Wirtgen Gmbh

Betek Gmbh & Co. Kg

Karsten Buhr

Thomas Lehnert

Cyrus Barimani

Guenter Haehn

Günter Hähn

Karl Kammerer

Markus Roth

Stefan Abresch

Andreas Salz

Hardy Wilhelmi

Bernhard Diessner

Christian Berning

Martin Lenz

Markus Frankemölle

Andreas Jost

Peter Busley

Thomas Mannebach

Heiko Friederichs

Sascha Spöth

Sebastian Hofrath

Bernhard Diesner

Ulrich Krämer

Thomas Allgaier

An earth working machine includes a machine frame, a drive configuration and a milling drum. A bearing stem is attached to one of the drive configuration and the milling drum, the bearing stem protruding in a first direction to a first axial end, the bearing stem having an outer surface including at least first and second cylindrical bearing surfaces axially spaced from each other, a furthest one of the cylindrical bearing surfaces from the drive axial end having a smaller diameter than a next furthest one of the cylindrical bearing surfaces from the drive axial end. A non-locating bearing is connected to the machine frame and configured to receive the first and second cylindrical bearing surfaces of the bearing stem.

Earth working machine having a rotatable working apparatus axially positionally retainable with high tightening torque by means of a central bolt arrangement, and method for establishing and releasing such retention

An earth working machine includes a support structure and a working assembly mounted on the support structure so as to be rotatable about a drive axis. An assembly-side bearing configuration is connected to the working assembly and a structure-side bearing configuration is connected to the support structure. The assembly-side bearing configuration includes a driver configuration having a driver surface facing in a first circumferential direction and the structure-side bearing configuration includes a driver counterpart configuration having a driver counterpart surface facing in a second circumferential direction opposite to the first, the movement spaces of the driver surface and of the driver counterpart surface about the drive axis overlapping one another.

Earth working machine having a positive connection between the rotating working assembly and its rotary bearing

A bearing component for mounting a replaceable milling drum on an earth working machine includes an annular connecting flange having a central axis. A bearing stem protrudes from the connecting flange axially in a first direction to a first axial end, the bearing stem having an outer surface including at least first and second cylindrical bearing surfaces axially spaced from each other. The bearing stem further includes a centering recess open at a second axial end opposite the first axial end, the centering recess including an opening angle decreasing in steps so that the centering recess tapers in the first direction, the centering recess forming a portion of the central opening.

Chisel holder

A replaceable milling drum for an earth working machine includes a milling drum tube and a protrusion structure fixed to the milling drum tube. A bearing stem protrudes from the protrusion structure axially away from a drive axial end of the milling drum tube. The bearing stem has an outer surface including at least first and second cylindrical bearing surfaces axially spaced from each other, a furthest one of the cylindrical bearing surfaces from the drive axial end having a smaller diameter than a next furthest one of the cylindrical bearing surfaces from the drive axial end, the bearing stem having a central opening therethrough co-axial with the drive axis.

The invention relates to an interchangeable chisel holder () which can be fixed to a milling drum () of a ground-working machine (), having a forward chisel holder () for the interchangeable holding of a forward chisel (), preferably a round-shaft chisel, and having a rearward chisel (), which is held on the interchangeable chisel holder (), wherein, as based on a working movement () of the interchangeable chisel holder () when used in the ground-working machine (), the rearward chisel () is arranged behind the forward chisel holder (). In such an interchangeable candleholder () provision can be made, according to the invention, for the rearward chisel () to be held on the interchangeable chisel holder () axially and fixed in the circumferential direction of the chisel holder. Maintenance-induced stoppages of the ground-working machine can thus be reduced and the loss of chisels can at least be lowered.

Interchangeable chisel holder

The invention relates to a tool combination consisting of a chisel holder, which can be fastened to a milling drum of a soil tillage machine, and at least one leading and one trailing chisel, which are retained on the chisel holder, wherein the trailing chisel is arranged after the leading chisel, based on a working movement of the tool combination in use in the soil tillage machine, and wherein each chisel has a chisel tip having a cutter. According to the invention the trailing chisel tip of the trailing chisel has, at least in some areas, a greater hardness than the leading chisel tip of the leading chisel. Thus stoppage times of the soil tillage machine for maintenance can be reduced and the loss of chisels can at least be decreased.

Tool combination having a chisel holder and two chisels

The invention relates to a cutting device for an earth working machine, having improved wear protection.

Cutting device

An earth working machine includes a drive configuration and a working apparatus releasably connected together by a bolt component. A bolting moment bracing arrangement is connected or connectable in bolting moment-transferring fashion to the bolt component, and includes a bracing region that is embodied for bolting moment-bracing abutment in a bracing bolting direction against a counterpart bracing region, the drive configuration being embodied to be driven to rotate, in a rotation direction codirectional with the bracing bolting direction, while the bracing region is in abutment against the counterpart bracing region.

An earth working machine () includes a machine body () having a machine frame () and a drive configuration (), rotationally drivable relative to the machine frame () around a drive axis (A), to which configuration a working apparatus () embodied for earth working is releasably connected in torque-transferring fashion, in an operating position operational for earth working, for rotation together around the drive axis (A), such that when the connection is released, the working apparatus () is removable from the operating position in an axial direction relative to the drive configuration () for deinstallation from the drive configuration () and, for installation on the drive configuration, is conveyable into the operating position in an axial direction relative to the drive configuration ().

Earth working machine whose rotatable working apparatus, for installation on the machine, is conveyable into its operating position using an onboard actuator

An earth working machine () includes a machine body () having a machine frame () and a drive configuration (), rotationally drivable relative to the machine frame (), and to which configuration a working apparatus () embodied for earth working is releasably connected in torque-transferring fashion, in an operating position, for rotation together around a drive axis (A), such that when the connection is released, the working apparatus () is removable from the operating position in an axial direction relative to the drive configuration () for deinstallation from the drive configuration () and, for installation on the drive configuration (), is conveyable into the operating position in an axial direction relative to the drive configuration (), an actuator () being provided which is embodied to move the working apparatus () out of the operating position when the connection is released.

Earth working machine whose working apparatus is displaceable out of its operating position using an onboard actuator

The invention relates to an ejector unit, in particular for a road milling machine, having an ejector that is replaceably mounted on a carrier. In one aspect the ejector is curved in a scoop-like fashion. In another aspect the ejector is reversible upon the carrier to allow the ejector to be reversed after one wear surface is worn, thus presenting a new second wear surface.

Ejector unit for a road milling machine or the like

The invention relates to a bit holder having an insertion projection and having a holding projection having a bit receptacle, the insertion projection comprising a bearing segment and the holding projection comprising a supporting segment. In order to allow the bit holder to be braced in permanent and stable fashion with respect to a base part, provision is made according to the present invention that the supporting segment and/or the bearing segment comprise two supporting surfaces and bearing surfaces, respectively, arranged at an angle to one another; and that the longitudinal center axis of the bit receptacle and the longitudinal axis of the insertion projection enclose an obtuse angle.

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Willroth, Germany

Karsten Buhr