KR19990041017U - Shaft Assembly for Washing Machine - Google Patents

Abstract

The present invention includes a reduction gear unit having a sun gear, a planetary gear for engaging the sun gear and revolving around the sun gear to rotate a pulsator, and a ring gear for engaging the planetary gear and rotating the spin basket; A rotating shaft which transmits a driving force of a driving motor to the planetary gear through the sun gear; A drive assembly groove disposed below the reduction gear part and related to a shaft assembly of a washing machine for transmitting a driving force of the drive motor to the ring gear, the drive coupling groove recessed at a predetermined interval on an upper surface of the gear casing; A plurality of driven coupling grooves recessed in the lower surface of the ring gear to correspond to the driving coupling grooves; One end is fixed to the drive coupling groove and the other end is fixed to the driven coupling groove, characterized in that it comprises a plurality of fixing pins for coupling the gear casing and the ring gear integrally rotatable. 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 suppressing abnormal noise and damage to the gear generated when the sun gear rotates.

Description

Shaft Assembly for Washing Machine

The present invention relates to a washing machine, and more particularly, abnormal noise 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 incorrect assembly of the ring gear and the gear casing. And it relates to a shaft assembly for a washing machine to suppress the damage of the gear.

In general, a washing machine for washing laundry by washing water generated by a pulsator has an almost rectangular casing and a top cover provided in an upper region of the casing. The top cover is provided with a door for access to the laundry, and a water supply pipe for supplying the washing water is installed at the rear edge of the door. Water pipes are usually installed in pairs to supply cold and hot water.

An outer tub is provided in the casing by a plurality of suspension devices, and a spin basket for accommodating laundry is rotatably installed in the outer tub. In the spin basket, a pulsator is formed to form a washing stream. The lower area of the outer tub is provided with a drive motor for generating a driving force, and a shaft assembly for transmitting the driving force of the drive motor to the pulsator and the spin basket.

4 is a cross-sectional view of a shaft assembly of a conventional washing machine, and FIG. 5 is an assembled perspective view of the gear reduction and the gear casing of FIG. 4. As shown in these figures, the shaft assembly 119 is connected to the drive motor (not shown) and the belt is connected to the drive pulley 123 to receive the driving force, the drive pulley 123 is installed in accordance with the washing and dehydration It is installed on the clutch device 125 and the clutch device 125 to switch the transmission direction of the driving force, and when washing and rinsing, the rotational force of the drive pulley 123 is decelerated and transmitted to the pulsator shaft 127. A reduction gear device 129 and a spin basket shaft 153 having the same axis as the pulsator shaft 127 and formed to surround the pulsator shaft 127.

The reduction gear device 129 is coupled to the outer circumferential surface of the coupling shaft 135 coupled with the driving pulley 123 and rotates in conjunction with the sun gear 137 and the solar gear 137 that rotate integrally with the coupling shaft 135. While having a plurality of planetary gear 139 to rotate around the sun gear (137), the connecting shaft 135 and the same axis, the planetary gear 139 and the ring gear (141), each planetary gear (139) And a carrier 143 coupled to the axis of the transmission to transmit the pivoting motion of the planetary gear 139 to the pulsator shaft 127.

The brake device 131 is formed to surround the reduction gear device 129, and has a cylindrical brake drum 145 coupled to the outer circumferential surface of the ring gear 141, and a brake drum 145 on the outer circumferential surface of the brake drum 145. Brake band 147 is installed to surround the and the brake band 147 is coupled to one side of the brake band 147, the brake lever 149 for contacting and detaching the brake band 147 to the outer peripheral surface of the brake drum 145 by the rotational movement And a brake link 151 for rotating the brake lever 149. The upper region of the brake drum 145 is coupled to the spin basket shaft 153, and the lower region is coupled to the brake drum 145 and installed to surround the connecting shaft 135 with the same axis as the connecting shaft 135. Gear casing 155 is provided.

In the brake lever 149, the brake lever shaft 157, which is the center of the rotation of the brake lever 149, the brake spring 159 for elastically returning the brake lever 149, and the brake link 151 rotate. When the control bolt 165 is in contact with one side of the brake link 151 is installed. The brake link 151 has a brake link shaft 161 which is the center of rotation of the brake link 151 and a brake link spring 163 which elastically returns the brake link 151 to the brake link shaft 161. It is installed to surround.

