Solid material comminution or disintegration – Apparatus – Comminuting elements
Patent
1995-04-12
1996-12-10
Rosenbaum, Mark
Solid material comminution or disintegration
Apparatus
Comminuting elements
B02C 1818
Patent
active
055823530
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a cylindrical cutter body that has base elements that project from the cutter body surface. A cutter holder supporting a cutter plate can be positioned on each base element.
2. Description of Prior Art
Conventional cutter bodies in the form of motor-driven rotating tools are used, for example, for comminuting bushes branches, and the like The base elements have a blind-bore-like receiver that has a square cross section. A neck of the cutter holder, whose cross section is conformingly designed, is inserted and fixed therein. Because of the greatly fluctuating, shock-like load variations acting on the cutter plates during operation, the insertion areas of the receivers become widened over time. Thus, the neck develops free play, and the receiver easily catches and the base element must be replaced.
The base elements are generally welded to the cutter body, and thus their replacement is very complicated and cost-intensive.
SUMMARY OF THE INVENTION
It is one object of this invention to produce a cutter body of the above-mentioned type in which the base elements and the cutter holders have an extended service life, even when subjected to relatively high load shocks, and wherein the cutter holders can be simply and easily replaced.
This object and others are achieved in accordance with the invention in that the cutter holder can be connected with the base element by a pivot bearing. An axis of the pivot bearing is preferably oriented parallel to or at an angle with the axis of rotation of the cutter body. Twisting between the cutter holder and the base element opposite with respect to the direction of rotation of the cutter body is limited by a stop of the cutter holder or the base element.
The base element remains fixedly connected to the cutter body. During assembly, the cutter holder is simply rotatably seated in the base element and is held in a defined position because of twisting motion during operation.
Thus, seating free play has been eliminated in a simple manner, even under shock-like loads. If there is play between the base element and the cutter holder, for example because of incorrect assembly, the cutter holder is centered at the first engagement movement with the material to be chopped because of the twisting motion at contact. Freedom from play is assured in this way.
In accordance with one preferred embodiment of this invention, the cutter holder is formed in the shape of a drumstick, wherein two parallel legs spaced apart from each other are formed on a body, and a receiver is formed between the legs. The base element can be introduced into the receiver and rotatably connected to the legs. The cutter holder can be easily mounted, and an even force transfer from the cutter holder to the base element is achieved.
A cost-effective design of the pivot bearing is achieved because the pivot bearing includes a fastening screw and two screw receivers of the base element. The cutter holder is aligned with the two screw receivers, and the fastening screw is inserted into the screw receivers and secured by a nut. The cutter holder and the base element can be clamped together, in this manner. Thus, rotation in the pivot bearing occurs only after application of a sufficient force, so that the cutter holders do not rotate away from the stop under their own weight.
A compact and small construction of a cutter body is achieved in that a shoulder is positioned on the base element in the direction parallel to the operational direction of the cutter body. A stop is formed at the back of the base element opposite the operational direction of the cutter, at the end of the shoulder and at approximately a right angle to the shoulder. The back of the base element preferably has a recess, and the front of the base element has a projection. The projection matches the recess of an adjacent base element.
Thus, the individual base elements can be aligned closely adjacent to each other. The cutter plates fastened on the cutter holders are al
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patent: 4077450 (1978-03-01), Ackerman
patent: 4136833 (1979-01-01), Knight
patent: 4946109 (1990-08-01), Lewis
patent: 5205667 (1993-04-01), Montgomery
Ahwi Maschinenbau GmbH
Rosenbaum Mark
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