Drum washing machine

Abstract

A drum washing machine, which decelerates rotation of a driving motor through a planetary gear mechanism and transfers the rotation to the drum, so that the drum and a rotating body with a projection rotate at different rotating speeds. The planetary gear mechanism includes a sun gear, an internal gear, a plurality of planetary gears, planetary gear carrier. The planetary gear carrier has a rear planetary carrier and a front planetary carrier, through which the planetary gears are clamped from both sides thereof, supporting shafts erected between the front and the rear planetary carrier, the planetary gears are rotatably provided on the supporting shafts. Base ends of the supporting shafts are fixed on the rear planetary carrier before the planetary gears being provided on the supporting shafts The front planetary carrier is fixed at front ends of the supporting shafts provided with the planetary gears.

1 . A drum washing machine, comprising:
 an outer tank arranged in a housing;   a drum, which is arranged in the outer tank and capable of rotating about a horizontal axis or an inclination axis inclining relative to a horizontal direction;   a rotating body arranged at a rear part of the drum, a surface of the rotating body being provided with a projection; and   a driving part comprising a driving motor and a planetary gear mechanism, wherein rotation of the driving motor is transferred to the drum after being decelerated through the planetary gear mechanism, so that the drum and the rotating body are enable to rotate at different rotating speeds;   wherein the planetary gear mechanism comprises:
 a sun gear; 
 an annular internal gear surrounding the sun gear; 
 a plurality of planetary gears interposed between the sun gear and the internal gear; and 
 a planetary gear carrier through which the planetary gears are rotatably held; 
   wherein the planetary gear carrier comprises: a first planetary carrier and a second planetary carrier, wherein the plurality of planetary gears are clamped by the first planetary carrier and the second planetary carrier from both sides of the planetary gears; and supporting shafts erected between the first planetary carrier and the second planetary carrier, wherein the planetary gears are rotatably provided on the supporting shafts;   wherein base ends of the supporting shafts are fixed to the first planetary carrier before the planetary gears being provided on the supporting shafts; and   the second planetary carrier is fixed to front ends of the supporting shafts provided with the planetary gears.   
     
     
         2 . The drum washing machine according to  claim 1 , wherein
 the second planetary carrier has inserting holes into which the front ends of the supporting shafts are inserted; and   the second planetary carrier is fixed at the front ends of the supporting shafts by riveting the front ends of the supporting shafts penetrating through the inserting holes.   
     
     
         3 . The drum washing machine according to  claim 2 , further comprising:
 a stress part interposed between the first planetary carrier and the second planetary carrier, wherein the stress part is configured to bear force applied to the first planetary carrier together with the supporting shafts when the front ends of the supporting shafts are stressed by riveting.   
     
     
         4 . The drum washing machine according to  claim 1 , wherein
 the second planetary carrier has inserting holes into which screws are inserted; and   the second planetary carrier is fixed at the front ends of the supporting shafts by fixing the screws penetrating through the inserting holes to the front ends of the supporting shafts.   
     
     
         5 . The drum washing machine according to  claim 1 , wherein
 the internal gear is fixed to a rotating shaft of the drum; and   in the planetary gear mechanism, a total number of transfer paths for transferring a torque from the sun gear to the internal gear through the planetary gears is set to be any number selected from three to five.   
     
     
         6 . The drum washing machine according to  claim 2 , wherein
 the internal gear is fixed to a rotating shaft of the drum; and   in the planetary gear mechanism, a total number of transfer paths for transferring a torque from the sun gear to the internal gear through the planetary gears is set to be any number selected from three to five.   
     
     
         7 . The drum washing machine according to  claim 3 , wherein
 the internal gear is fixed to a rotating shaft of the drum; and   in the planetary gear mechanism, a total number of transfer paths for transferring a torque from the sun gear to the internal gear through the planetary gears is set to be any number selected from three to five.   
     
     
         8 . The drum washing machine according to  claim 4 , wherein
 the internal gear is fixed to a rotating shaft of the drum; and   in the planetary gear mechanism, a total number of transfer paths for transferring a torque from the sun gear to the internal gear through the planetary gears is set to be any number selected from three to five.   
     
     
         9 . A drum washing machine, comprising:
 an outer tank arranged in a housing;   a drum, which is arranged in the outer tank and capable of rotating about a horizontal axis or an inclination axis inclining relative to a horizontal direction;   a rotating body arranged at a rear part of the drum, a surface of the rotating body being provided with a projection; and   a driving part comprising a driving motor and a planetary gear mechanism, wherein rotation of the driving motor is transferred to the drum after being decelerated through the planetary gear mechanism, so that the drum and the rotating body are enable to rotate at different rotating speeds;   wherein the planetary gear mechanism comprises:
 a sun gear; 
 an annular internal gear surrounding the sun gear; 
 a plurality of planetary gears interposed between the sun gear and the internal gear; and 
 a planetary gear carrier through which the planetary gears are rotatably held; 
   wherein the planetary gear carrier comprises: a first planetary carrier and a second planetary carrier, wherein the plurality of planetary gears are clamped by the first planetary carrier and the second planetary carrier from both sides of the planetary gears; and supporting shafts erected between the first planetary carrier and the second planetary carrier, wherein the planetary gears are rotatably provided on the supporting shafts;   wherein the supporting shafts are integrally formed with the first planetary carrier; and   the second planetary carrier is fixed to front ends of the supporting shafts provided with the planetary gears.   
     
     
         10 . The drum washing machine according to  claim 9 , wherein
 the second planetary carrier has inserting holes into which the front ends of the supporting shafts are inserted; and   the second planetary carrier is fixed at the front ends of the supporting shafts by riveting the front ends of the supporting shafts penetrating through the inserting holes.   
     
     
         11 . The drum washing machine according to  claim 10 , further comprising:
 a stress part interposed between the first planetary carrier and the second planetary carrier, wherein the stress part is configured to bear force applied to the first planetary carrier together with the supporting shafts when the front ends of the supporting shafts are stressed by riveting.   
     
     
         12 . The drum washing machine according to  claim 9 , wherein
 the second planetary carrier has inserting holes into which screws are inserted; and   the second planetary carrier is fixed at the front ends of the supporting shafts by fixing the screws penetrating through the inserting holes to the front ends of the supporting shafts.   
     
     
         13 . The drum washing machine according to  claim 9 , wherein
 the internal gear is fixed to a rotating shaft of the drum; and   in the planetary gear mechanism, a total number of transfer paths for transferring a torque from the sun gear to the internal gear through the planetary gears is set to be any number selected from three to five.