Plastic tub for a washing machine or a washer dryer
View Patent ↗A plastic tub for a washing machine includes a cylindrical casing; and an end face wall sealing the cylindrical casing. The end face including a bearing mount for a shaft of a laundry drum and radially-aligned reinforcing ribs molded into the end face wall. The reinforcing ribs begin at the bearing mount and branch in a Y-shape along their radial extent.
1. A plastic tub for a washing machine comprising:
a cylindrical casing; and
an end face wall sealing the cylindrical casing, the end face wall including a bearing mount for a shaft of a laundry drum and an annular array of radially-aligned, plastic reinforcing ribs molded into the end face wall, the reinforcing ribs extending in a radial direction from the bearing mount, each reinforcing rib branching into a first Y-shape having two branches, each of said two branches expanding into second and third Y-shapes, respectively, from node points alternately arranged on two circular lines arranged concentrically to the bearing mount.
2. The plastic tub of claim 1 , wherein the branching of the Y-shaped reinforcing ribs is symmetrical.
3. The plastic tub of claim 1 , wherein the reinforcing ribs are aligned symmetrically to one another and at an equal distance about said bearing mount.
4. The plastic tub of claim 1 , wherein a height, width and/or wall strength of the reinforcing ribs and a wall strength of the end face wall are attuned to one another such that a rigidity of the end face wall increases evenly from an outer edge to the bearing mount.
5. The plastic tub of claim 1 , further comprising transverse ribs connecting the reinforcing ribs molded in the end face wall, with individual transverse ribs forming a closed ring.
6. The plastic tub of claim 5 , wherein node points of the transverse ribs are arranged on a third circular line arranged concentrically to the bearing mount.
7. The plastic tub of claim 5 , wherein individual sections of the transverse ribs are in a straight line between the reinforcing ribs.
8. A plastic tub for a washing machine comprising:
a cylindrical casing; and
an end face wall sealing the cylindrical casing, the end face wall including a bearing mount for a shaft of a drum located within said cylindrical casing, and an annular array of radially-aligned, plastic reinforcing ribs molded into the end face wall, the reinforcing ribs extending in a radial direction from the bearing mount, each reinforcing rib branching into a first Y-shape having two branches, each of said two branches expanding into second and third Y-shapes, respectively, from node points alternately arranged on two circular lines concentrically arranged relative to the bearing mount; wherein a height, width and wall strength of the reinforcing ribs and a wall strength of the end face wall are attuned to one another such that a rigidity of the end face wall increases evenly from an outer edge to the bearing mount; and further wherein
transverse ribs connecting the reinforcing ribs are molded in the end face wall and form a closed ring.
9. The plastic tub of claim 8 , wherein the branching of the Y-shaped reinforcing ribs is symmetrical.
10. The plastic tub of claim 8 , wherein the reinforcing ribs are aligned symmetrically to one another and at an equal distance about said bearing mount.
11. The plastic tub of claim 8 , wherein individual sections of the transverse ribs are in a straight line between the reinforcing ribs.
12. The plastic tub of claim 11 , wherein node points of the transverse ribs are arranged on a third circular line arranged concentrically to the bearing mount.