KR200198082Y1 - A speed reducer for a washing machine - Google Patents

Abstract

Disclosed is to reduce the driving noise and friction noise by thrust and to double the driving stability by reducing the rotational force of the sun gear fixed to the input shaft through the planetary gears. It relates to a reduction device for a washing machine.

Reduction device for a washing machine according to the present invention is driven by receiving a rotational force from the drive motor, the input shaft fixed to the top gear; An input shaft support plate rotatably supporting the input shaft; At least two planetary gears engaged with the sun gear and rotating to reduce the rotational speed at a predetermined rate; Upper and lower fingerboards rotatably holding and fixing the planetary gears and fixed to the input shaft support plate; A rotary cylinder piece formed on an inner circumferential surface of the ring gear to be engaged with the planetary gears and deceleratingly rotated according to the rotation of the planetary gears; And is coupled to one side portion of the rotating cylinder piece is rotated integrally, it is implemented as an output plate fixed to the output shaft in the center. As a result, the present invention improves the driving stability, as well as the durability thereof, thereby improving washing performance and reducing the trouble of the washing machine, thereby exerting the effect of extending the service life.

Description

Reduction device for a washing machine {A speed reducer for a washing machine}

The present invention relates to a deceleration device for rotating a pulsating plate in a washing tank by decelerating the output of a motor in a washing machine. In particular, an annular rotating cylinder in which a ring gear part is installed inside the ring gear part via planetary gears for rotation force of a sun gear fixed to an input shaft. The present invention relates to a deceleration device for a washing machine, which reduces driving noise and friction noise by thrust while decelerating and doubles driving stability.

In general, the washing machine rotates the pulsating plate to form a pulsating water stream in which the detergent-mixed wash water is pulsated, thereby releasing foreign substances or contaminants adsorbed on the laundry, and the predetermined mode in which the water level and time are preset. Is selected according to the type and amount of laundry, the washing, rinsing, dehydration, etc. are automatically performed. There are various kinds of such washing machines, but it is generally classified into a vortex type washing machine, a drum type washing machine, a stirring type washing machine, etc. according to a washing method, and the most widely used type is a vortex type washing machine.

In the vortex type washing machine, a washing tank is rotatably installed in a storage tank accommodating washing water, and a lower part of the washing tank is rotatably installed at a lower part of the washing tank to generate a strong pulsating water stream such as an up-and-down type, a heart shape, and a rotational direction type. It is. The pulsation plate and the washing tank are combined to be driven by a reduction device mounted on the bottom of the reservoir. The deceleration device is driven by receiving rotational driving force through a power transmission means such as a belt from the drive motor, and decelerates the rotational force of the received driving force and transmits it to the washing tank and the pulsation plate. The washing tank and the pulsating plate rotate left and right by the reduced rotational force to perform the washing stroke. Such a reduction device for a washing machine is bearing-supported and installed in both the upper and lower sides in a pair of upper and lower housings installed at the bottom of a washing tank in a washing machine main body. An example of this is shown in FIG. 1.

Figure 1a is a perspective view showing an example of a conventional speed reducer for a washing machine, Figure 1b is a cross-sectional view of Figure 1a, Figure 1c is a partial detailed cross-sectional view showing in detail only the speed reducer portion, as shown in the conventional speed reduction device ( 100 includes a hollow shaft 112 and a brake drum 114 connected to the upper end of the hollow shaft 112. The ring gear 116 is fixed to the inner circumferential surface of the brake drum 114 and the hollow dewatering shaft 117 is connected to the upper end thereof. In particular, the upper and lower carriers 122 and 124 which are separated up and down are located inside the ring gear 116. A plurality of planetary gears 126 are fixed to the upper and lower carriers 122 and 124 by pivot pins 128. The sun gear 130 is interlocked with the center of the planetary gears 126, and the input shaft 132 passing through the hollow shaft 112 is splined to the sun gear 130 to be rotatable, and the dehydration shaft 117 is connected to the sun gear 130. The lower end of the output shaft 134 passing through the hollow of the spline coupled to the upper carrier 122.

