Abstract: An autonomous industrial truck, in particular an order-picking industrial truck, including an undercarriage to support the industrial truck on a roadway. The undercarriage is located on an undercarriage chassis and the industrial truck has a supporting chassis that is provided with supporting means. The supporting chassis can be adjusted relative to the undercarriage chassis between a raised position in which the supporting means are raised from the roadway and a lowered position in which the supporting means are lowered onto the roadway.

Abstract: A lifting mast of an industrial truck includes two vertical rails at a distance from each other that are connected with one another by two cross members, wherein the lifting mast, to raise and lower a lifting carriage on the vertical rails, is provided with a lifting cylinder device which is supported on the bottom cross member, wherein the lifting cylinder device is in an operational connection with a lifting arrangement that is fastened with a first end to the lifting carriage, is fastened with a second end to the lifting mast, and is reversed on the lifting cylinder device. The second end of the lifting arrangement is fastened to the bottom cross member, or the lifting arrangement is fastened with the second end to the additional cross member, wherein at least one traction device that transmits a tractive force connects the additional cross member with the bottom cross member.

Abstract: A lifting mast of an industrial truck includes two vertical rails at a distance from each other that are connected with one another by two cross members, wherein the lifting mast, to raise and lower a lifting carriage on the vertical rails, is provided with a lifting cylinder device which is supported on the bottom cross member, wherein the lifting cylinder device is in an operational connection with a lifting arrangement that is fastened with a first end to the lifting carriage, is fastened with a second end to the lifting mast, and is reversed on the lifting cylinder device. The second end of the lifting arrangement is fastened to the bottom cross member, or the lifting arrangement is fastened with the second end to the additional cross member, wherein at least one traction device that transmits a tractive force connects the additional cross member with the bottom cross member.

Abstract: A lifting mast of an industrial truck includes a load handling arrangement that can be raised and lowered and two vertical rails at a lateral distance from one another that are connected to one another by at least one cross member. The cross member is X-shaped and includes a central area located between the vertical rails and braces that extend in an X-shape from the central area to the vertical rails and are fastened to the vertical rails. Between the central area and two pairs of braces that extend to one of the two vertical rails there are respective see-through openings that extend to one of the two vertical rails.

Abstract: A lifting device of an industrial truck includes a load handling arrangement that is raised and lowered on a lifting frame and a hydraulic lift cylinder device that is actuated by an electrically actuatable control valve device, in which an electronic control device is provided to actuate the control valve device. The electronic control device has an automated set-down mode actuated during a lowering of the load handling arrangement. The load is lowered at a lowering speed specified by a deflection of a control element to the designated surface. As the control element continues to be deflected into the lowering position, the lowering of the load handling arrangement is terminated by the electronic control device by actuating the control valve device into a shut-off position to prevent the load handling arrangement from being set down on the designated surface.

Abstract: A forklift truck with a forward-tilting cab and a method for reducing the container-loading height of the forklift truck, include a cab and a frame, the cab being connected to the frame so as to be able to tilt forward; and also including a locating mechanism, which is removably provided between the cab and frame when the cab is tilted forward to reduce the cab height, so as to locate the cab when the cab is tilted forward to a preset angle. When loading into a container, the cab of the forklift truck is tilted forward to a preset angle, so that the overall height of the forklift truck is reduced to a height suitable for loading in a container, and the locating mechanism is used to locate the cab, so that the cab is kept in a state in which it is tilted forward to a preset angle.

Abstract: A driver assist device is described for an industrial truck (1) with at least one steered wheel (21) at the rear end of the truck. The driver assist device is located on the industrial truck (1) and projects a lighting effect on the roadway (13). The lighting effect marks a peripheral path (12) of the external periphery (14) of the rear end (15) of the truck on the roadway (13) for a selected steering angle as the industrial truck travels in a curve.

Abstract: A driver assist device is provided for an industrial truck (1) that has a load handling device (5). The driver assist device, when located on the industrial truck (1), projects a lighting effect onto the roadway (13). The lighting effect forms a position marking (12) of the load handling device (5) on the roadway (13) which will be reached by the load handling device (5) for a particular steering angle after the industrial truck (1) travels around a curve by a defined curve angle.

Abstract: This invention relates to a drive train (1) of a mobile vehicle with an internal combustion engine (2) and a load device (3) driven by the internal combustion engine (2). The internal combustion engine (2) is controlled by an electronic engine control unit (4) and the load device (3) is controlled by an electronic control unit (5). A low idle speed (nuL) for the operation of the internal combustion engine at no load is stored in the engine control unit (4). The electronic control unit (5) detects a pause in the operation of the load device (3) and transmits a speed setpoint (nStandby) for standby operation of the internal combustion engine to the engine control unit (4) to operate the internal combustion engine (2) at idle during a pause in operation at the speed setpoint (nStandby), which is below the low idle speed (nuL) for standby operation.

Abstract: A driver assist device is provided for an industrial truck (1) that has a load handling device (5). The driver assist device, when located on the industrial truck (1), projects a lighting effect onto the roadway (13). The lighting effect forms a position marking (12) of the load handling device (5) on the roadway (13) which will be reached by the load handling device (5) for a particular steering angle after the industrial truck (1) travels around a curve by a defined curve angle.

