Washing machine transmission

A washing machine transmission comprising:

• a housing mounted on a lower portion of an outer tub;
• a brake drum extending through a lower surface of the housing and supported by the housing;
• a spin tub shaft which is connected to the spin tub at an upper portion of the spin tub shaft and is screwed to an upper portion of the brake drum at a lower portion of the spin tub shaft, for rotating a spin tub in a first direction;
• a driving shaft which extends through the brake drum, is coupled with a belt pulley at a lower end of the driving shaft, and rotates in the first direction for having a power transmitted from a driving source;
• a driven shaft which extends through the spin tub shaft and is coupled with a pulsator at an upper end of the driven shaft, for rotating the pulsator in forward and reverse directions;
• a clutch spring for connecting said driving shaft with said brake drum so that the power is transmitted to said brake drum;
• and
• a power transmitting means for connecting the driving shaft and the driven shaft, for transmitting a rotation of the driving shaft, which rotates in the first direction to the driven shaft, and for rotating the driven shaft in the forward and reverse directions, wherein the power transmitting means comprises a first link which is attached at a first end to an upper end of the driving shaft, for rotating with the driving shaft, a second link which is hinged to an inner peripheral surface of the brake drum at a first end of the second link and is connected to said first link, for rotating in forward and reverse directions in a predetermined range of angles according to a rotation of said first link, and a third link which is attached to the driven shaft at a first end of said third link and is coupled with said second link at a second end of said third link, for rotating in the forward and reverse directions.

A washing machine transmission comprising:

• a housing mounted on a lower portion of an outer tub;
• a brake drum extending through a lower surface of the housing and supported by the housing;
• a spin tub shaft which is connected to the spin tub at an upper portion of the spin tub shaft and is screwed to an upper portion of the brake drum at a lower portion of the spin tub shaft for rotating a spin tub in a first direction;
• a driving shaft which extends through the brake drum, is coupled with a belt pulley at a lower end of the driving shaft, and rotates in the first direction for having a power transmitted from a driving source;
• a driven shaft which extends through the spin tub shaft and is coupled with a pulsator at an upper end of the driven shaft, for rotating the pulsator in forward and reverse directions;
• a clutch spring for connecting said driving shaft with said brake drum so that power is transmitted to said brake drum, wherein an upper portion of said clutch spring is wound around an outer peripheral surface of a shaft portion of said brake drum, wherein a lower portion of said clutch spring is wound around a coupling mounted on the driving shaft, and wherein a periphery of said clutch spring is enclosed by a clutch boss;
• and
• a power transmitting means for connecting the driving shaft and the driven shaft, for transmitting a rotation of the driving shaft which rotates in the first direction to the driven shaft, and for rotating the driven shaft in the forward and reverse directions, wherein said power transmitting means comprises a first link which is attached at a first end to an upper end of the driving shaft and has a first guide pin mounted on a second end of said first link, for rotating with the driving shaft, a second link which is hinged to an inner peripheral surface of the brake drum at a first end of the second link, which has a second guide pin mounted on a second end of said second link, which has a first oblong slot formed between said first end and said second end, and which is connected to said first guide pin of said first link, and a third link which is attached to a lower end of the driven shaft at a first end of said third link, which has a second oblong slot formed at a second end, and which is coupled with said second link.