Although not shown in the figure, a pulsation plate is connected to an upper end of the output shaft 134, and a dehydration tank is connected to an upper end of the dehydration shaft 117, respectively. In addition, the outer side of the brake drum 114, the brake band for supporting the rotation of the dehydration tank during washing is installed to selectively operate in accordance with the operation of the brake lever. A belt pulley is mounted on the lower end of the input shaft 132 rotatably inserted in the hollow shaft 112 so as to receive rotational force from the drive motor through the belt, and an operating cam interlocked with the brake lever on the lower end of the hollow shaft 112. By the operation of the clutch spring which selectively transmits power is wound. The planetary gears 126 are coupled in the upper carrier 122 and the lower carrier 124 to transfer the rotational force transmitted from the input shaft 132 to the planetary gears 126 through the upper carrier 122 to the output shaft 134. Consists of.

Therefore, during washing, the actuating cam is operated while the brake drum is stopped by the operation of the brake band to relax the clutch spring, so that the rotational force transmitted from the motor through the belt is transmitted through the input shaft 132 and the sun gear 130. The rotational force transmitted to the gear 126 and the planetary gears 126 is sufficiently decelerated and then transmitted to the output shaft 134 via the upper carrier 122 to rotate the pulsation plate forward / reversely, thereby washing Washing is performed by pulsating the water to form a stream of water.

On the other hand, during dehydration, the rotational force transmitted to the pulley is transmitted to the brake drum 114 via the hollow shaft 112 by clamping the clutch spring by activating the operation cam connected to the brake lever at the same time as the washing machine drainage operation. The dehydration tank connected to the dehydration shaft 117 is rotated at a high speed so that dehydration is performed.

As described above, in order to perform washing, rinsing, and dehydration in the same washing tank in the washing machine, the pulsating plate is rotated at low speed during washing and rinsing, and the dehydrating tank is rotated at high speed during dehydration. In particular, during washing, the rotational force transmitted from the motor is primarily decelerated in the pulley, and the rotational force decelerated in the pulley is secondarily decelerated by the reduction device.

In this conventional washing machine reduction apparatus 100, when the input shaft 132 rotates in conjunction with the driving of the driving motor, the sun gear 130 and the planetary gear 126 rotate at the same time, and then the output shaft 134 rotates. Done. At this time, the sun gear is thrust in the forward rotation due to the decelerated force during washing, and often collides with the bottom part of the upper carrier or escapes from the planetary gear. In addition, during the reverse rotation, the sun gear and the planetary gears moving up and down were shocked by the gap between the gears and the upper and lower carriers. As a result, the sun gears and the planetary gears are burned out, so that durability is reduced, as well as noise is increased and operation is not smoothly performed.

In particular, the conventional reduction gear as described above drives the pulsation plate by decelerating and outputting the rotational force of the input shaft to the upper / lower carrier where the planetary gears are fixed while the planetary gear revolves along the ring gear according to the high speed rotation of the sun gear. As the deceleration output is obtained through incompletely supported planetary gears in the upper and lower carriers, the planetary gear and the sun gear oscillate up and down in the axial direction due to the drive thrust of the sun gear. . As such, the conventional reduction gear is weak in driving stability, and ultimately, washing efficiency is reduced, as well as frequent failures.

Accordingly, an object of the present invention is to solve the above-mentioned drawbacks, the rotational force of the sun gear fixed to the input shaft through the planetary gears to drive by rotating the annular rotary cylinder of the ring gear is installed inside It is to provide a reduction device for a washing machine which reduces friction noise by noise and thrust and doubles driving stability.

