Wirtgen Gmbh

Markus Frankemölle

Christian Berning

Thomas Lehnert

Karsten Buhr

Andreas Salz

Hardy Wilhelmi

Cyrus Barimani

Roland Lull

Ronald Lull

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

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.

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.

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

An actuating unit for locking a component of a construction machine, in particular a road milling machine or a surface miner, the actuating unit comprising a retaining part for fastening to the construction machine. A self-propelled construction machine, in particular a road milling machine or a surface miner, comprising at least one actuating unit of this type. The basic principle of the actuating unit is the design of the cylinder of a piston/cylinder arrangement as a 'locking bolt'. In the actuating unit, a piston is connected to the retaining part and is surrounded by a cylinder, with a first cylinder chamber being formed on one side of the piston and a second cylinder chamber being formed on the other side of the piston. A cut-out which extends in the direction of the longitudinal axis of the cylinder and through which the retaining part extends is provided in the cylindrical wall of the cylinder. If one of the two cylinder chambers is supplied with a fluid, the cylinder moves to one side or the other, while the retaining part remains stationary. Therefore, the cylinder constitutes a 'locking bolt', which can be pushed forward or pulled back.

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Hennef, Germany

Markus Frankemölle