The clutch device 125 is coupled to surround the connecting shaft 135 on the upper side of the driving pulley 123, the clutch boss 167 that rotates integrally with the connecting shaft 135, the clutch boss 167 and the gear casing ( A clutch spring 169 provided to cover the outer circumferential surface of the 155, a clutch sleeve 171 for selectively contacting the clutch spring 169 with the clutch boss 167 and the gear casing 155 according to washing and dehydration, and a brake It is coupled to the link 151 has a clutch lever 173 in contact with and separated from the clutch sleeve 171 in accordance with washing and dehydration.

Meanwhile, a plurality of protrusions 180 are formed on the upper surface of the gear casing 155 at the same radius with respect to the axis, and the lower portion of the ring gear 141 of the reduction gear device 129 in contact with the gear casing 155. The surface is provided with a receiving groove 183 for receiving the protrusion 180.

By the above configuration, when washing and rinsing, the brake band 147 is in contact with the brake drum 145 to constrain the rotation of the brake drum 145, and the clutch lever 173 is the clutch sleeve 171. In contact with the clutch spring 169 is separated from the clutch boss 167 and contacted to the gear casing 155. When the drive motor rotates, the drive pulley 123 connected by the drive motor and the belt rotates. As the driving pulley 123 rotates, the coupling shaft 135 coupled thereto rotates, and the sun gear 137 rotates. As the planetary gear 139 meshed with the sun gear 137 rotates, the sun gear 137 rotates. Turn around. At this time, as the brake drum 145 is constrained and the ring gear 141 is constrained, the rotational speed of the planetary gear 139 is controlled by the gear ratio of the ring gear 141 and the sun gear 137. The speed is slower than the rotation speed. As such, the rotational movement of the reduced planetary gear 139 is transmitted to the pulsator shaft 127 by the carrier 143 to rotate the pulsator 115 and wash and rinse.

When dehydration, the brake lever 149 is rotated by the rotation of the brake link 151, and the brake drum 145 is free from rotation as the brake band 147 is separated from the outer circumferential surface of the brake drum 145. Lose. In addition, as the brake link 151 rotates, the clutch lever 173 is separated from the clutch sleeve 171 so that the clutch spring 169 contacts the clutch boss 167 and the gear casing 155. When the driving motor rotates and the driving pulley 123 connected thereto, the clutch boss 167 rotates and the gear casing 155 also rotates by the clutch spring 171. When the gear casing 155 rotates, the rotational force is transmitted to the spin basket shaft 153 through the brake drum 145 so that the spin basket shaft 153 rotates at the same speed as the driving pulley 123. In addition, the rotational force of the driving pulley 123 is transmitted to the reduction gear device 129 through the connecting shaft 135. At this time, in the reduction gear device 129, as the brake drum 145 rotates at the same speed and direction as the connecting shaft 135, deceleration is not performed. As a result, during the dehydration, the pulsator 115 and the spin basket 113 rotate in the same speed and direction as the driving pulley 123, and dehydration is performed.

By the way, in such a conventional washing machine, when 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 Since the teeth do not have the same axis, the tooth meshing between the sun gear and the planetary gear is not properly made, resulting in 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 suppress abnormal noise and damage to the gear caused 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. To provide a washing machine shaft assembly,

1 is a cross-sectional view of a typical 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 gear reduction and the gear casing of FIG.

4 is a cross-sectional view of a shaft assembly of a conventional washing machine,

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

* Explanation of symbols for the main parts of the drawings

1: casing 11: outer tub

13: spin basket 15: pulsator

17: drive motor 19: shaft assembly

25: clutch device 27: pulsator shaft

29: reduction gear device 31: brake device

37: sun gear 39: planetary gear

41: ring gear 43: carrier

53: spin basket shaft 55: gear casing

75: pin receiving groove 77: fixed pin

The object is, according to the present invention, a reduction gear unit having a sun gear, a planetary gear that meshes with the sun gear and revolves around the sun gear and rotates a pulsator, and a ring gear that engages the planetary gear and rotates the spin basket. Wow; A rotating shaft which transmits a driving force of a driving motor to the planetary gear through the sun gear; In the shaft assembly of the washing machine, the gear casing disposed under the reduction gear part to transmit the driving force of the driving motor to the ring gear, the driving coupling groove recessed at a predetermined interval on the upper surface of the gear casing; A plurality of driven coupling grooves recessed in the lower surface of the ring gear to correspond to the driving coupling grooves; A shaft assembly of a washing machine, one end of which is fixed to the drive coupling groove and the other end of which is fixed to the driven coupling groove, the plurality of fixing pins coupling the gear casing and the ring gear to be rotatable integrally. Is achieved.

Here, the drive coupling groove may be preferably disposed at an equiangular interval along the circumferential direction on the upper surface of the gear casing, protruding from one side of the upper surface of the gear casing and the lower surface of the ring gear. At least one pair of fixing protrusions; It may be desirable to further include a receiving groove for fixing the fixing projections on the other side.