Abstract: A driver assist device is described for an industrial truck (1) with at least one steered wheel (21) at the rear end of the truck. The driver assist device is located on the industrial truck (1) and projects a lighting effect on the roadway (13). The lighting effect marks a peripheral path (12) of the external periphery (14) of the rear end (15) of the truck on the roadway (13) for a selected steering angle as the industrial truck travels in a curve.

Abstract: A fork-lift truck has a battery-electric drive system, a driver's stand (10) having a driver's platform (11) for a standing operator formed between a load part (1) and a drive part (5) having a counterweight. The counterweight is formed by a battery pack device having at least one battery pack (9). The driver's stand (10) extends over the entire vehicle width. In this case, the drive part (5) has an equipment area (6), the battery pack device being arranged in a battery compartment (8), which is arranged above and/or adjacent to the equipment area (6), of the drive part (5).

Abstract: This invention relates to a component surface (side section 1a), in particular a vehicle surface, with a three-dimensional surface texture. This invention further relates to a method for the creation of a component surface (side section 1a), in particular a vehicle surface, with a three-dimensional surface texture. To keep the effort and expense required for the achievement of a three-dimensional surface texture low, the invention teaches that a film is glued to the component surface (side section 1a), which film has been provided prior to the gluing with a plurality of coats of paint, each using the screen printing process, which in their totality form a three-dimensional surface texture.

Abstract: A hydrostatic drive system includes a user in the form of a differential cylinder connected in a closed circuit to a high-pressure pump. A piston-side compression chamber and a piston-rod-side compression chamber of the differential cylinder are in communication with the high-pressure pump. The closed circuit includes a protection device having first and second protection valve devices that each includes a pressure relief valve and an anti-cavitation valve. The pressure relief valve of the first protection valve device is provided with an override device, by means of which the opening pressure of the pressure relief valve can be varied. When the high-pressure pump delivers into the piston-rod-side compression chamber, the pressure relief valve of the first protection valve device is adjusted by means of the override device to a reduced opening pressure and the differential volumetric flow flows out via the pressure relief valve to a low-pressure system.

Abstract: A drive train of a vehicle has a drive motor and a traction drive driven by the drive motor. A hydraulic work system has at least one hydraulic pump driven by the drive motor. To deliver torque into the drive train and/or to absorb torque from the drive train, the drive train is provided with an additional hydraulic machine which can be placed in communication with a hydraulic pressure accumulator and/or a tank and can be operated as a pump and a motor in the same direction of rotation. The hydraulic machine has an inlet connection and an outlet connection and a switching valve device is provided to control the connection of the inlet connection and the outlet connection with the pressure accumulator or the tank.

Abstract: A hydrostatic axial piston machine, in particular a swashplate machine, has a cylinder drum (3) mounted so that it can rotate around an axis of rotation (2). The cylinder drum (3) is provided with cylinder bores (4), in each of which a piston (5) is mounted so that it can be displaced longitudinally. The cylinder drum (3) is axially supported on a control surface (8) affixed to the casing and on which an inlet connection (10) and an outlet connection (11) are realized. The cylinder bores (4) can each be placed in communication by a connecting channel (12) with the control surface (8). The connecting channel (12) is provided with a cross-section that increases from the cylinder bore (4) toward the control surface (8).

Abstract: A hydromechanical transmission has a hydraulic pump-driven hydraulic motor of a hydrostatic continuously variable transmission and a mechanical multi-step variable speed transmission connected to a drive shaft of the hydraulic motor, which can be shifted into operation by a gear shifting device. In order to adapt the hydromechanical transmission with as compact as possible a design to diverse installation cases with little effort, the gear shifting device is arranged directly adjacent to the hydraulic motor and is consolidated with the latter into a preassembled constructional unit.

Abstract: An industrial truck has a vehicle frame (1), a lifting framework (4) attached to the vehicle frame (1) and two wheel arms which extend in the horizontal direction. The wheel arm is connected to the vehicle frame (1) and at the free end of which at least one running wheel (3) is arranged. Each wheel arm has a first longitudinal structural part (2) which is a component of the vehicle frame (1) and has a second longitudinal structural part (5) which is a component of the lifting framework (4). The running wheel (3) is arranged on the first longitudinal structural part (2).

Abstract: A hydrostatic pump (1) with a variable displacement volume can be operated in a closed circuit and is driven by a drive engine (2), in particular by an internal combustion engine. To control the displacement of the pump (1), a control device (4) is provided which can be actuated as a function of the speed-dependent control pressure which is a function of the speed of the drive engine (2). To improve the control characteristics of the pump, a switchover device (35) is provided, by which the pump (1) can be switched between a speed-dependent displacement control by the speed-dependent control pressure and a volume flow-dependent delivery control, in which the control device (4) of the pump (1) can be controlled as a function of the actuation of an actuator mechanism (28).

Abstract: A hydrostatic pump (1) has a mechanical displacement volume control with a mechanical control element (4), which for generation of an actuator pressure that acts on a positioning piston (5) which is functionally connected with a displacement setting device (3), has a position-controlled control valve (6) functionally connected with a control lever (30) and with the displacement setting device (3) of the pump (1). A pump with a mechanical displacement volume control with a pressure limiting function can be accomplished by mechanically decoupling the control lever (30) from the displacement setting device (3) whereby a pressure cutoff function is provided, with which, by respective pilot valves (21a, 21b), a pressure signal can be generated from a delivery line (2a, 2b) of the pump (1), which signal is transmitted via the control valve (6) to the positioning piston (5) and counteracts the control pressure.