Protective hood for grinding machines, particularly angle grinde

Details Protective hood for grinding machines, particularly angle grinde Protective hood for grinding machines, particularly angle grinde

1989-04-28

1991-04-09

Rachuba, M.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51268, B24B 2302

Patent

active

050053213

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

The invention relates a protective hood for grinding machines, particularly for angle grinders, and a suitable fastening receptacle for the latter. In grinding machines, an allowable circumferential speed of the clamped-in grinding disk should not be exceeded. The maximum allowable grinding disk diameter is dependent on the normal speed of the machine. Thus, taking this into account, only grinding disks up to a maximum allowable diameter may be clamped in. In order to be able to exert influence over this, it is known that grinding machines which are smaller with respect to their output are dimensioned so as to be smaller, with respect to a cylindrical fastening shoulder, than machines having a higher output. Accordingly, only protective hoods whose securing part is likewise dimensioned so as to be correspondingly small fit on the smaller fastening shoulder. Such small protective hoods then only allow grinding disks to be clamped on which are, at most, the same size as, but not larger than, the protective hood. It is known, according to this principle, to effect rough gradations with two different diameters of the fastening shoulder. Aside from the fact that such a rough gradation is insufficient, variously dimensioned cast parts, different machine adjustments while utilizing the machine, and also different suitably fitting accessories are necessary. This is costly and cumbersome. Because of the need for different machine adjustments during the machining, handling becomes impractical.


SUMMARY OF THE INVENTION

The object of the invention is to provide a protective hood for grinding machines, particularly angle grinders, and suitable fastening receptacle for the latter, in which coding is provided with simple means between the grinding machine, specifically its fastening shoulder, on one hand, and the protective hood, specifically its securing part, on the other hand, the coding being designed in such a way that smaller protective hoods can be mounted, but not protective hoods which are larger than the maximum allowable. The clamping collar diameter of the fastening shoulder has always the same size. Therefore, a single part, which generally consists of a cast part, is sufficient for the fastening receptacle. The reduction of the individual parts leads to a reduction in cost and a simplification of storage. In addition, because of the constant clamping collar diameter, a simplification and reduction of the accessories is also achieved. Further, it is ensured that the user of a grinding machine which allows a larger protective hood, per se, corresponding to its output and coding, can also attach a smaller protective hood, as desired, at any time, which e.g. is desirable for reasons of handiness. This advantage also results from the clamping collar diameter of the fastening shoulder, which diameter is the same for all sizes.
The present invention as to its construction so to its mode of operation, together with additional objects and advantages thereof, will be best understood from the following description of the preferred embodiments with reference to the accompanying drawings.


BRIEF DESCRIPTION OF THE DRAWING

FIG. 1 shows a schematically perspective view of a manually operated angle grinder including a hood according to the present invention;
FIG. 2 shows a bottom view only of the fastening receptacle of the angle grinder of FIG. 1, according to a first embodiment;
FIG. 3 shows a partially sectional side view of the fastening receptacle of the angle grinder of FIG. 2;
FIG. 4 shows a sectional view of a protective hood of the grinding machine of FIG. 1 according to a first embodiment and, which fits with the fastening receptacle;
FIG. 5 shows a top view of the protective hood of FIG. 4;
FIG. 6 shows a bottom view of a fastening receptacle of a second embodiment which is similar to that shown in FIG. 2;
FIG. 7 shows a top view of a protective hood similar to that of FIG. 5 which fits with the fastening receptacle of FIG. 6, according to the second embodiment;
FIG. 8 shows a b

REFERENCES:
patent: 4574532 (1986-03-01), Haberle et al.

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