A work machine determines, when a request to restart an engine is made, whether or not a reason indicated by stop information stored in a memory is a reason related to locking of the work portion. The machine sets an operation mode of the engine and a work portion to a safe mode if it determines that the reason indicated by the stop information is a reason related to locking of the work portion. The safe mode is an operation mode for lessening damage resulting from causing the engine and the work portion to work during the work portion locked or damage resulting from an object coming into contact with the work portion during the engine and the work portion working.

A work machine determines, when a request to restart an engine is made, whether or not a reason indicated by stop information stored in a memory is a reason related to locking of the work portion. The machine sets an operation mode of the engine and a work portion to a safe mode if it determines that the reason indicated by the stop information is a reason related to locking of the work portion. The safe mode is an operation mode for lessening damage resulting from causing the engine and the work portion to work during the work portion locked or damage resulting from an object coming into contact with the work portion during the engine and the work portion working.

A system and method for an autonomous lawn mower comprising a mower body having at least one motor arranged to drive a cutting blade and to propel the mower body on an operating surface via a wheel arrangement, wherein the mower body includes a navigation system arranged to assist a controller to control the operation of the mower body within a predefined operating area.

A system and method for an autonomous lawn mower comprising a mower body having at least one motor arranged to drive a cutting blade and to propel the mower body on an operating surface via a wheel arrangement, wherein the mower body includes a navigation system arranged to assist a controller to control the operation of the mower body within a predefined operating area.

An agricultural machine (10) or, particularly, a mower for an agricultural machine includes a primary frame (13), a mowing unit (14) mounting a cutterbar therein, an adjustable element (17) and a tilt sensor (19). The adjustable element is adjustable in response to a signal from the sensor to re-configure a mowing angle between the cutterbar and/or mowing unit and a ground surface. Such reconfiguration results in adjusting an effective stubble height of the mower. The adjustable element may be positioned between the primary frame (13) and the agricultural machine (10) or between the primary frame (13) and the mowing unit (14). In the latter case the adjustable element (17) provides independent adjustment of a tilt angle of the mowing unit to a primary actuator (A).

An agricultural machine (10) or, particularly, a mower for an agricultural machine includes a primary frame (13), a mowing unit (14) mounting a cutterbar therein, an adjustable element (17) and a tilt sensor (19). The adjustable element is adjustable in response to a signal from the sensor to re-configure a mowing angle between the cutterbar and/or mowing unit and a ground surface. Such reconfiguration results in adjusting an effective stubble height of the mower. The adjustable element may be positioned between the primary frame (13) and the agricultural machine (10) or between the primary frame (13) and the mowing unit (14). In the latter case the adjustable element (17) provides independent adjustment of a tilt angle of the mowing unit to a primary actuator (A).

A garden tool includes a cutting assembly, a first driving device and a height adjustment assembly. The first driving assembly includes a prime mover fixedly mounted on a tool body and a transmission mechanism that transmits power output by the prime mover to the cutting assembly. The transmission mechanism is used to transmit the power output by the prime mover to the cutting assembly to drive the cutting assembly to work. The height adjustment assembly is used to drive the cutting assembly to move in a direction perpendicular to a working plane, so as to adjust a distance of the cutting assembly from the ground. The garden tool of the disclosure directly adjusts a height of a mower from the ground through the height adjustment assembly without adjusting a position of a heavy motor.

A garden tool includes a cutting assembly, a first driving device and a height adjustment assembly. The first driving assembly includes a prime mover fixedly mounted on a tool body and a transmission mechanism that transmits power output by the prime mover to the cutting assembly. The transmission mechanism is used to transmit the power output by the prime mover to the cutting assembly to drive the cutting assembly to work. The height adjustment assembly is used to drive the cutting assembly to move in a direction perpendicular to a working plane, so as to adjust a distance of the cutting assembly from the ground. The garden tool of the disclosure directly adjusts a height of a mower from the ground through the height adjustment assembly without adjusting a position of a heavy motor.

A robotic garden tool having a deck, a blade, a motor, and a blade height adjustment mechanism. The blade is movably coupled to the deck. The motor is configured to move the blade about an axis of rotation, and the axis of rotation defines an axial direction. The blade height adjustment mechanism includes a manual actuator configured to move in response to manual actuation by an operator. The manual actuator is operably coupled to a cam interface. The cam interface is disposed within a cylindrical volume defined circumferentially by the cam interface and bounded axially by upper and lower distal ends of the cam interface. The axis of rotation of the blade intersects the cylindrical volume. The blade is configured to move at least partially in the axial direction in response to movement of the manual actuator.

A robotic garden tool having a deck, a blade, a motor, and a blade height adjustment mechanism. The blade is movably coupled to the deck. The motor is configured to move the blade about an axis of rotation, and the axis of rotation defines an axial direction. The blade height adjustment mechanism includes a manual actuator configured to move in response to manual actuation by an operator. The manual actuator is operably coupled to a cam interface. The cam interface is disposed within a cylindrical volume defined circumferentially by the cam interface and bounded axially by upper and lower distal ends of the cam interface. The axis of rotation of the blade intersects the cylindrical volume. The blade is configured to move at least partially in the axial direction in response to movement of the manual actuator.