1a, 1b and 1c is a view showing an example of a conventional speed reduction device for a washing machine,

2 is an exploded perspective view of the speed reduction device for a washing machine according to the present invention;

3 is a perspective view of the washing machine reduction device according to the present invention,

4 is a front sectional view of FIG. 3 viewed from the A-A direction;

Figure 5 is an enlarged perspective view of a part of the upper and lower fingerboard portion rotatably supporting the planetary gears in the present invention.

* Code descriptions for the main parts of the drawings

210: input shaft 212: sun gear mounting portion

214: screw portion 216: pulley connecting portion

220: input shaft support plate 222: support protrusion

224: plate portion 226: hollow shaft portion

230: Sun gear 232: mounting hole

234: helical gear 236: jaw

240: planetary gear 242: rotation axis

250: lower support plate 252: spacing member

254: support hole 256: rotary shaft support hole

260: upper support plate 262: rotary shaft support hole

264: binding hole 270: rotating cylinder

272: ring gear 274: locking jaw

276: coupling groove 280: output shaft

282: spline mounting portion 290: output plate

292: engaging projection 294: disc shaped portion

296: output shaft coupling hole

Reduction device for a washing machine according to the present invention for achieving the above object is a reduction device for a washing machine for rotating the pulsating plate to reduce the rotational force of the drive motor to form a water flow in the wash water, to transfer the rotational force from the drive motor An input shaft driven by receiving and having a sun gear fixed on the top; An input shaft support plate rotatably supporting the input shaft; At least two planetary gears engaged with the sun gear and rotating to reduce the rotational speed at a predetermined rate; Upper and lower fingerboards rotatably holding and fixing the planetary gears and fixed to the input shaft support plate; A rotary cylinder piece formed on an inner circumferential surface of the ring gear to be engaged with the planetary gears and deceleratingly rotated according to the rotation of the planetary gears; And an output plate coupled to one side portion of the rotary tube piece and rotating integrally with an output shaft fixed to a central portion thereof.

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

2 is an exploded perspective view of the speed reduction device for a washing machine according to the present invention, Figure 3 is a combined perspective view of the speed reduction device for a washing machine according to the present invention. 4 is a front sectional view of FIG. 3 viewed from the A-A direction. Reference will be made in detail to the structure of the present invention while referring to these drawings in parallel.

The reduction gear 200 is classified into an input shaft 210, an input shaft support plate 220 for rotatably supporting the input shaft 210, a sun gear 230 fixed to the input shaft, and a planetary gear meshed with the sun gear 230. (240), the upper and lower fingerboards 250 and 260 supporting the planetary gears 240, the rotary cylinder piece 270 which is provided on the inner circumferential surface with a ring gear portion 272 to be engaged while receiving the planetary gears 240 and Finally, it consists of an output plate 290 for applying the rotational force decelerated output to the rotary cylinder 270 to the output shaft 280 fixed thereto. Now let's take a closer look at these components.

The input shaft support plate 220 has a hollow shaft portion 226 extending from the plate-shaped plate portion 224 of which the support protrusions 222 protrude, and the input shaft 210 penetrates the hollow shaft portion 226 to form a plate portion ( 224 enters the upper side. The upper end portion of the input shaft 210 entered in this way is provided with a sun gear mounting portion 212 formed of a male spline gear, and on the lower portion exposed from the hollow shaft portion 226 of the input shaft support plate 220, a screw portion 214 and a male spline gear are provided. The formed pulley connecting portion 216 is formed. The sun gear 230 is fixed by engaging the mounting hole 232 formed with the arm spline gear on the center of the sun gear mounting portion 212 of the upper end of the input shaft (210). The sun gear 230 has a helical gear part 234 formed on its outer circumferential surface, and a jaw 236 is provided at the lower end side adjacent to the helical gear part 234 due to the thrust of the planetary gears 240 engaged therewith. It will regulate the power to try to exercise downward. This suppresses the thrust trying to move downward of the planetary gears 240, thereby suppressing noise generated by colliding with the lower support plate 250 located below, and preventing burnout.

