Hamm Ag

Ronny Pieske

Thomas Henker

Andreas Röhr

Thomas Klein

Stefan Braunschläger

Josef Dagner

Axel Roemer

Andreas Roehr

Markus Golbs

Michael Sperber

Dieter Stoecklein

Holger Wolfrum

A soil processing machine, in particular a soil compactor, comprises a machine frame and a casing () carried on the machine frame and/or at least partially providing it and bounding a unit receptacle space (), wherein the casing () has a cooling air inlet area () and a cooling air outlet area () for cooling air flowing through the unit receptacle space (), wherein a plurality of units around which cooling air can flow through the unit receptacle space () from the cooling air inlet area () to the cooling air outlet area () are arranged in the unit receptacle space (), wherein at least two of the units arranged in the unit receptacle space () have maximum permissible operating temperatures different from one another and at least one unit having higher maximum permissible operating temperature is arranged upstream in a cooling air flow direction from the cooling air inlet area () to the cooling air outlet area () with respect to at least one unit having lower maximum permissible operating temperature.

Soil processing machine

A soil processing machine, in particular a soil compactor, includes at least one drive roller and an electrohydraulic drive system for driving at least one drive roller. The drive system has a traction hydraulic circuit having at least one hydraulic motor and at least one hydraulic pump. The circuit includes a first line region between a first connection fitting of the at least one hydraulic pump and a first connection fitting of each hydraulic motor to drive the at least one drive roller in a first rotatable direction and a second line region between a second connection fitting of the at least one hydraulic pump and a second connection fitting of each hydraulic motor to drive the at least one drive roller in a second, opposite rotatable direction. A valve assembly is provided with each line region for selectively interrupting and releasing a fluid flow connection between the at least one hydraulic pump and at least one hydraulic motor.

Soil processing machine and method for operating a soil processing machine

A soil processing machine includes a hydraulic drive system including an electrohydraulic pressurized fluid source with at least one electric motor and at least one hydraulic drive pump, a hydraulic drive circuit fed with pressurized fluid by the at least one hydraulic drive pump, at least one hydraulic drive motor fed with pressurized fluid from the hydraulic drive circuit, and a discharge valve assembly for discharging fluid from the hydraulic drive circuit to a fluid reservoir. The hydraulic drive system is designed to operate the discharge valve assembly as a function of at least one of the following parameters: a temperature of the fluid in the hydraulic drive circuit, an ambient temperature, a viscosity of the fluid in the hydraulic drive circuit, a degree of contamination of the fluid in the hydraulic drive circuit, a period of time since the last start-up of the hydraulic drive system, a period of time since the last fluid was discharged from the hydraulic drive circuit.

A fastening device for hoses including two fastening parts two fastening parts adapted to be joined with each other and each having at least one recess which, in the joined state of the fastening parts, form at least one passage for at least one hose. The fastening parts are each formed by a fastening body with an elastic fastening component, wherein the fastening body has a lower elasticity than the elastic fastening component. The elastic fastening component respectively forms a recess surface in the recess. The elastic fastening component is molded to the fastening body to form a chemical bond with the same.

Fastening device for hoses

A drive system, in particular for a self-propelled construction machine, in particular a soil compactor, comprising an internal combustion engine comprising a drive unit, at least one hydraulic circuit with a hydraulic pump that can be driven by the drive unit, as well as a hydraulic-drive support unit with a hydraulic pump/motor assembly and at least one pressure fluid reservoir, wherein the hydraulic pump/motor assembly is or can be drivingly coupled with the drive unit or/and at least one hydraulic circuit, wherein the hydraulic pump/motor assembly can be operated in a charging operating mode by the drive unit or/and at least one hydraulic circuit as a pump to charge at least one pressure fluid reservoir and be operated in an drive support operating mode as a motor to provide a drive support torque for the hydraulic pump of at least one hydraulic circuit, characterized in that the hydraulic pump/motor assembly can be operated in a recirculation operating mode as a motor to start the drive unit.

Drive system, in particular for a self-propelled construction machine, in particular a soil compactor

A drive system, in particular for a self-propelled construction machine, in particular a soil compactor, comprises a drive unit, at least one hydraulic circuit with a hydraulic pump driven by the drive unit, a hydraulic drive support unit with a hydraulic pump/motor assembly, and at least one pressure fluid reservoir, wherein the hydraulic pump/motor assembly is, or can be, drivingly coupled with the drive unit and/or at least one hydraulic circuit, wherein the hydraulic pump/motor assembly can be operated in a charging operating mode by the drive unit and/or at least one hydraulic circuit as a pump to charge at least one pressure fluid reservoir, and be driven in a drive support operating mode as a motor to provide a drive support torque for the hydraulic pump of at least one hydraulic circuit, characterized in that the hydraulic pump/motor assembly is operated in a recirculation operating mode as a pump to convey fluid out of a fluid reservoir and into a fluid reservoir.

A drive system, in particular for a self-propelled construction machine, especially a soil compactor, comprising a drive unit, at least one hydraulic circuit with a hydraulic pump drivable by the drive unit, as well as a hydraulic drive support unit with a hydraulic pump/motor assembly and at least one compressed fluid reservoir, wherein the hydraulic pump/motor assembly is, or can be, drivingly coupled to the drive unit and/or to at least one hydraulic circuit, wherein the hydraulic pump/motor assembly can be operated in a charging operating mode as a pump by means of the drive unit and/or by means of at least one hydraulic circuit for charging at least one compressed fluid reservoir, and which is drivable in a drive support state as a motor to provide a drive support torque for the hydraulic pump of at least one hydraulic circuit, is characterized in that a maximum drive torque provided by the drive unit is smaller than a maximum request torque to be applied for operating at least one hydraulic circuit.

Drive system, in particular for a self-propelled construction machine, especially a soil compactor

A self-propelled compaction roller comprises a drive system having a drive assembly, a hydrostatic/mechanical transmission arrangement with a hydraulic pump, which can be driven by a primary drive of the drive assembly, and with a hydraulic motor, further having a supporting drive arrangement having a charging/driving unit and an energy storage unit, wherein the charging/driving unit can be operated in a charging mode for storing energy in the energy storage unit and can be operated in a supporting mode by withdrawing energy from the energy storage unit in order to provide a supporting torque, wherein the charging/driving unit is coupled to a power take-off of the drive assembly.

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Zwönitz, Germany

Ronny Pieske