Gear reducer, and juicer including same

Patent metadata

Field	Value
Publication number	US-9844303-B2
Application number	US-201414761692-A
Country	US
Kind code	B2
Filing date	Dec 3, 2014
Priority date	Dec 9, 2013
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

A gear reducer and a juicer including the gear reducer are disclosed. The gear reducer transfers rotational force, provided by a drive unit, to a juice extraction screw assembly after gear reduction. The gear reducer includes one or more gear reduction units. At least one of the one or more gear reduction units includes a sun gear coaxially connected to a rotating shaft of the drive unit; a ring gear configured such that a plurality of gear teeth are formed on the inner circumferential surface thereof around the sun gear, and configured to output a rotation speed slower than the rotation speed of the sun gear; and a plurality of planetary gears disposed between the sun gear and the ring gear, and configured to transfer the rotational force of the sun gear to the ring gear.

First claim

The invention claimed is:

1. A gear reducer for a juicer, the gear reducer transferring rotational force, provided by a drive unit, to a juice extraction screw assembly after gear reduction, the gear reducer comprising:
one or more gear reduction units;
wherein at least one of the one or more gear reduction units comprises:
a sun gear coaxially connected to a rotating shaft of the drive unit;
a ring gear configured such that a plurality of gear teeth are formed on an inner circumferential surface thereof around the sun gear, and configured to output a rotation speed slower than a rotation speed of the sun gear; and
a plurality of planetary gears disposed between the sun gear and the ring gear, and configured to transfer the rotational force of the sun gear to the ring gear;
the plurality of planetary gears comprising:
a plurality of inner planetary gears directly engaged with the sun gear; and
a plurality of outer planetary gears engaged between the plurality of inner planetary gears and the ring gear;

the number of the inner planetary gears and the number of the outer planetary gears are each 3×L (where L is a natural number), and
the number of gear teeth of the sun gear is 12×N 1 , the number of gear teeth of the inner planetary gear is 15×N 2 , the number of gear teeth of the outer planetary gear is 15×N 3 , and the number of gear teeth of the ring gear is 60×N 4 (where N 1 , N 2 , N 3 , and N 4 are natural numbers).

2. The gear reducer of claim 1 , wherein the gear reducer is separably installed in the juicer so that the juicer can be selectively used in a low speed mode based on the application of the gear reducer and in a high speed mode based on the separation of the gear reducer.

3. A juicer comprising the gear reducer set forth in claim 1 .

4. A gear reducer for a juicer, the gear reducer transferring rotational force, provided by a drive unit, to a juice extraction screw assembly after gear reduction, the gear reducer comprising:
a primary gear reduction unit configured to primarily gear-reduce the rotational force provided by the drive unit; and
a secondary gear reduction unit configured to secondarily gear-reduce the rotational force provided by the drive unit;
wherein the primary gear reduction unit comprises:
a first sun gear coaxially connected to the rotating shaft of the drive unit;
a first ring gear configured such that a plurality of gear teeth are formed on an inner circumferential surface thereof around the first sun gear, and configured to output a primarily gear-reduced rotation speed slower than a rotation speed of the first sun gear; and
a plurality of first planetary gears disposed between the first sun gear and the first ring gear, and configured to transfer rotational force of the first sun gear to the first ring gear;
the secondary gear reduction unit comprises:
a second sun gear coaxially connected to the rotating shaft of the drive unit;
a second ring gear configured such that a plurality of gear teeth are formed on an inner circumferential surface thereof around the second sun gear, and configured to output a secondarily gear-reduced rotation speed slower than a rotation speed of the second sun gear; and
a plurality of second planetary gears disposed between the second sun gear and the second ring gear, and configured to transfer rotational force of the second sun gear to the second ring gear; and
the plurality of second planetary gears is rotatably mounted on the first ring gear rotating with the primarily gear-reduced rotation speed, and a rotating shaft of the juice extraction screw assembly is connected to a shaft connection hole of the second ring gear rotating with the secondarily gear-reduced rotation speed.

5. The gear reducer of claim 4 , wherein the plurality of second planetary gears comprises:
plurality of inner planetary gears directly engaged with the second sun gear; and
a plurality of outer planetary gears engaged between the plurality of inner planetary gears and the second ring gear.

6. The gear reducer of claim 5 , wherein the number of the inner planetary gears and the number of the outer planetary gears are each 3×L (where L is a natural number).

7. The gear reducer of claim 6 , wherein the number of gear teeth of the second sun gear is 3×M 1 , the number of gear teeth of the inner planetary gears is 3×M 2 , the number of gear teeth of the outer planetary gears is 3×M 3 , and the number of gear teeth of the second ring gear is 3×M 4 (where M 1 , M 2 , M 3 and M 4 are natural numbers).

8. The gear reducer of claim 7 , wherein the number of gear teeth of the second sun gear is 15×N 1 , the number of gear teeth of the inner planetary gear is 15×N 2 , the number of gear teeth of the outer planetary gear is 15×N 3 , and the number of gear teeth of the second ring gear is 60×N 4 (where N 1 , N 2 , N 3 , and N 4 are natural numbers).

9. A juicer comprising the gear reducer set forth in claim 4 .

Assignees

• Coway Co Ltd
• Coway Co Ltd

Inventors

• Jeong Dae Jung
• Chang Min Suk

Classifications

• A47J43/08 Primary

  Driving mechanisms · CPC title

• A47J19/025

  including a pressing screw · CPC title

• F16H1/46 Primary

  Systems consisting of a plurality of gear trains each with orbital gears, {i.e. systems having three or more central gears} · CPC title

• F16H1/32

  in which the central axis of the gearing lies inside the periphery of an orbital gear · CPC title

• F16H1/28 Primary

  with gears having orbital motion · CPC title