The planetary gears 240 engaged with and encircling the outer circumferential surface of the sun gear 230 reduce the rotational force of the sun gear 230 at a predetermined ratio. If the planetary gears 240 are two or more, the function can be performed. In the present embodiment, four planetary gear groups are formed to obtain a more stable output. The planetary gears 240 are rotatably fixed to the upper and lower substrates 250 and 260, and the upper and lower substrates 250 and 260 are interposed between the planetary gears 240 by the spacers 252. The planetary gears 240 are rotatably fixed by the rotation shaft 242 while being coupled at a predetermined interval. Of course, both ends of the rotating shaft 242 are fixed to the upper and lower fingerboards 250 and 260. In particular, the upper and lower support plates 250 and 260 are inserted into the support holes 254 bored in the lower support plate 250 so that the support protrusions 222 protruding from the plate portions 224 of the input shaft support plate 220 are inserted therebetween. Unite. Due to this, when the input shaft 210 rotates and the sun gear 230 rotates, the upper and lower substrates 250 and 260 do not rotate, thereby allowing the planetary gears 240 to which they are supported to rotate only. Therefore, it is possible to rotate the rotating cylindrical piece 270 formed around the planetary gears 240 and the ring gear portion 272 is engaged. Detailed description of the upper and lower fingerboards 250 and 260 will be described later with reference to FIG. 5.

The rotating cylinder piece 270 is mounted while surrounding and storing the planetary gears 240. In particular, the rotating cylinder piece 270 is provided with a locking projection 274 protruding inward toward the output direction, the upper support plate 260 described above is mounted from the outside and coupled with the lower support plate 250, thereby The upper and lower support plates 250 and 260 and the rotating cylindrical piece 270 are rotatably coupled to each other by being caught by an outer surface of the locking jaw portion 274. In addition, the upper surface of the planetary gears 240 is restricted to the inner surface of the locking jaw portion 274 to be prevented from swinging. Coupling grooves 276 are also formed in the upper side portion of the rotating cylinder piece 270. As the coupling protrusions 292 of the output plate 290 are inserted into and coupled to the coupling grooves 276, the rotational force of the rotating cylinder piece 270 is transmitted to the output plate 290.

The output plate 290 protrudes the engaging projections 292 inserted into the coupling grooves 276 on the bottom portion of the disc-shaped portion 294, and the output shaft coupling hole 296 formed of an arm spline gear on the center thereof. ) Is formed. The male spline coupling portion 282 of the output shaft 280 is fixed to the output shaft coupling hole 296. Therefore, the rotation of the output plate 290 is the rotation of the output shaft 280 to be able to rotate the pulsating plate (not shown) fixed to the output shaft 280. The above-described support hole 254 and the support protrusion 222, the coupling groove 276 and the coupling protrusion 292 in the present embodiment is formed at equal intervals in the eight embodiments are coupled to each other.

Figure 5 is a partially enlarged perspective view of the upper and lower support portion to rotatably support the planetary gear in the present invention, as shown, the lower support plate 250 and the upper support plate 260 is supported by interposing four planetary gears 240 between In order to space the distance slightly larger than the width of the planetary gear 240 is interposed four spacer members 252, in this embodiment fixed one end of the spacer member 252 to the lower support plate 250 Four planetary gears 240 are supported by the rotation shaft 242 in a state of being made to be fixed by inserting one end of the rotation shaft 242 into the rotation shaft support hole 256 of the lower support plate 250, and mounting the upper support plate 260. By fixing the other end of the rotation shaft 242 to the rotary shaft support hole 262 formed in the upper support plate 260 to support the planetary gears 240 to the upper / lower support plates (250,260) rotatably. At this time, the end of the spacer member 252 fixed to the lower support plate 250 is inserted into the binding hole 264 of the upper support plate 260, in this state by pressing the end of the spacer member 252 to the upper completely It is fixed to the support plate 260. As a result, the upper and lower fingerboards 250 and 260 are bound to be spaced apart by a predetermined interval by the spacer 252 to support and protect the planetary gears 240 therein on the rotation shaft 242.

