DE9203651U1 - Flail-like working tool for shredding waste during composting - Google Patents

Description

European Patent Attorney

N OR B ΦΦ W. SiEE MAN N

Patent and Civil Engineer Mandataire en brevets Europeanen

Applicant:

J. Willibald GmbH

Machine factory

Bahnhofstrasse 6

7794 Wald Sentenhart

Patent office:

Brehmstrasse D-7320 Göppingen

Tel. 07161-71166 Fax 07161-683529

Telegrams: "Sea patent"

12 March 1992 G 9210 W Se/es

Flail-like working tool for shredding waste during composting

The innovation relates to a composting flail according to the generic term of claim 1.

Such two-part hammers are already known in a relatively large number of structurally different systems from literature and practice and work more or less satisfactorily in terms of performance, service life and cutting quality.

Kreissparkasse Göppingen (bank code 61(IfOOOOi, account 474595- ' , _: . PqstsciiecfcjJQnto Stuttgart (bank code 60010070) no. 189103-702

The task of the present innovation is therefore primarily to improve the factors listed above considerably by means of suitable technical detail measures, especially in such a way that a large amount of cutting work can be carried out with a low drive power, while at the same time ensuring a long service life for tool damage and the quality of the shredding result.

This task is solved by the structural means and measures specified in claim 1; the subclaims contain advantageous further developments and design details of the new spatial form concept, which is also shown using an exemplary embodiment in the drawings and is explained in more detail below. They show:

Fig. 1 a system representation of the innovation

in side view,
20

Fig. 2 is a slightly enlarged view of the Schiel tool from Fig. 1 with the special design details and
Fig. 3 is a front view of Fig. 2.

The new flail design and flail assembly of the working shaft of a shredding machine consists in its basic structure according to Fig. 1 of a large number of consoles K that are fixed and evenly distributed on the shredding rotor R, to which cutting heads SK pointing in the direction of rotation U are interchangeably connected via clamping screws SP. What is new in such a design is that the cutting head SK has an acute-angled ß head cutting edge 1 pointing in the direction of rotation U of the rotor R and, starting from this, cutting shoulders 2 extend on both sides in the direction of the surface RO of the rotor R, and the latter 2 extend backwards by a certain amount x from the head cutting edge 1 against the direction of rotation U of the flail. The acute-angled head cutting edge 1 therefore makes a kind of preliminary cut when it hits the material to be reduced in size, while the cutting shoulders 2 on both sides of it carry out the actual main shredding work.

In a special structural design, the new flail is further provided with the cutting shoulders 2 extending downwards from the head cutting edge 1 over approximately half the flail height H and

beneath both cutting edges 1 and 2 there is a trough-like or trough-like chip removal chamber with free channels as chip outlet openings 4 on both sides S of the slat base S; due to the good chip removal provided by this, the cutting edges 1 and 2 always directly hit the material to be shredded with their cutting edges 1a and 2a, whereby the full power supplied is achieved with almost no damping losses.

In order to ensure that the cutting edges 1 and 2 resharpen themselves as much as possible during work, they are also provided with bead-like cutting edges la and 2a that protrude or are raised relative to the actual body of the flail. The fact that the underside SU of the flail base S is flat or rests flat on the top side RO of the rotor R and the back RS of the flail head SK has a centering projection ZA in the area of the through hole DB for the clamping or fastening screw SP that engages in a corresponding recess AK in the console K also prevents the cutting head SK from twisting.

The system of the previously described narrow or claw-like head cutting edge with adjoining, trailing and widening cutting shoulders, in conjunction with the chip removal channels open to the sides of the blade, results in high cutting performance even with low drive energy, so that even thick tree trunks, stumps, root stocks or other materials can be effectively chopped.

List of reference numbers

1 head cutting edge

la raised cutting edge or bead

2 cutting shoulders

2a raised cutting edge or bead

3 Chip removal chamber or channel

4 Chip outlet opening

β cutting edge acute angle

&khgr; Cutting edge offset

A Cutting head width

AK recess (console)

BD through hole

H Flail height

K Console

R Rotor

RO rotor surface

RS mallet back

5 hammer base S, hammer sides SK cutting head

SP clamping screw

SU base base

U UmI erection

ZA centering approach

Claims (12)

Dipl.-Ing. European Patent Attorney NORBERjM SEEIWVNN ■:■ 'j Ot? Patent and Civil Engineer Mandataire en brevets Europeanen Applicant:
J. Willibald GmbH Maschinenfabrik Bahnhofstraße 6 7794 Wald Sentenhart Patent office: Brehmstrasse D-7320 Göppingen Tel. 07161-71166 Fax 07161-683529 Telegrams: "Sea patent" 12 March 1992 G 9210 W Se/es Protection claims 1. Flail-like working tool consisting of a replaceable cutting head (SK) and a console (K) fixed to a rotor (R) on devices for shredding small and waste wood, coarse branches, tree stumps, etc., primarily for the purpose of composting, through this marked, that the cutting head (SK) has an acute-angled (ß) cutting edge (1) pointing in the direction of rotation (U) of the rotor (R) and, starting from this, cutting shoulders extending on both sides in the direction of the surface (RO) of the rotor (R) (2) and the latter (2) extend backwards by a certain amount (x) against the direction of rotation of the flail (U) from the head cutting edge (1). 2. Schiegel-like working tool according to claim 1, characterized, that the cutting shoulders (2) extend downwards from the head cutting edge (1) for approximately half the height (H) of the flail and below both cutting edges (1 and 2) there is a trough-like or trough-like chip removal chamber (3) with free channels as chip outlet openings (4) on both sides (S ₁ ) of the flail base (S). 3. A shovel-like working tool according to claims 1 and 2, characterized, that the two cutting edges (1 and 2) have bead-like protruding or raised cutting edges (la and 2a) compared to the actual body of the mallet. 4. Flail-like working tool according to claims 1 to 3, characterized, that the underside (SU) of the slat base (S) is flat or rests flat on the top side (RO) of the rotor R. 5. Flail-like working tool according to one or more of the preceding claims, characterized, that the rear side (RS) of the locking head (SK) in the area of the through hole (DB) for the clamping or fastening screw (SP) has a centering projection (ZA) that engages in a corresponding recess (AK) in the console (K) having.