DE7422203U - COUNTER-KNIFE HOLDER ON BLOWING OR CUTTING MILLING MACHINES - Google Patents

Description

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The invention relates to a counter holder beating or cutting shredding machines, e.g. with a rotating rotor attached to a cylindrical rotor Mallets or knives that are used to shred plastic waste, rubber waste, e.g. old tires, Use bulky waste or wood.

At the mouth of the feed chute for impact or Knife rotor must have a sharp edge over which the striking or cutting tools with the least possible Be passed by gap. Since there is heavy wear and tear on this edge, replaceable parent sets have developed Alloyed tool steel, so-called "counter knife", has proven its worth.

In the past, these counter knives were screwed onto a heavy and stable yoke, also called an anvil. Also the name Counter knife bar is common. This counter knife bar is a solid steel "beam" or a steel profile, which at the end of the feed shaft, if necessary between feed rollers, Chains or straps are attached to the machine frame.

Tightening the replaceable counter knife on the counter knife bar is time consuming and dangerous, therefore one has after quick change devices for the counter knife searched.

Known are fully or partially axially extendable counter knife bars, to which the counter knives are fastened outside the machine with screws. As a result, the Reduced dangers that exist when working inside the machine, but the time required to change the counter knife is not significantly shortened.

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With wood cutting machines for the production of thin surfaces Wood chips are also known quick-change devices for counter-knives, in which the counter-knife is pulled out of the counter-knife bar on a knife carrier tsnn and is hydraulically clamped in this bar with the knife carrier in the operating state. Except for However, the machine must still have the counter knife according to an adjustment gauge after regrinding on the knife carrier to be screwed with the highest accuracy so that it after inserting the chipper knife sits close to the cutting circle again. For shredders where In contrast to chippers, the counter knife hits much harder blows, this is a well-known construction Cannot be used, as the counter knife is only connected to the knife carrier with a force fit by screws. Also the work required outside the machine is disadvantageous.

Much more taboo counter knife carriers. which are laterally pulled out of the machine with the counter knife screwed onto it, are also known in chopping machines, however the counter knives must be very firmly connected to the knife carriers with numerous, larger screws, like this that the workload is the same compared to completely removable counter knife bars.

The invention avoids all these disadvantages by means of a counter knife holder in which a fixed counter knife bar a rectangular cross-section steel profile is installed as a counter knife slightly inclined to the radius of the rotor, so that the narrow side of the counter knife forms a clearance angle with the flight circle of the rotor, while this narrow side is outside of the rotor against fixed adjustable adjusting screws and through from the opposite narrow side Locking screws is pressed against this. The Br its side of the counter knife is also in the operating state with a continuous clamping wedge in the wedge-shaped groove of the counter

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knife bar clamped. The adjusting screws for the counter knife and the clamping screws for the clamping wedge can be attached in a threaded plate on the machine frame on both sides of the rotor while the locking schrsühpn for the counter knife and jacking screws for the clamping wedge can be located below the wedge-shaped groove in the counter knife bar.

The advantages of this holder according to the invention are obvious. A simple bright drawn flat steel made of alloyed tool steel is used as the counter knife itself without special grinding, without slots or holes or threaded holes for any fasteners. This After being used on 4 sides, flat steel is only reground at right angles on both narrow sides. The counter knife edge that is effective in use comes through the adjusting screws always in the same position, but it can also be used with a changed flight circle of the rotor (e.g. different Hesser overhang for others Grain size of the chopped up goods) at any time by readjusting the adjusting screws can be changed. The locking screws always press the counter knife against these adjusting screws, so that it is already firmly supported by the clamping wedge when it is tightened. To change the counter knife just loosen the clamping wedge, loosen the locking screws a little and pull the counter knife axially out of the machine and pushed in again with a sharp cutting edge towards the rotor. The fixing and tensioning by the clamping wedge can of course also be done by other known means than screws, e.g. by small hydraulic cylinders.

The figure explains the invention in more detail. The counter knife 1 is spaiint fixed by the clamping wedge 2 in the counter knife bar 3 and with its cutting edge facing the flight crisis 4 of the shredding rotor by means of adjusting screws 6 seated in the threaded plates 5 with lock nuts 7.

The clamping wedge 2 is pressed by clamping screws 8 with lock nuts 9 into the wedge-shaped groove of the counter knife bar, which is also arranged in the threaded plate 5 on the machine frame 10. To loosen the fastening, the clamping wedge 2 is tightened by means of the forcing screws 11 in countermeasure. S β rb -2.1 k β π h ο ch ο? dri ΐ c »-. Dip locking screws 12 with K ο η nut nuts 13 also in the counter knife bar are loosened and the counter knife 1 is pulled sideways out of the machine. A scraper comb 14 can also be attached to the counter knife bar, which guides the material to be shredded from the feed shaft from the longitudinal and transverse grooved draw-in rollers 15 to the counter knife bar 3, so to speak as a scraper. As mentioned above, the invention is not limited to the mechanical fastening means for counter knife and clamping wedge shown here.

Claims (2)

Counter knife holder on hammering or cutting shredding machines. Protection claims: 1. Counter knife holder on percussive or cutting shredding machines, preferably with rotating Striking or cutting tools marked in a counter knife bar firmly connected to the machine frame slightly inclined by the storage of a rectangular cross-section steel profile as a counter knife (1) to the radius of the rotor, so that the narrow side of the counter knife (1) has a clearance angle with the flight circle (4) of the rotor forms, this narrow side of the counter knife (1) outside of the rotor against a fixed setting Adjusting screws (6) and supported by the opposite The narrow side is pressed against this by the locking screws (12), while the broad side of the counter knife (1) in the operating state with a continuous clamping wedge (2) in the wedge-shaped groove in the counter knife bar (3) be clamped. 2. Counter knife holder according to claim 1, characterized by locking screws (12) for the counter knife (1) and jacking screws (11) for the clamping wedge (2) in the counter knife bar (3) and adjusting screws (6> for the counter knife (1) and clamping screws (8) for the clamping wedge (2) in a threaded plate (5) on the machine frame.