Now, the operation of the present invention will be described in detail with reference to the above-described drawings.

When the driving motor is not shown, the input shaft 210 is rotated through the belt and the belt pulley. Then, the sun gear 230 fixed to the upper end of the input shaft 210 is rotated integrally, and the sun gear 230 rotates the planetary gears 240 engaged therewith. Since the planetary gears 240 are fixed to the upper and lower fingerboards 250 and 260, the planetary gears 240 do not rotate and only rotate. Thereby, the rotating cylinder piece 272 in which the ring gear part 272 meshed with it is made to rotate. At this time, the input rotational speed is decelerated according to the reduction ratio between the sun gear 230, the planetary gear 240, and the ring gear portion 272, so that the rotating cylinder 272 is decelerated rotation. The rotating cylinder piece 270 which is decelerated and rotated in this way rotates the output plate 290 coupled thereto, thereby causing the output shaft 280 spline-coupled to the output plate 290 to rotate while being fixed to the pulsating plate ( Not shown). Therefore, while the pulsating plate in the washing tank is finally rotated to form a water flow in the washing water mixed with detergent to wash the laundry.

In particular, the sun gear 230 and the planetary gear 240 that rotates at a high speed during driving is the thrust is generated to swing in the vertical direction, in the present invention by forming a jaw 236 in the lower portion of the sun gear 230 to form a planetary gear Suppression of the shaking due to the downward thrust of the 240, and the planetary gear 240, the upper surface of the locking jaw 274 of the rotary cylinder 270 is restrained by the thrust restrained the thrust gear 230 And the planetary gears 240 are blocked up and down by the thrust of the source at the source. Therefore, not only can the risk of damage due to collision with adjacent components caused by the up-and-down fluctuation caused by thrust be eliminated, but also the noise is drastically reduced.

As described above, the speed reduction device for a washing machine according to the present invention reduces the rotational force of the sun gear fixed to the input shaft through the planetary gears to decelerate and rotate the annular rotary cylinder in which the ring gear is installed inside, thereby reducing drive noise and thrust. It has the advantage of reducing the frictional noise and doubling the driving stability. As such, the device is improved in driving stability, and thus, its durability is improved. As a result, the washing performance is improved and the life of the washing machine is reduced by reducing the trouble of the washing machine.

Claims (4)

In the deceleration device for a washing machine for rotating the pulsating plate to reduce the rotational force of the drive motor to form a water flow in the wash water, An input shaft driven by receiving rotational force from the driving motor and having a sun gear fixed thereto; An input shaft support plate rotatably supporting the input shaft; At least two planetary gears engaged with the sun gear and rotating to reduce the rotational speed at a predetermined rate; Upper and lower fingerboards rotatably holding and fixing the planetary gears and fixed to the input shaft support plate; A rotary cylinder piece formed on an inner circumferential surface of the ring gear to be engaged with the planetary gears and deceleratingly rotated according to the rotation of the planetary gears; And Reduction device for a washing machine including an output plate is coupled to one side portion of the rotating cylinder piece is rotated integrally, the output shaft is fixed to the center thereof. The reduction gear for washing machine according to claim 1, wherein the planetary gears are engaged with each other at equal intervals while traveling around the outer circumferential surface of the sun gear. The reduction gear for a washing machine according to claim 1, wherein the sun gear has a jaw below the outer circumferential surface and restricts a lower surface of the planetary gear so that the planetary gear cannot swing downward. According to claim 1 or claim 3, wherein the rotating cylinder piece has a locking projection protruding inward on the upper support plate side, the outer surface supports the upper support plate while the inner surface is the upper surface of the planetary gears Reduction device for a washing machine characterized in that it is regulated so as not to swing.