The adjustable hitch assembly of the present invention is mounted to the 3 point hitch system or quick attach frame on the rear of a tractor, and allows equipment, tools and implements to be hitched thereto. The hitch assembly includes a frame for mounting to the tractor, a carriage slidably mounted to the frame, and a hitch plate extending rearwardly from the carriage. The hitch assembly also includes an actuator for adjusting the lateral position of the hitch plate relative to the tractor. The actuator is coupled to the hydraulic system of the tractor. The actuator can be controlled remotely from the cab of the tractor.

A working machine includes a machine body, a lifting device to link a working device to the machine body, the lifting device being capable of moving up and down with the working device between a grounding state in which the working device is in contact with a ground and an ungrounding state in which the working device is out of contact with the ground, and an automatic travel controller to cause the machine body to perform automatic travel according to a planned travel route. The automatic travel controller includes a lifting controller to control the lifting device to move up with the working device from the grounding state to the ungrounding state, and cause the machine body to turn or travel rearward after the lifting controller controls the lifting device to move up with the working device from the grounding state to the ungrounding state.

An implement operating apparatus has a U-shaped drive frame supported on drive wheels, each pivotally mounted about a vertical wheel pivot axis. A steering control selectively pivots each drive wheel. A power source is connected through a drive control to rotate the drive wheels in either direction. First and second implements are configured to perform implement operations and to rest on the ground and when the drive frame is maneuvered to an implement loading position with respect to each implement, the implement is connectable to the drive frame and movable to an operating position supported by the drive frame. When the implement is in the operating position, the steering and drive controls are operative to move and steer the drive frame and implement along a first travel path or a second travel path oriented generally perpendicular to the first travel path.

Disclosed are an implement descending stability control method and system and a tractor. An outlet of a main pump is communicated with an inlet of a main overflow valve, an inlet of a constant-difference overflow valve and an inlet of an implement control valve. An oil outlet of the implement control valve is connected with a spring cavity of the constant-difference overflow valve through a steady-state throttle valve and is communicated with an inlet of a switching valve. An oil outlet of the switching valve is connected with a rodless cavity of a suspension cylinder in a suspension mechanism, and the rodless cavity of the suspension cylinder is communicated with an inlet of a descending valve. A rod cavity of the suspension cylinder is connected with an inlet of a secondary overflow valve.

The electric tractor is equipped with a battery, a transmission unit, a machine body frame, a rear axle unit, and a front axle unit. The transmission unit shifts the input power and outputs the shifted input power. The machine body frame is fixed to the transmission unit. The rear axle unit supports the rear wheels, and transmits, to the rear wheels, the power output from the transmission unit. The front axle unit supports the front wheels. The rear axle unit and the front axle unit support chassis including the machine body frame and transmission unit. The battery is supported by the chassis.

Disclosed herein is a hydraulic circuit for an agricultural tractor. The hydraulic circuit includes: a hydraulic pump configured to supply hydraulic oil; a horizontal control cylinder configured to control the horizontality of a working machine for a work target surface by using a flow output from the hydraulic pump; a horizontal control valve disposed between the hydraulic pump and the horizontal control cylinder, and configured to control the operation of the horizontal control cylinder; a lifting control valve configured to control the operation of a lifting control cylinder that controls the height of the working machine for the work target surface; a lifting connection valve disposed between the hydraulic pump and the lifting control valve, and configured to selectively connect and block a flow path between the hydraulic pump and the lifting control valve; and a basic hydraulic line forming flow paths.

An agricultural machine includes a controller disposed in communication with a work implement, an output, and an input. Left and right float cylinders are attached to and interconnected with a frame and left and right connecting arms. A desired operating condition from a plurality of predefined settings is then solicited from an operator via the input, wherein the desired operating condition corresponds to a designated pressure setting of the left and right float cylinders. The work implement is operated in a float mode of operation and then commanded to a raised position. The controller automatically determines a maximum pressure and a position that the maximum pressure corresponds to for the left and right float cylinders. The controller automatically modifies the designated pressure setting of the left and right float cylinders in the database based on the maximum pressure and position for each of the left and right float cylinders.

A system includes a tractor comprising a lifting hitch, and an implement comprising an implement frame carried by the lifting hitch. The implement frame has an integrated elongate toolbar carrying at least one row unit. A sensor is configured to sense a position of the at least one row unit relative to the ground. A control system is configured to receive a signal related to the sensed position of the at least one row unit relative to the ground and cause the lifting hitch to raise or lower a portion of the implement frame connected to the lifting hitch relative to the tractor based at least in part on the signal. Control systems and related methods are also disclosed.

An end effector leveling system for moving an end effector of a work machine with a boom assembly, a plurality of sensors, an input interface, and a controller. The plurality of sensors are configured to sense a current movement speed of the hoist boom, the stick boom, and the end effector. The input interface is configured to receive an end effector target angle input command for movement of the end effector at a constant target angle. The controller receives command signals from the input interface, determines based on the command signals a target tilt actuator velocity for actuating the tilt actuator, and an actual tilt actuator tilt velocity actuator and command the tilt actuator to move such that the end effector moves with an aggregate velocity derived from a weighting function of the target tilt actuator velocity and the actual tilt actuator velocity.

An agricultural machine comprises a carrier vehicle and an attachment is disclosed. The attachment is pivotably guided on the carrier vehicle about an axis extending in the direction of travel of the carrier vehicle. To the right and left of the axis, a support wheel is connected to the attachment via a damped, compressible arm. A control circuit is configured to decide whether a pivoting motion of the attachment about the axis is or is not desirable and, in the case that the pivoting motion is desirable, the arm that is compressed by the pivoting motion is switched from a strongly dampened compressible state to a substantially undampened state.