EP3566777A1 - Shaft grinder - Google Patents

Abstract

A wave crusher (1) has a machine frame and a shredding unit (2). The comminution unit (2) comprises at least one comminution shaft (8, 9), which is mounted therein and driven by a drive. Adjacent to the comminution unit (2), a material feed area is formed, which comprises a plurality of side walls (4, 5, 6, 7). At least one of the side walls (4, 5, 6, 7), in particular at least one with respect to the axial direction of the crushing shaft (8, 9) frontally disposed side wall (4, 7) can be brought from a use position into a maintenance position, in particular hinged or displaceable , educated.

Description

The invention relates to a shaft shredder, in particular two-shaft shredder, according to the preamble of claim 1.

Corresponding wave shredders are for example off EP 3 248 687 A1 known. The well-known wave shredder is a twin-shaft shredder and has crushing shafts with thereon, circumferentially surrounding the shaft and spaced apart in the axial direction crushing tools. The two shafts are arranged with mutually parallel axes of rotation so that they mesh with each other by immersing the comminuting tools of one shaft in the existing between the crushing tools of the other shaft interstices.

The known wave shredder has a shredding unit which defines a shredding area in which the crusher waves can grasp the material to be shredded. Spatially distinguishable from this is a so-called material application area, which adjoins the crushing area of the comminution unit adjacent to it, as a rule adjacent to the direction of gravity, that is, with respect to the direction of gravity, in the horizontal direction. Usually, such a material feed area has a number of - often funnel-shaped converging - side walls.

In generic wave shredders, there is often the problem that objects get caught, for example in the crushing waves or the crushing tools are worn. In such cases, a maintenance must be performed, which is proposed in the known wave shredder to that on the longitudinal sides of the crushing waves in the crushing below the material application area inspection flaps are provided. These can be opened when the machine is at a standstill, thus allowing access to the shredding area.

Occasionally it happens that a corresponding shredding shaft has to be removed. In the generic document is proposed to couple the waves via an axial coupling with the machine frame. For removal, the shafts can be moved axially, whereby the axial couplings of the shredding shafts are decoupled from their drive. Next can then remove an end wall with stored therein waves as a two-shaft assembly.

This procedure is disadvantageous because the crushing waves can only be moved axially and then removed. In this case, the crushing area must be at least partially disassembled with the surrounding walls. This is associated with high assembly and disassembly effort.

Furthermore, especially with wave shredders with two shafts, there is often the problem that certain shreds that are to be crushed Objects are too light to be properly grasped by the crushing tools of the shafts. These objects then "dance" on the spinning waves without being caught and crushed by them. In stationary shaft shredders with only one shaft Nachdrückeinrichtungen be used for this purpose, with the help of which the light objects are pressed into the effective range of the crushing shaft. Usually, these pressing devices are installed in the form of a rocker on the end walls of the wave crusher in the material feed area. However, this installation would be in Wellenzerkleinerern with two crushing waves associated with a significant spatial limitation of the material feed area and thus the processing capacity of the wave crusher, so that the installation of a Nachdrückeinrichtung especially for mobile shredders with two crushing waves already eliminated for this reason.

Finally, depending on the application, there are shaft shredders with two shredding shafts that operate asynchronously, i. there is no defined ratio of the rotational speeds of the crushing shafts and their direction of rotation to each other. On the other hand, there are applications in which a synchronous operation of the shredding waves is advantageous. So far, separate shaft shredders are required for both applications.

The present invention is therefore based on the object of specifying a wave crusher of the type mentioned, in which the disadvantages described avoided or at least reduced.

This object is achieved in particular by a wave crusher having the features of claims 1, 11 and 14. Advantageous embodiments can be found in the dependent claims.

An inventive shaft shredder has a machine frame and a shredding unit. The latter comprises at least one mounted therein, via a drive-driven crushing shaft. Adjacent to the comminution unit, a material feed area is formed, which comprises a plurality of side walls. This material feed area is to be understood in particular as being outside the detection range of the comminution unit or the comminution shaft. In particular, the comminution area can be arranged above or above the at least one comminution shaft with respect to the direction of gravity.

