planetary gear 39 is increased by the gear ratio of the ring gear 41 and the sun gear 37. The speed is slower than the rotation speed. In this way, the swing motion of the decelerated planetary gear 39 is transmitted to the pulsator shaft 29 by the carrier 43.

When dehydration, the brake lever 49 is rotated by the rotation of the brake link 51 and the brake drum 47 is free from rotation as the brake band 47 is separated from the outer circumferential surface of the brake drum 45. Lose. In addition, as the brake link 51 rotates, the clutch lever 77 is separated from the clutch sleeve 75 so that the clutch spring 73 contacts the clutch boss 71 and the gear casing 53. When the driving motor 17 rotates and the driving pulley 25 is connected thereto, the clutch boss 71 rotates and the gear casing 53 also rotates by the clutch spring 73. When the gear casing 53 rotates, the rotational force is transmitted to the spin basket shaft 33 through the brake drum 45 so that the spin basket shaft 33 rotates at the same speed as the driving pulley 25. In addition, the rotational force of the drive pulley 25 is transmitted to the reduction gear device 31 through the connecting shaft 35. At this time, in the reduction gear device 31, as the ring gear 41 rotates at the same speed and direction as the connecting shaft 35, deceleration is not performed. As a result, when dewatering, the laundry in the spin basket 9 is dewatered as the pulsator 11 and the spin basket 9 rotate at the same speed and direction.

As such, by providing a fixed plate interposed between the ring gear and the gear casing to engage and engage the ring gear and the gear casing, the gears in the reduction gear unit are not properly teethed due to the misassembly of the ring gear and the gear casing. Abnormal noise and damage to the gears can be suppressed.

As described above, according to the present invention, abnormal noise and gears generated when the sun gear rotates because the sun gear and the planetary gear are not correctly teethed in the reduction gear device due to the misassembly of the ring gear and the gear casing. There is provided a washing machine capable of suppressing damage.

Claims (2)

A reduction gear device having a sun gear, a plurality of planetary gears that rotate around the sun gear in engagement with the sun gear and rotate integrally with a pulsator, and a ring gear that engages with the planetary gear and rotates integrally with the spin basket; A washing machine having a gear casing installed in the lower portion of the reduction gear device and coupled to the ring gear, the washing machine being interposed between the ring gear and the gear casing and including a fixed plate for engaging the ring gear and the gear casing. Washing machine characterized in that. According to claim 1, wherein the gear side projection is formed on one side of the ring gear and the gear casing, the gear side receiving portion is formed on the other side corresponding to the gear side projection, the fixed plate for receiving the gear side projection Washing machine, characterized in that the plate-side projection is formed in engagement with the plate-side receiving groove and the gear-side receiving portion.