A harvesting header includes a header frame, rotary cutters carried by the header frame, a gearbox containing at least one gear coupled to each rotary cutter, and an electronic sensor to indicate an amount of oil in the gearbox. Each rotary cutter has a rotating disc with at least one blade for cutting crops. An agricultural vehicle includes a vehicle frame, at least one attached to the vehicle frame, and a harvesting header coupled to the vehicle frame by a plurality of hydraulic cylinders. A method of operating an agricultural vehicle includes adjusting at least one hydraulic cylinder to move a header frame to a known orientation, sensing a position of an oil surface in a gearbox, and determining or indicating an amount of oil in the gearbox based at least in part on the position of the oil surface.

A lubrication arrangement includes at least one housing, at least one shaft, at least one bearing system configured to hold the at least one shaft in the at least one housing and to permit the at least one shaft to rotate, lubricant distributed in the at least one housing with the rotation of the at least one shaft, and a lubricant deflector provided in a stationary manner relative to the at least one housing above the at least one shaft. The lubricant strikes against the lubricant deflector and, by action of gravity, the lubricant is conducted to the at least one bearing system of the at least one shaft so that the at least one bearing system is supplied with the lubricant.

A concave section for a harvester includes a concave body having an upstream side, a downstream side, a leading end and a trailing end. The concave body defines an arcuate crop engagement face facing radially inwardly. A plurality of crop passage openings are defined through the arcuate crop engagement face. A cover is configured to at least partially cover at least some of the crop passage openings. The cover is carried by the concave body and is movable thereon between at least two different positions to adjust a degree of openness of at least some of the crop passage openings.

A flexible and rotatable coupling assembly for a feeder conveyor of a combine harvester, for example. The coupling assembly connects a first rotatable shaft to a second rotatable shaft. The coupling assembly includes a spherical bearing that is connectable to the first rotatable shaft for accommodating a radial or angular misalignment between the first and second rotatable shafts; and a flexible and rotatable coupler that is non-rotatably connectable to the first and second rotatable shafts for transferring rotation between the first and second rotatable shafts. The flexible and rotatable coupler is either directly or indirectly connected to the spherical bearing. The flexible and rotatable coupler has a flexible component for accommodating the radial or angular misalignment.

A flexible and rotatable coupling assembly for a feeder conveyor of a combine harvester, for example. The coupling assembly connects a first rotatable shaft to a second rotatable shaft. The coupling assembly includes a spherical bearing that is connectable to the first rotatable shaft for accommodating a radial or angular misalignment between the first and second rotatable shafts; and a flexible and rotatable coupler that is non-rotatably connectable to the first and second rotatable shafts for transferring rotation between the first and second rotatable shafts. The flexible and rotatable coupler is either directly or indirectly connected to the spherical bearing. The flexible and rotatable coupler has a flexible component for accommodating the radial or angular misalignment.

In an electric grass cutting machine relating to the present invention, an electric motor for driving a traveling device having a pair of left and right front wheels and a pair of left and right rear wheels and a gear transmission for speed-changing output from the electric motor and transmitting the resultant power to the traveling device are disposed between the left and right rear wheels and arranged one after the other in the front/rear direction at positions laterally of a conveying duct for guiding cut grass pieces from a rear discharge type mower device to a grass collecting container supported to a rear portion of a machine body frame.

A self-propelled work apparatus, especially a lawnmower, includes a chassis, at least one tool and a drive motor for driving the tool. The tool is height-adjustable with respect to the chassis. A setting unit is provided to set the relative position of the tool with respect to the chassis. The setting unit includes an actuating motor and a setting gear. The setting gear rotates by less than one full revolution between a first, lower end position of the tool and a second, upper end position of the tool. A detection device is provided to detect the height position of the tool. The detection device includes encoding elements on the setting gear and at least one detector. The at least one first encoding element for the first end position differs from the at least one second encoding element for the second end position.

A self-propelled work apparatus, especially a lawnmower, includes a chassis, at least one tool and a drive motor for driving the tool. The tool is height-adjustable with respect to the chassis. A setting unit is provided to set the relative position of the tool with respect to the chassis. The setting unit includes an actuating motor and a setting gear. The setting gear rotates by less than one full revolution between a first, lower end position of the tool and a second, upper end position of the tool. A detection device is provided to detect the height position of the tool. The detection device includes encoding elements on the setting gear and at least one detector. The at least one first encoding element for the first end position differs from the at least one second encoding element for the second end position.

The invention provides a lawn mower, which comprises a driving assembly, an impact protection assembly, a transmission assembly and a cutting assembly. The driving assembly comprises a motor. The impact protection assembly comprises a pressing member and an elastic piece. The pressing member presses the elastic piece towards the transmission assembly to drive the transmission assembly and the cutting assembly to synchronously rotate with the motor shaft. When the resistance of the cutting assembly is greater than a predetermined value, A relative rotation is generated between the transmission assembly and the motor shaft. According to the lawn mower, the impact protection assembly is arranged between the driving assembly and the transmission assembly, when the reaction force upon the cutting assembly from external obstacles is greater than the friction force of the impact protection assembly, the transmission assembly and the motor shaft rotate relatively, and the transmission assembly is protected.

The invention provides a lawn mower, which comprises a driving assembly, an impact protection assembly, a transmission assembly and a cutting assembly. The driving assembly comprises a motor. The impact protection assembly comprises a pressing member and an elastic piece. The pressing member presses the elastic piece towards the transmission assembly to drive the transmission assembly and the cutting assembly to synchronously rotate with the motor shaft. When the resistance of the cutting assembly is greater than a predetermined value, A relative rotation is generated between the transmission assembly and the motor shaft. According to the lawn mower, the impact protection assembly is arranged between the driving assembly and the transmission assembly, when the reaction force upon the cutting assembly from external obstacles is greater than the friction force of the impact protection assembly, the transmission assembly and the motor shaft rotate relatively, and the transmission assembly is protected.