According to the invention it is now provided that at least one of the side walls from a use position in a maintenance position can be brought, in particular hinged or slidably formed. This preferably applies to a plurality of the side walls, in particular all the side walls can be designed in this way. A sidewall in the sense of the invention may initially be any component which is suitable for laterally delimiting the material application area. At first it does not matter if such a side wall is arranged vertically or extends approximately obliquely to the horizontal. In particular, a component, which is commonly referred to as a tilting funnel, be a side wall in the context of the invention, as far as this tilting funnel limits the material application area.

It is preferably provided that at least one with respect to the axial direction of the crushing shaft end side arranged side wall can be brought into a maintenance position, in particular hinged or displaceable, is formed. End-side side walls are those walls which are not arranged parallel to the longitudinal sides of a comminution shaft, but transversely to the longitudinal extent of the comminution shaft, in particular in the region of their end sections, and in particular essentially above the comminution shaft.

In this way it is achieved that the coupling areas, including those areas are to be understood, in which the crushing shaft is coupled to a machine-side coupling portion, exposed. In the service position, bearing and / or coupling regions of the at least one comminution shaft are thus accessible. In this way, it is possible to expand the crushing shaft in the maintenance position of the machine frame and preferably upwards, ie in particular perpendicular to the direction of gravity to dig out of the crushing area, without consuming parts of the crushing area consuming or remove walls partially or completely.

It is particularly advantageous if the at least one comminuting shaft can be disassembled from the comminution housing at each end of the comminuting shaft at each end of the comminuting shaft by a detachable, positive coupling, in particular a screwable flange coupling, and the bearings of the corrugations remain on or in the comminuting housing. Of course, other forms of coupling are conceivable.

To improve the material task can be provided that a wall of the material feed area as, in particular the drive of the crushing shaft (at least in the position of use) at least partially overlapping, tilting funnel is formed. According to a preferred embodiment of the present invention, in particular designed as a tilting funnel, wall, in particular at least substantially horizontally, so movable, in particular displaceable, that thereby the space for the releasable, positive coupling is released for maintenance purposes. Alternatively or additionally, it may be provided that one of the side walls of the material application area can be moved, in particular pivoted or moved substantially horizontally, that the space for the releasable, positive coupling is released for maintenance purposes. All these measures ensure that no existing side walls need to be removed to perform maintenance or remove a crushing shaft.

According to a further preferred embodiment of the present invention, at least one post-shredding tool, in particular a breaking bar or sieve basket, can be arranged below or below the at least one comminuting shaft, in particular with respect to the direction of gravity. Preferably, the Nachzerkleinerungswerkzeug essentially - especially in relation to the direction of gravity - are raised or lowered in the vertical direction. The raising or lowering has, on the one hand, the advantage that, as a result, machine adjustments can optionally be made to the material to be shredded. On the other hand, it is possible to move the Nachzerkleinerungswerkzeug for maintenance of the crushing shafts. Thus, according to a further preferred embodiment, provision can be made, in particular, for the post-shredding tool to be moved out of the shaft shredder after it has been lowered. Preferably, after lowering the Nachzerkleinerungswerkzeugs the same can be moved out laterally like a drawer from the machine frame. Of course, the device may also be such that it provides this on the front side of the wave crusher. Preferably, the shaft crusher for applying the Nachzerkleinerungswerkzeugs located below or below the crushing shafts located on the inspection flaps, which make the Nachzerkleinerungswerkzeug available.

The shaft shredder according to the invention is preferably a twin-shaft shredder comprising two shredding shafts which lie next to one another, in particular with mutually parallel axes of rotation are arranged. For the purposes of the invention, juxtaposition does not necessarily mean horizontal alignment and parallel alignment of the two comminution shafts. Adjacent means only that the two crushing waves are arranged in close proximity. Thus, a V-shaped configuration of the two shredding shafts as well as an arrangement can be understood by it, in which the two waves are arranged in the direction of gravity offset vertically in the manner of a step offset from each other. In this sense, all relative configurations of both comminution waves are to be understood as being juxtaposed. In any case, a side-by-side configuration is given when the crushing tools located on the shafts mesh with each other, ie the crushing tools arranged on the periphery of the respective crushing shaft at least partially engage in the spaces between the crushing tools of the respective other crushing shaft.