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. As shown in this figure, the washing machine has a substantially rectangular casing 1 and a top cover 3 provided in the upper region of the casing 1. The top cover 3 is provided with a door 5 for access to laundry, and a water supply pipe 7 for supplying wash water is installed at the rear edge of the door 5. The water supply pipe 7 is usually installed in pairs to supply cold water and hot water.

An outer tub 11 is provided in the casing 7 by a plurality of suspension devices 9, and a spin basket 13 for accommodating laundry is rotatably installed in the outer tub 11. In the spin basket 13, a pulsator 15 for forming a stream of laundry is provided. In the lower region of the outer tub 11, a drive motor 17 for generating a driving force and a shaft assembly 19 for transmitting the driving force of the drive motor 17 to the pulsator 15 and the spin basket 13 are provided. have.

Figure 2 is a cross-sectional view of the shaft assembly of the washing machine according to the present invention, Figure 3 is an assembled perspective view of the gear reduction and gear casing of Figure 2; The shaft assembly 19 of the washing machine according to the present invention is connected to the drive motor 17 and the belt 21 installed on the lower surface of the outer tub 11, like the shaft assembly of the conventional washing machine, so that the drive motor 17 A driving pulley 23 for transmitting a driving force, a clutch device 25 positioned above the driving pulley 23 to selectively transmit and block a driving force of the driving pulley 23 to the spin basket 13, and a driving pulley A reduction gear device 29 for transmitting the rotational force of 23 to the pulsator shaft 27 and a brake device 31 for controlling the rotation of the spin basket 13 are provided.

The reduction gear device 29 is connected to the upper end region of the coupling shaft 35 coupled to the driving pulley 23 by a nut 33 and is rotatable integrally with the coupling shaft 35. When the gear 37 rotates, it has a plurality of planetary gears 39 that rotate around the sun gear 37 while being engaged with the sun gear 37 and have the same axis as the connecting shaft 35, and the sun gear 37 ) Is formed to surround the planetary gear 39 and the ring gear 41 engaged with the planetary gear 39 and coupled to the axis of the planetary gear 39 to rotate the planetary gear 39 in the pulsator shaft 27. ) Has a carrier 43 for delivery.

The brake device 31 is coupled to the brake drum 45 formed to surround the reduction gear device 29, the brake band 47 installed to surround the outer circumferential surface of the brake drum 45, and one side of the brake band 47. And a brake lever 49 for contacting and detaching the brake band 47 to the outer circumferential surface of the brake drum 45 by a rotational motion, and a brake link 51 for pivoting the brake lever 49.

The upper portion of the brake drum 45 is coupled to the spin basket shaft 53, the lower region is coupled to the gear casing 55 is installed to surround the connecting shaft 35 with the same axis as the connecting shaft 35 is coupled have.

The brake lever 49 is provided with a brake lever shaft 57 which is the center of the brake lever 49 rotational movement. A brake spring 59 for elastically returning the brake lever 49 is provided on the brake lever shaft 57. ) Is installed to surround.

The brake link shaft 61, which is the center of the brake link 51 rotational movement, is also provided in the brake link 51 for rotating the brake lever 49. The brake link spring for elastically returning the brake link 51 is provided. 63 is provided so as to surround the brake link shaft 61. In addition, in order to adjust the rotation range of the brake lever 49 by the rotation of the brake link 51, the adjustment lever 65 is installed on the brake lever 49, the end of the adjustment bolt 65 is the brake link ( When the 51 rotates, it comes into contact with one side of the brake link 51.

Clutch device 25 is installed on the lower side of the reduction gear device 29, the coupling shaft 35 is coupled to the central region, the clutch boss 67 and integrally rotates with the coupling shaft 35, the gear casing 55 And a clutch spring 69 provided at an outer circumferential region of the clutch boss 67, a clutch sleeve 71 formed to surround the clutch spring 69, and one side thereof is engaged with the brake link 51 to provide a brake link 51. ), The clutch lever 73 is brought into contact with and disengaged from the clutch sleeve 71 according to the rotation of the.

The clutch spring 69 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 69, and these bent ends are inserted into the inner upper and lower regions of the clutch sleeve 71, respectively.

On the other hand, the upper end of the gear casing 55 is formed with a plurality of pin receiving grooves 75 recessed in the same radius with respect to the axis, the lower surface of the ring gear 41 in contact with the upper end of the gear casing 55 The pin receiving groove 75 facing the pin housing groove 75 formed in the gear casing 55 is recessed. The pin receiving groove 75 has a fixing pin 77 is inserted to couple the gear casing 55 and the ring gear 41.

