Washing machine laundry drum

Abstract

The laundry drum 1 is set up for removing water from wet laundry at high revolutions and has a circulating drum cover 2 which is bent from a thin-walled material strip to form a cylinder or flat truncated cone in such a way that the parallel end edges 3 and 4 of the material strip make contact in a connecting seam 5. In order that the laundry drum also withstands drum speeds above 1500 rpm in future, the end edges 3 and 4 have a crenellated toothing system 6 to 9, the teeth 6 and 7 of which engage in each case in the tooth gap 8 and 9 of the mating end edge in such a way that the base lines 11 of the tooth gaps 8, 9, butting against one another, form an at least approximately straight line and the teeth 6, 7 abut in the non-toothed region 8, 9 of the end edge 3, 4 outside the drum above the material strip and are connected fixedly there to the region 8, 9. Under a curved driver, the connecting seam 5 can also be curved in parallel.

Description

technical field [0001] The invention relates to a washing tub of a washing machine, which is provided for dehydrating wet laundry at a high speed and has a rotating tub shell, which is bent to form a tub or has a small cone angle (≤ frustum of about 15°) so that the end of the strip of material touches the connecting seam. Background technique [0002] Such a washing tub is known from patent publication EP 039585981. The washing tub shows a conventionally applied joint seam, with which the end edges of the tub shell strips are bent and interlocked with each other and shaped by additional folds so that the interlocked ends The outer edges cannot be disassembled from each other. A washing tub with a connection seam of this structure is suitable for high-rotational dehydration with a rotation speed of up to 1000 rpm. Patent publication EP039585981 also proposes to provide the connecting seam with corrugated reliefs arranged at right angles thereto in order to stabilize the s...

AI Technical Summary

Problems solved by technology

Although this form of connecting seam satisfies all the proposed technical purposes, it may be too expensive for one or the other, since the two ends must be cut quite precisely in a toothed manner in order to achieve the desired stability

Also, the tools used for this edge shaping are more expensive and wear out faster than smooth cutting tools

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