According to a particular embodiment of the present invention, there is provided a shaft crusher having a machine frame and a shredding unit comprising two shredding shafts arranged side by side, the shredding shafts being driven via at least one drive and a material feeding area being formed adjacent to the shredding unit of side walls, wherein the wave crusher, in particular hereinafter is formed as described above, at least one, in particular driven, pressing device comprises. In this case, the push-over device comprises, for example, an elongate, in particular cylindrical, push-on element whose longitudinal axis preferably runs parallel to the axes of rotation of the comminution shafts. Of course, the pusher means may comprise a plurality of pusher elements disposed along the pearling shafts, which may comprise, for example, spherical pushers instead of an elongate pusher.

In particular light, bulky or voluminous parts in the material to be shredded, which are otherwise not picked up by the two comminuting shafts but rather are tossed back and forth on the shafts, can be pressed into the effective range of the tools of the comminuting shafts with the aid of this pressing-on device.

For this purpose, it can be provided according to a preferred embodiment of the present invention, that the Nachdrückeinrichtung from a use state in the field of crushing waves, in particular in the area between and / or above the crushing waves in a non-use state can be brought, in particular pivotable. The use state is the state in which the pressing device is actively involved in the comminuting process. This can for example be done so that it presses only by gravity on the material to be shredded. It is preferably provided that the pushing-on device is driven, ie actively in addition to Gravity presses material against the crushing waves. This can be done alternately so that a reciprocating movement of the pushing device is carried out on and off the shafts. In contrast, the non-use state of the pressing means the state in which, for example, new material enters the material application area and the Nachdrückeinrichtung is not actuated.

According to a preferred embodiment it is provided that the pressing-on device is attached to one of the side walls, in particular pivotably. Preferably, one of these side walls is a side wall provided on a longitudinal side of a comminution shaft. At this, the Nachdrückeinrichtung can be pivoted, for example via a drive, in particular by one or a plurality of hydraulic cylinders from the non-use position to the use position or moved in the position of use. Preferably, in this case, the push-on device is attached to a pivoting lever, which is pivotally mounted on the opposite end of the pressing element on the corresponding side wall. In this case, the pivot lever in the side wall is preferably mounted so that no opening in the side wall is formed in each pivot state of the pivot lever. This can be achieved, for example, in that a circular disk or at least one circular disk segment is rotatably mounted in the side wall with an axis of rotation parallel to the side wall, wherein the pivot lever is attached to this circular disk segment or circular disk. The through a storage opening In the side wall reaching through surface, in particular peripheral surface, the circular disc or the circular disc segment thereby closes the bearing opening in each pivot state.

According to a further preferred embodiment of the present invention, a shaft shredder with a machine frame and a comminution unit is provided which comprises at least two comminution shafts supported therein via a drive, wherein a material feed area is formed adjacent to the comminution unit. This twin-shaft shredder may be configured as described above. According to the invention, the shaft crusher comprises a shaft coupling device which is adapted to be moved by a synchronous mode in which the shredding shafts are moved in a defined speed ratio in the opposite direction of rotation, and an asynchronous mode in which the shredding shafts are moved in any direction of rotation and without defined speed ratio , is switchable. In this way, the wave crusher can be adapted to emerging requirements with regard to the comminution process.

According to an advantageous embodiment, the shaft coupling device has a displaceable or pivotable pinion to effect the switching from the synchronous mode to the asynchronous mode. Such a pinion can be easily by any drive or manually from a synchronous position, in which both waves coupled together, move to an asynchronous position.

For all embodiments presented here, it is true that, whenever there is talk of drives, of course, any type of drives can be meant.

The drive unit for the comminution shafts may preferably be diesel hydraulic or electrohydraulic.

According to a further embodiment of the present invention, it is provided that the shaft shredder according to the invention has coupled to the crushing waves or coupled, arranged on the drive side or on the drive side opposite side of the crushing shafts, in particular comprising the shaft coupling device, transmission device. Transmission devices are to be understood as meaning any type of coupling of a shaft to the drive underneath. There may be meshing gears as well as belt drives or chain drives. Each shredding shaft preferably has a separate transmission.

Furthermore, in the shaft shredder according to the invention, an electrical control for controlling and monitoring the mechanical, electrical and hydraulic processes and parameters of the machine can be provided.

As far as moving the side walls, of course, this can be done manually, of course, is also conceivable in that one or a plurality of side walls are hydraulically, electrically or mechanically movable. This can be done for example via the controller.