With this configuration, when washing and rinsing, the brake band 47 is in contact with the brake drum 45 to restrain the brake drum 45, and the clutch lever 73 is in contact with the clutch sleeve 71. The clutch spring 69 is in contact with the outer circumferential surface of the gear casing 55 and is disengaged from the outer circumferential surface of the clutch boss 67. When the drive motor 17 rotates, the connecting shaft 35 rotates as the drive pulley 23 connected to the belt 21 rotates by the rotation of the drive motor 17. When the connecting shaft 35 rotates, the sun gear 37 rotates, and the planetary gear 39 pivots around the sun gear 37 by the rotation of the sun gear 37. At this time, as the gear casing 55 is restrained by the clutch spring 69 and the ring gear 41 coupled with the gear casing 55 is also restrained, the planetary gears 55 are planetary by the gear ratio of the ring gear 41 and the sun gear 37. The revolution speed of the gear 39 is decelerated. In this way, the speed of rotation of the reduced planetary gear 39 is transmitted to the pulsator shaft 27 through the carrier 43 to rotate the pulsator 15. Washing water is formed by the rotation of the pulsator 15 installed in the spin basket 13, and washing is performed.

At the time of dehydration, the brake lever 49 is rotated by the rotation of the brake link 51 so that the brake band 47 is separated from the outer circumferential surface of the brake drum 45, and the clutch lever 73 is also the clutch sleeve 71. The clutch spring 69 is brought into contact with the outer circumferential surface of the clutch boss 67 and the outer circumferential surface of the gear casing 55. When the driving motor 17 rotates, the connecting shaft 35 rotates as the driving pulley 23 connected to the driving motor 17 and the belt 21 rotates. The rotation of the clutch boss 67 by the rotation of the connecting shaft 35 is transmitted to the gear casing 55 because the clutch spring 69 is in contact with the outer circumferential surface of the clutch boss 67. The rotation of the gear casing 55 is transmitted to the spin basket shaft 53 through the brake drum 45 so that the spin basket 13 rotates. In addition, the rotation of the coupling shaft 35 also causes the rotation of the various gears in the reduction gear device 29. As the gear casing 55 and the brake drum 45 rotate, the ring gear 41 also rotates, eventually. The ring gear 41 and the sun gear 37 rotate in the same speed and direction so that deceleration is not achieved. The rotational movement of the planetary gear 39, which is not decelerated, is transmitted to the pulsator shaft 27 through the carrier 43, so that the pulsator 15 rotates. In this way, the pulsator 15 and the spin basket 13 are rotated at the same speed and direction while dehydrating the laundry.

In this way, the drive coupling groove recessed at a predetermined interval on the upper surface of the gear casing, the plurality of driven coupling grooves recessed corresponding to the driving coupling groove on the lower surface of the ring gear, one end is fixed to the drive coupling groove and the other end is By providing a plurality of fixing pins fixed in the driven coupling groove to integrally rotate the gear casing and the ring gear, the sun gear and the planetary gear are correctly toothed in the reduction gear device due to the misassembly of the ring gear and the gear casing. Since it is not bite, it can suppress abnormal noise and damage of gear that occurs when the sun gear rotates.

As described above, according to the present invention, due to the misassembly of the ring gear and the gear casing, the 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. A shaft assembly for a washing machine is provided that can suppress damage.

Claims (3)

A reduction gear unit having a sun gear, a planetary gear meshing with the sun gear to revolve around the sun gear and rotating a pulsator, and a ring gear meshing with the planetary gear to rotate the spin basket; A rotating shaft which transmits a driving force of a driving motor to the planetary gear through the sun gear; In the shaft assembly of the washing machine is disposed in the lower gear unit gear casing for transmitting the driving force of the drive motor to the ring gear, A driving coupling groove recessed at a predetermined interval on an upper surface of the gear casing; A plurality of driven coupling grooves recessed in the lower surface of the ring gear to correspond to the driving coupling grooves; And a plurality of fixing pins, one end of which is fixed to the drive coupling groove and the other end of which is fixed to the driven coupling groove, integrally rotatably coupling the gear casing and the ring gear. The method of claim 1, The drive coupling groove is a shaft assembly of the washing machine, characterized in that arranged on the upper surface of the gear casing with an even interval along the circumferential direction. The method of claim 2, At least one pair of fixing protrusions protruding from one side of an upper surface of the gear casing and a lower surface of the ring gear; Shaft assembly of the washing machine characterized in that it further comprises a receiving groove for fixing the fixing projection on the other side.