# US 2021/0277574 A1 · Washing machine

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- Number: US 2021/0277574 A1
- Document ID: US20210277574A1
- Status: Published application
- Kind: A1
- Application number: 17/303,324
- Filed: 2021-05-26
- Published: 2021-09-09
- Earliest claimed: 2016-08-18
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Jeoung Kyo JEOUNG; Doo Young ROU; Yong Jong PARK; Hee Tae LIM; Gyu Dong JEON
- Web page: https://patentgrep.com/patent/US20210277574A1

## CPC

- D06F 37/40: for driving the receptacle and an agitator or impeller, e.g. alternatively {(D06F37/304, D06F37/308 take precedence)}
- D06F 37/04: adapted for rotation or oscillation about a horizontal or inclined axis
- D06F 37/304: {Arrangements or adaptations of electric motors}
- D06F 37/22: in machines with a receptacle rotating or oscillating about a horizontal axis
- D06F: LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES

## Abstract

Disclosed herein is a washing machine. The washing machine includes a main body having a laundry inlet on the front portion, a tub provided inside the main body to store water, a drum rotatably installed inside the tub, a pulsator provided inside the drum and configured to be rotatable with respect to the drum, a first driving motor to provide power to the pulsator, and a second driving motor to provide power to the drum.

## Claims

### Claim 1

A washing machine, comprising:
a main body having a front portion including a laundry inlet;
a tub provided inside the main body to store water;
a drum rotatably installed inside the tub;
a pulsator provided inside the drum and configured to be rotatable with respect to the drum;
a first driving motor to provide power to the pulsator;
a second driving motor to provide power to the drum;
a first shaft extending from the pulsator along a rotation axis of the pulsator;
a first pulley connected to the first shaft;
a first belt connecting the first driving motor and the first pulley;
a second shaft extending from the drum along a rotation axis of the drum;
a second pulley connected to the second shaft; and
a second belt connecting the second driving motor and the second pulley,
wherein a second rotational path of the second belt is located between a first rotational path of the first belt and the tub.

### Claim 2 (depends on 1)

The washing machine of claim 1, wherein the first pulley is different in size from the second pulley.

### Claim 3 (depends on 1)

The washing machine of claim 1, wherein driving force of the first driving motor is different from driving force of the second driving motor.

### Claim 4 (depends on 1)

The washing machine of claim 1, wherein the second driving motor is mounted on a rear surface of the tub and includes an annular stator and a rotor rotating with respect to the annular stator.

### Claim 5 (depends on 4)

The washing machine of claim 4, wherein the first shaft passes through the second driving motor and is rotatable relative to the second driving motor.

### Claim 6 (depends on 4)

The washing machine of claim 4, wherein the first pulley comprises:
a first base portion radially extending from the first shaft at a rear side of the second driving motor,
a first extending portion extending from the first base portion toward the drum, and
a first coupling portion provided at an end portion of the first extending portion and connected to the first belt.

### Claim 7 (depends on 6)

The washing machine claim 6, wherein the first extending portion is provided to be inclined to be closer to the drum near a radially outer side of the first pulley.

### Claim 8 (depends on 1)

The washing machine of claim 1, further comprising:
an idler connected to the first belt,
wherein the first driving motor, the first pulley, and the idler are connected to the first belt, forming the first rotational path.

### Claim 9 (depends on 1)

The washing machine of claim 1, wherein the first pulley comprises:
a first base portion extending at a rear side of the second driving motor in a radial direction of the first pulley, and
a first coupling portion extending from the first base portion toward the drum to cover the second driving motor and to which the first belt is coupled.

### Claim 10 (depends on 1)

The washing machine of claim 1, wherein the first driving motor is configured to selectively rotate the pulsator in one of the same direction as a rotating direction of the drum and the opposite direction of the rotating direction of the drum.

### Claim 11 (depends on 1)

The washing machine of claim 1, wherein the first shaft is rotatably inserted into the second shaft.

### Claim 12 (depends on 1)

The washing machine of claim 1, wherein the first pulley is disposed to be spaced more from the drum than the second pulley is.