The side walls, which are provided on the longitudinal sides of the comminuting shaft, are preferably designed such that they can be brought close to the outer edge of the housing of the comminution unit. As a result, a direct accessibility to the crushing tools on the crushing shafts and the counter-combs is achieved. The counter combs are preferably mounted below the longitudinal side walls in the shredding unit.

Figur 1 -

zeigt eine perspektivische Darstellung eines erfindungsgemäßen Wellenzerkleinerers in Beladungsstellung,

Figur 2 -

zeigt den Wellenzerkleinerer in Vorbereitung einer Wartung,

Figur 3 -

zeigt eine Detailansicht der Figur 2,

Figur 4 -

zeigt den Kopplungsbereich von Antrieb und Zerkleinerungswellen,

Figur 5 -

zeigt den Kopplungsbereich von Zerkleinerungswellen und Wellenkoppelvorrichtung,

Figur 6 -

zeigt eine Detailansicht mit geöffneten Revisionsklappen und herausgezogenem Nachzerkleinerungswerkzeug,

Figur 7 -

zeigt ein Wartungsgestell zur Aufnahme von Zerkleinerungswellen,

Figur 8 -

zeigt einen Ausschnitt der auf dem Wartungsgestell liegenden Zerkleinerungswellen,

Figur 9 -

zeigt die Nachdrückeinrichtung in Nichtgebrauchsstellung, während sich die Seitenwand in der Wartungsstellung befindet.

The invention will be described below with reference to Figures 1 - 9 explained in more detail.

FIG. 1 -

shows a perspective view of a shaft shredder according to the invention in loading position,

FIG. 2 -

shows the shaft crusher in preparation for maintenance,

FIG. 3 -

shows a detailed view of FIG. 2 .

FIG. 4 -

shows the coupling area of drive and crushing shafts,

FIG. 5 -

shows the coupling region of crushing shafts and shaft coupling device,

FIG. 6 -

shows a detailed view with opened inspection flaps and pulled-out secondary comminution tool,

FIG. 7 -

shows a maintenance rack for receiving shredding shafts,

FIG. 8 -

shows a section of the lying on the maintenance rack shredding shafts,

FIG. 9

shows the Nachdrückeinrichtung in non-use position, while the side wall is in the maintenance position.

FIG. 1 shows a mobile shaft crusher 1 in the loading position. Evident is in this figure, the above the crushing unit 2 arranged material application area, which is formed within the side walls 4-7 of these. Below the side wall 5 and below the crushing shafts 8, 9 (not visible here) shredding unit 2, the inspection flaps 12, 13 are arranged. The side walls 4, 5, 6 are designed so that they can be folded outwardly for maintenance purposes P1, P2, P3. On the side wall 5 is the Nachdrückeinrichtung 3, which will be discussed in more detail below.

The material to be crushed is added to the material feed area, comminuted by the comminution unit 2 and collected below it. The shredded material is transported from there to the conveyor belt shown on the right side and transported away from it.

FIG. 2 shows the wave crusher 1 in preparation for maintenance. The side walls 4, 5, 6 are outwardly folded down and give the view of the two crushing shafts 8, 9 free. The side wall 7, which can be designed as a material slide or tilting funnel, can be moved by the comminution unit 2 via the machine housing in the X direction. FIG. 3 shows enlarged the crushing unit 2 of FIG. 2 , Between the folded or pushed away side walls 4, 5, 6, 7, the crushing shafts 8, 9, which are arranged here by way of example with the longitudinal axes parallel to each other, visible. In the axial direction, the area for comminution by shields 10, 11 is limited. The shield 10 is intended to prevent the material to be comminuted from reaching the area of the couplings which are located towards the shaft coupling device 14.

Likewise, the shield 11 is to prevent comminuted material from entering the flange area facing the drive. This area is in FIG. 4 shown. The crushing shafts 8, 9 are arranged with clutches 15, 16, in particular flange clutches, on the drive (not shown). The flange clutches 15, 16 are shielded by the shield 11 of the crushing region 2 of the crushing shafts 8, 9 so that no comminuted material can reach the flange couplings 15, 16. FIG. 5 shows the corresponding couplings 17, 18, in particular flange couplings, on the side of the shaft coupling device 14, where the shield 10 prevents the penetration of comminuted material into the area of the flange couplings 17, 18.

