Brushing – scrubbing – and general cleaning – Implements – Brush or broom
Patent
1999-03-26
2000-12-26
Graham, Gary K.
Brushing, scrubbing, and general cleaning
Implements
Brush or broom
451507, A46B 308
Patent
active
061639176
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a rotary brush for surface treatment of workpieces and more particularly to such a brush including a fitting or clamping joint between a pair of axial collars, at least one of which has axial ribs on its circumference.
BACKGROUND ART
Known rotating circular brushes are usually produced by disposing the brush fitting, which includes for example one or more disk-like brush elements, between a plurality of pressed metal parts. This construction has hitherto been used by all brush manufacturers and is still applied today in a great number of similar forms.
In contrast, DE-U 295 13247.7 discloses a rotary brush of the generic kind wherein the brush fitting is clamped between two interconnected clamping disks and thereby mounted on an essentially cylindrical holding element formed by said clamping disks.
Although this known rotary brush has proven very advantageous, it has turned out that there is still a need for simplified production of the brush and an essential reduction of material costs.
The invention is therefore based on the problem of designing the brush of the generic kind so as to simplify production while achieving a considerable reduction of material costs and simultaneously a lower weight involving further handling advantages.
The features of the invention solving this problem can be found in claim 1. Advantageous embodiments are described in the further claims.
SUMMARY OF THE INVENTION
The inventive rotary brush is designed such that the clamping disks each have on their mutually facing side an axial collar whose outside or inside diameter is such that when the clamping disks are fastened together the axial collar of one clamping disk engages that of the other clamping disk in connecting fashion so as to form the clamping disk connection and this simultaneously forms the cylindrical holding element for mounting the brush fitting.
This design is based on the essential inventive idea of not providing the axial collars of the two clamping disks only for mounting the brush fitting, but designing them so that they fix the two clamping disks together themselves. This can be easily obtained with simple production techniques so as to ensure a simple and reliable connection of the clamping disks.
In one embodiment of the invention, the axial collars of the two clamping disks have the same length, while in a second embodiment the collars have different lengths.
The engaging connection between the axial collars of the two clamping disks includes a fitting or clamping joint. The fitting or clamping joint between the axial collars is formed by at Least one of the collars having elevations, in particular in the form of axial ribs, on its circumferential surface cooperating with the other collar.
When the two clamping disks are pressed together, which is done using a 20 ton press for example, these elevations are connected effectively with the associated circumferential surface of the other collar by the action of force, thereby achieving the desired reliable connection between the clamping disks. In one embodiment, the engaging connection between the axial collars of the two clamping disks is formed or secured by adhesive applied to at least one of the cooperating circumferential surfaces of the axial collars.
In an expedient embodiment of the inventive rotary brush, the axial ribs are provided on the outside circumferential surface of the smaller-diameter axial collar. Two axial ribs are advantageously present in each case. However, it is within the scope of the invention to provide three, four or more axial ribs instead.
It is advantageous for the axial ribs to be spaced the same circumferential distance apart, since this also achieves a uniform clamping effect over the circumference of the axial collars.
In order to facilitate the joining of the two clamping disks by the action of high force in the initial stage, the axial ribs are preferably beveled on their front free faces.
Accordingly, it is also within the scope of the invention for the axial colla
REFERENCES:
patent: 260336 (1882-06-01), Thayer
patent: 680418 (1901-08-01), Ross
patent: 2136103 (1938-11-01), Herold
patent: 2658802 (1953-11-01), Stahel
Brushes International Limited
Graham Gary K.
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