An agricultural vehicle header having a frame, at least one support arm extending, a cutter assembly attached to the distal ends of the support arms, a draper belt with an upper belt portion located above the support arms, and a parallel linkage connected to each support arm to operatively connect the cutter assembly to the frame. The linkage includes upper and lower links. The upper belt portion extends along a cross-belt direction that is perpendicular to a travel direction of the upper belt portion, and the proximal pivots of the upper and lower links are positioned on a line that is oriented at an angle of 60 to 120 degrees relative to the cross-belt direction when the header is in a freestanding static state.

There are provided an engine controlling section for controlling a rotational speed of an engine, a horizontal posture controlling section for rendering a vehicle body frame to a horizontal posture by controlling a posture changing mechanism configured to change a posture of the vehicle body frame by an operation of an actuator utilizing power from the engine, a yield measuring section for measuring a yield of grains stored in a grain tank based on measurement result of a load cell configured to measure a weight of the grain tank, an activation operational tool for outputting an activation signal for activating yield measurement by the yield measuring section, and a yield controlling section configured to provide the engine controlling section with a high speed rotation instruction for driving the engine at a rated rotational speed in response to the activation signal and also to provide the horizontal posture controlling section with a horizontal posture instruction for rendering the vehicle body frame to the horizontal posture.

Windrow mergers employ one or more design features as described herein in connection with a suspension assembly that allows the pickup head to rise or fall relative to a frame of the merger. One feature maintains a substantially constant force or pressure between a pickup head of the merger and the terrain regardless of a height of the head. Another feature maintains a substantially constant hydraulic pressure in a hydraulic actuator that connects the pickup head to a frame assembly of the merger. Still another feature employs a hydraulic pump driven by a power takeoff (PTO) of the tractor to charge and discharge a hydraulic actuator arranged to raise and lower the pickup head of the merger between an upper limit and a lower limit.

A work vehicle includes a chassis, and a work implement movably coupled to the chassis, the work implement configured to perform a field-engaging function. The work vehicle also includes an actuator coupled to the work implement and configured to adjust a position of the work implement relative to a ground surface, and a controller in communication with a communication module. The controller is configured to monitor a location of the work machine via the communication module, and load a field map that identifies spatial information about a corresponding field, and a characteristic of the actuator associated with the spatial information. The controller is further configured to partition the spatial information into at least one pass traversable by the work machine. The controller is also configured to create an adjustment event to adjust the actuator in response to the location of the work machine moving within the at least one pass.

Windrow mergers employ one or more design features as described herein in connection with a suspension assembly that allows the pickup head to rise or fall relative to a frame of the merger. One feature maintains a substantially constant force or pressure between a pickup head of the merger and the terrain regardless of a height of the head. Another feature maintains a substantially constant hydraulic pressure in a hydraulic actuator that connects the pickup head to a frame assembly of the merger. Still another feature employs a hydraulic pump driven by a power takeoff (PTO) of the tractor to charge and discharge a hydraulic actuator arranged to raise and lower the pickup head of the merger between an upper limit and a lower limit.

An agricultural apparatus including an agricultural vehicle and a number of work units suitable for cutting a standing crop. The work units include a front work unit and two lateral work units located behind and to the sides of the front work unit, each of the work units depositing cut crop as a swath. Each of the lateral work units is supported from a central chassis by a hydraulic system. A plurality of sensors determine a speed of the agricultural vehicle, a speed of operation of each lateral work unit and a relief pressure in the hydraulic system of each lateral work unit. A control unit is configured to receive inputs from the plurality of sensors, compare the values for a desired vehicle speed or speed of operation of the mower unit and adjust the pressure relief in the hydraulic system based on this comparison. The inertia of the hydraulic control system can accordingly be compensated for and the work units are able to follow the terrain contour, resulting in an even cut.

A lateral tilt control system for an agriculture harvester may include first and second tilt cylinders coupled between a support structure and an implement of the harvester. The first tilt cylinder may include a first cap-side chamber and a first rod-side chamber and the second tilt cylinder may include a second cap-side chamber and a second rod-side chamber. The system may also include a first fluid line providing a flow path between the first cap-side chamber and the second cap-side chamber and a second fluid line providing a flow path between the first rod-side chamber and the second cap-side chamber. Additionally, the system may include a pressure relief valve coupled between the first and second fluid lines to allow fluid to be transferred between the first and second fluid lines when a fluid pressure within either fluid line exceed a relief pressure setting.

An agricultural vehicle header having a frame, at least one support arm extending, a cutter assembly attached to the distal ends of the support arms, a draper belt with an upper belt portion located above the support arms, and a parallel linkage connected to each support arm to operatively connect the cutter assembly to the frame. The linkage includes upper and lower links. The upper belt portion extends along a cross-belt direction that is perpendicular to a travel direction of the upper belt portion, and the proximal pivots of the upper and lower links are positioned on a line that is oriented at an angle of 60 to 120 degrees relative to the cross-belt direction when the header is in a freestanding static state.

A passive self-adjusting seat assembly for a lawn maintenance vehicle having a frame. The passive self-adjusting seat assembly includes a base, a guide assembly attached to the base, and a platform assembly that is selectively movable or slidable relative to the guide assembly in order to maintain an operator in an upright or substantially vertical orientation as the lawn maintenance vehicle traverses uneven or sloped ground. The seat assembly further including a locking assembly for selectively locking the sliding or movement of the platform assembly relative to the guide assembly.

A grass trimmer includes an operating device configured for a user to operate and a grass trimmer device including a grass trimmer head and a motor. The grass trimmer head includes a spool configured for a grass trimmer line to wind around and a housing formed with an accommodating cavity. When the grass trimmer is mounted with the grass trimmer line, a part of the grass trimmer line protruding outside the housing is defined as an effective part of the grass trimmer line. The grass trimmer further includes a controller configured to control the grass trimmer head to release a grass trimmer line when the grass trimmer head is mounted with the grass trimmer line and a length of the effective part is detected to be less than or equal to a preset value.