The flange clutches 15, 16, 17, 18 can be removed to remove the crushing shafts 8, 9 and then they can be removed immediately after loosening the screw in, relative to the axis of rotation, radial direction, in particular vertical. Thus, the removal of the crushing shafts 8, 9 can be accelerated without first a part of the drive or the storage of the crushing shafts 8, 9 must be dismantled.

FIG. 6 shows a portion of the crushing unit 2 with open inspection flaps 12, 13. In this case, the extract 20 is pulled down with the Nachzerkleinerungswerkzeug 19 thereon, which is arranged in the operating state below and between the crushing shafts 8, 9, lowered. In the Nachzerkleinerungswerkzeug 19 is in this embodiment, a breaker bar; but it can also be a different Nachzerkleinerungswerkzeug be present, such as a screen basket. In the illustrated embodiment, the drawer 20 is constructed with the post-shredding tool 19 so that it can be easily lifted out of the guides. On these guides can now in the FIG. 7 shown maintenance frame 21 are set. On the maintenance rack two pairs of trays 22, 23 are arranged.

For maintenance, the comminution shafts 8, 9 can be raised after loosening the flange couplings 15, 16, 17, 18. The maintenance frame 21 can be inserted into the shaft shredder 1 and positioned with the shelves 22, 23 under the crushing shafts 8, 9. Then it will the maintenance frame 21 raised and the crushing waves are on the shelves 22, 23 and are raised with the maintenance frame 21. Thus, the crushing shafts 8, 9 - as the FIG. 8 shows - be excavated from the crushing unit 2 and maintained. The crushing shafts 8, 9 are placed on the service frame 21 above the coupling position. In the detail shown, the end of the comminution shaft 9 with the flange coupling 16 rests on a support 22, as is the case with the comminution shaft 8 with the flange coupling 15 on the supports 23 (not shown). In the elevated position, the crushing shafts 8, 9 are easily accessible.

With such a wave shredder 1, the maintenance of the shredding unit 2 can be simplified and at the same time shortened, which reduces the maintenance costs.

FIG. 9 shows an embodiment of another inventive detail of the wave crusher 1, a Nachdrückeinrichtung 3. The Nachdrückeinrichtung 3 is disposed on one of the side walls, in the example shown here on the side wall 5. In the figure, the side wall 5 is shown in the maintenance position, it is folded outwards, whereby the inside of the side wall 5 facing outward and the crushing shaft 8 is more accessible. On the inner wall of the side wall 5, the pressing device 3 is arranged. In the example shown, the active part of the push-over device 3 is an elongate, cylindrical body whose cylinder axis is aligned parallel or at least approximately parallel to the axes of the comminution shafts 8, 9 is. Of course, another form of Nachdrückeinrichtung can be provided. It can also be provided several Nachdrückelemente that need not be elongated. The active part of the push-over device 3 is attached to a push-on lever 3a. The push-in lever 3a in turn is pivotally mounted on the side wall 5 via a pivoting element 3b.

In use, in which the side walls 4, 5, 6, 7, as in FIG. 1 shown, are folded up, on the one hand the Nachdrückeinrichtung 3 can be pivoted up to allow loading, or on the other hand, the active part of the Nachdrückeinrichtung 3 can be placed by the Verschwenkungselement 3b in a position above and between the crushing shafts 8, 9 so Crushing material to the crushing shafts 8, 9 to push out. For this purpose, the Nachdrückhebel 3a can be moved back and forth, resulting in a Nachstopfeffekt the Nachdrückeinrichtung 3. Preferably, this stuffing movement of the Nachdrückhebels 3a is hydraulically driven, because such drives are robust and can transmit high forces. However, it is also conceivable to design the drive electromechanically, magneto-mechanically, pneumatically or in another type of drive.

In order to protect the mechanism of Nachdrückeinrichtung 3 from contamination and thus damage, just the pivoting element 3b is here designed in the form of a circular disk or circular segment disc. In this case, the area of the pivoting element 3b, which is out of the side wall 5 protrudes into the material application area, both at the end faces, and disguised on the cylindrical surface, so that no material to be crushed can impair the function of Verschwenkungselements 3b.

