DE102012005240A1 - Axis balancing system for knife shafts of shredders, has working screw and knife pin, which are separately executed, where connection between working screw and cutting set is made as plug connection with axis balancing task - Google Patents

Abstract

The axis balancing system has a working screw (1) and a knife shaft, e.g. a knife pin (2), which are separately executed. The connection between the working screw and a cutting set receiving the knife pin is made as a plug connection with axis balancing task. A connecting element has an imaging geometry (5) of the knife pin, where the working screw is removably connected to a screw connection (6). The connecting element between the knife pin and working screw is designed as a bearing point (7), which balances a possible angular displacement between the working screw and the knife pin.

Description

Meat grinders work on the principle of push-pressure generation by conveying the material to be processed by means of so-called working screws through a multipart cutting set, which usually consists of a pre-cutter and different combinations of knives and perforated discs.

The cutting set components are selected according to the desired degree of comminution and attached to the blade pin, which is firmly connected to the screw and the blades rotate with the speed of the screw.

The pressed through the openings of the fixed perforated discs raw material is then cut off each by the driven by the working screw knife.

The storage of the working screw is inadequate in the cutting set area, since there is great play in the cutting set housing.

A centering of the screw can only be done when the cutting space is completely filled with raw material.

This conventional design is for the comminution of frozen meat little, or not suitable because the working screw, and the cutting set elements are subjected to very high loads.

The frozen meat blocks to be crushed lead in the present one-sided raw material acceptance of the working screw in conjunction with high crushing resistance of the raw material block to bending loads of the screw, as well as during transport, due to the consistency of the material and different degrees of filling of the flights to shock loads, the strong signs of wear all the way to Material breaks are connected.

Particularly high wear occurs at the transfer from the hopper in the processing housing, on the working screw and all knives and perforated discs of the cutting set, while the positively acting blade pin is often loaded at its weakest point, the connection to the working screw to breakage.

A structural design with regard to the mechanical stability of the loaded components is only possible to a limited extent, since in this case the flow of raw material through the cutting set is inevitably reduced.

In the processing of frozen meat, the significantly higher load on the machine with concomitant increasing quality reduction of the final product, as well as shorter use times of the screws and cutting parts must be considered. At the same time, it must be assumed that the possible destruction of components can lead to high consequential damage to the machine and to the loss of the entire batch.

The invention is therefore based on the object to eliminate known deficiencies, to reduce wear and destruction of components, or to prevent and thus significantly increase the reliability, ease of assembly and disassembly of the cutting components, as well as the performance of the machine while maintaining the required To increase quality parameters.

The aim of the invention is therefore to reduce the working screw, especially at the transition to the knife pin, acting high load forces and thus the rapid wear or destruction of the components involved in the crushing of frozen meat, and ensuring a continuous crushing process with longer maturities in compliance constant performance and quality parameters.

The reduction of mechanical load peaks by the action of high forces on the working screw ( 1 ) as a pressure and thrust generating element and in particular on the knife pin ( 2 ) is renewal by the separation of the working screw from the blade pin and the installation of a connecting element ( 4 ) for a plug connection, as well as a storage location ( 7 ) are guaranteed for working screw and knife pin. By separating the knife pin ( 2 ) from the working screw ( 1 ) the course of resulting high bending stresses in the working screw is interrupted and thus a bending deformation in the knife pin area, or the breakage of the knife pin ( 2 ) be prevented.

The uptake of the very high bending stresses occurring during raw material acceptance by a depository ( 7 ) and the power transmission from the working screw ( 1 ) on the knife pin ( 2 ) via an element for plug connection ( 4 ) should also be arranged on the knife pin cutting set elements ( 3 ) to protect against load peaks and extreme wear so that a uniform, high throughput shredding process can be achieved.

According to the invention, the object is achieved as described below.

Working screw ( 1 ) and knife shaft, also knife pin ( 2 ), are performed separately, primarily to prevent the transmission of high bending stresses from the working screw on the blade pin.

The power transmission from the working screw on the blade pin and the rotating with the speed of the working screw blade via a connecting element ( 4 ), which screwed to the working screw ( 6 ).

This ensures interchangeability.

The connecting element ( 4 ) has a recording geometry ( 5 ) for insertion and for positive entrainment of the knife pin ( 2 ) through the working screw ( 1 ) and is a depository ( 7 ) designed so that it can compensate for alignment inaccuracies and thus a possible tilting of the cutting elements ( 3 ) prevented.

In conjunction with the inclusion of a knife, for example a pre-cutter with clamping element ( 9 ) takes over the depository ( 7 ) both the storage ( 8th ) of the working screw and the positive power transmission of the knife pin. Locking contours ( 10 ) at the knife pin ( 2 ) ensure a defined position of the blade pin to the working screw, or to the bearing ( 7 ).

Thus, the assembly of the cutting set elements ( 3 ) on the knife pin ( 2 ) Also possible outside of the cutting set housing.

Likewise, the complete cutting set can also be pulled out of the housing with the blade pin.

Further advantageous embodiments of the invention will become apparent from the claims of the invention and the drawings.

The drawings after 1 to 2 demonstrate:

1 the working screw with knife pin holder, bearing and knife pin with cutting set elements as a sectional view

2 the example representation of the locking contours in 2 views

LIST OF REFERENCE NUMBERS

1

working worm

2

blade pin

3

Cutting set elements

4

Connecting element to the connector

5

Mounting geometry for knife pin

6

screw

7

depository

8th

Storage of the screw

9

Cutter with clamping element

10

locking contours

Claims (6)

Axis compensation system for knife drive shafts of grinding machines with screw feed and knife / perforated disk combinations, preferably of meat grinders, hereafter called axis compensation system for knife shafts, characterized in that working screw ( 1 ) and knife shaft, also knife pin ( 2 ), are carried out separately and the connection between the working screw and the, the cutting set ( 3 ) receiving knife pin as a connector ( 4 ) is performed with Achsausgleichs task. Knife drive shaft axle compensation system according to claim 1, characterized in that the connecting element ( 4 ) on the one hand a receiving geometry ( 5 ) for the knife pin ( 2 ) and on the other hand by means of screw ( 6 ) interchangeable with the working screw ( 1 ) connected is. Axle compensation system for knife drive shafts according to claims 1 and 2, characterized in that the connecting element ( 4 ) between knife pins ( 2 ) and working screw ( 1 ) as a depository ( 7 ) is designed, the one possible angular displacement between working screw ( 1 ) and knife pins ( 2 ) can compensate. Axis compensation system for knife drive shafts according to claims 1, 2 and 3, characterized in that the bearing point ( 7 ) is designed so that it both the storage ( 8th ) can take over the screw, as well as a cutting attachment, such as a pre-cutter with clamping element ( 9 ). Axle compensation system for knife drive shafts according to claims 1 to 4, characterized in that the knife pin ( 2 ) Locking contours ( 10 ), which has a defined position of the blade pin to the working screw ( 1 ). Axle compensation system for knife drive shafts according to claims 1 to 5, characterized in that both assembly and disassembly of the cutting set elements ( 3 ) on the knife pin ( 2 ) are possible outside the cutting set housing.

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