Claims (16)

Shaft shredder (1) comprising a machine frame and a comminution unit (2) comprising at least one comminution shaft (8, 9) driven by a drive, wherein a material feed area is formed adjacent to the comminution unit (2), which has a plurality of side walls ( 4, 5, 6, 7),
characterized,
in that at least one of the side walls (4, 5, 6, 7), in particular at least one side wall (4, 7) arranged at the end side relative to the axial direction of the comminution shaft (8, 9), can be brought from a use position into a maintenance position, in particular foldable or displaceable , is trained. Shaft shredder (1) according to claim 1,
characterized,
that in the maintenance position bearing and / or coupling portions of the at least one crushing shaft (8, 9) are accessible. Shaft shredder (1) according to claim 2,
characterized,
in that the at least one comminuting shaft (8, 9) is formed by a releasable, positive coupling, in particular a screwable flange coupling (15, 16, 17, 18) at each end of the comminution shaft (8, 9) in a predominantly vertical direction out of the comminuting housing can be dismantled and the bearings of the waves remain on or in the crushing housing. Shaft shredder (1) according to one of the preceding claims,
characterized,
that a wall (7), (8, 9), tipping funnel (7) is formed of the material feed portion as in particular the drive of the comminuting shaft at least partially opaque. Shaft shredder (1) according to claims 3 and 4,
characterized,
in that a wall (7) designed in particular as a tilting funnel, in particular at least substantially horizontally, is movable, in particular displaceable, thereby releasing the space for the detachable, positive coupling (15, 16) for maintenance purposes. Shaft shredder (1) according to one of the preceding claims,
characterized,
in that one of the side walls (4) of the material feed area can be moved, in particular swiveled or displaced substantially horizontally, so that the space for the detachable, positive-fit coupling (17, 18) is released for maintenance purposes. Shaft shredder (1) according to one of the preceding claims,
characterized,
in that at least one post-shredding tool (19), in particular a breaking bar or sieve basket, is arranged below the at least one comminuting shaft (8, 9). Shaft shredder (1) according to claim 7,
characterized,
may be that the Nachzerkleinerungswerkzeug (19) are substantially raised or lowered in the vertical direction. Shaft shredder (1) according to one of claims 7 or 8,
characterized,
that the Nachzerkleinerungswerkzeug (19) from the Wellenzerkleinerer (1) can be moved out. Shaft shredder (1) according to one of the preceding claims,
characterized,
in that it comprises two comminution shafts (8, 9) which are arranged next to one another, in particular with axes of rotation arranged parallel to one another. Shaft shredder (1) with a machine frame and a comminution unit (2), which has at least one comminution shaft mounted thereon and driven by a drive (8, 9), wherein adjacent to the comminution unit (2) a material feed area is formed, which comprises a plurality of side walls (4, 5, 6, 7), wherein the wave comminutor (1) comprises two comminution shafts (8, 9), which are arranged side by side, in particular according to one of the preceding claims,
characterized,
that it comprises a, in particular driven, pressing device (3), which has a particularly elongated, in particular cylindrical, pressing element whose longitudinal axis preferably runs parallel to the axes of rotation of the comminution shafts (8, 9). Shaft shredder (1) according to claim 10 or 11,
characterized,
that the pressure backup (3) from a state of use in the field of comminution waves, in particular in the region between and / or can be brought above the comminuting shafts (8, 9) into a non-use state, in particular is pivotable. Shaft shredder (1) according to one of claims 10 to 12,
characterized,
that the pressure backup (3) on one of the side walls (4, 5, 6, 7), in particular pivotably, mounted. Shaft shredder (1) with a machine frame and a comminution unit (2), which comprises at least two comminution shafts (8, 9) driven by a drive, wherein a material feed area is formed adjacent to the comminution unit (2), in particular according to one of the preceding claims .
characterized,
in that the shaft crusher comprises a shaft coupling device (14) which is adapted to be moved by a synchronous mode in which the shredding shafts (8, 9) are moved in a defined rotational speed ratio in the opposite direction of rotation, and an asynchronous mode in which the shredding shafts (8 , 9) are moved with any direction of rotation and without defined speed ratio, can be switched. Shaft shredder (1) according to claim 14,
characterized,
in that the shaft coupling device has a displaceable or pivotable pinion in order to bring about the changeover from the synchronous mode into the asynchronous mode. Shaft shredder according to claim 14 or 15,
characterized,
in that it furthermore has a side of the comminuting shafts (8, 9) which is coupled or can be coupled to the comminution shafts (8, 9) and is arranged on the drive side or on the drive side, in particular Having the shaft coupling device comprehensive, transmission device.

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