A lawn mower includes a blade assembly configured to perform a cutting function. The blade assembly includes an upper blade mounted about a blade rotation axis and an upper blade proximal portion being substantially flat and including a first cutting edge. A lower blade is mounted in overlap with the upper blade about the blade rotation axis. The lower blade includes a lower blade proximal portion positioned outward from the lower blade mounting portion in a radial direction, a lower blade end portion positioned outward from the lower blade proximal portion and below the lower blade proximal portion, and a second cutting edge. A lower blade falling portion transitions from the lower blade proximal portion to the lower blade end portion.

Outdoor power equipment includes a frame, a power head, a hydrostatic transmission, a pair of rear drive wheels, a drive chain, and a wheel height adjustment mechanism. The hydrostatic transmission includes a drive gear configured to rotate about a first axis. The pair of rear drive wheels are coupled at respective ends of a rear drive axle, wherein the rear drive axle is operably coupled to a driven gear. The pair of rear drive wheels, the rear drive axle, and the driven gear are configured to rotate about a second axis. The drive chain is operably coupled to both the drive gear and the driven gear. The wheel height adjustment mechanism includes a first bell crank pivotally coupled to the frame about the first axis, with a first end of the first bell crank being coupled to the rear drive axle.

A method navigates a robotic mower (2) by means of a wire (8). The robotic mower (2) comprises at least two sensors (12; 14). The method comprises detecting (S101), by means of the at least two sensors (12, 14), at least one signal from the wire (4a; 8; 10), measuring (S102) a polarity of the at least one signal of the wire (4a; 8; 10) by means of each one of the at least two sensors (12, 14), determining (S103) a direction based on the polarities measured by means of the at least two sensors (12, 14) and turning (S104) the robotic mower (2) towards the determined direction.

The present invention provides a robot gardening tool system and a method for a robot gardening tool. The robot gardening tool system comprises a robot gardening tool and a boundary module. The boundary module delimits a work area and/or a non-work area of the robot gardening tool, and the boundary module comprises at least one boundary element. The robot gardening tool comprises a boundary detection apparatus, a jamming detection apparatus and a control apparatus. The boundary detection apparatus detects the at least one boundary element; the jamming detection apparatus judges whether the robot gardening tool is jammed based on a feedback signal S.sub.i of the boundary detection apparatus; and the control apparatus controls the robot gardening tool to perform an extrication operation when the robot gardening tool is jammed. The present invention also provides a method for a robot gardening tool. The robot gardening tool system and method for a robot gardening tool according to the present invention enable effective detection of jamming, reduce misjudgements, and can perform effective operations on work areas where jamming is likely.

A mower cutting unit lift system includes a rotary motor connected to a power supply and turning an output shaft connected to a bell crank. A flexible link between the bell crank and a lift arm is used to lift a cutting unit to a transport position if the rotary motor turns the output shaft and the bell crank in a first direction, and lower the cutting unit to a mowing position if the rotary motor turns the output shaft and the bell crank in a second direction.

A stand on mower operator station includes a leaning pad having an upright position on a stand on mower, and a foot platform connected to the leaning pad. A dampening member allows the leaning pad and foot platform to move vertically together and absorbs shocks encountered by the stand on mower.

An outdoor power equipment unit, such as a lawn mower, includes a frame movable over the ground. A handle assembly is provided on the frame to allow an operator to walk on the ground behind the handle assembly while operating the unit. A traction drive and a ground grooming or working implement are carried on the frame. A traction control hand grip and an implement control bail are carried on the handle assembly. Both the hand grip and the bail are movable relative to the handle assembly by flexure provided by first and send compliant mechanisms.

Provided is an accommodation device capable of transporting a work vehicle(s) smoothly. The accommodation device is configured to accommodate a plurality of work vehicles that carry out a work while traveling autonomously, including a plurality of accommodation cases mounted on a load carrying bed of a transporter vehicle being capable of accommodating the plurality of work vehicles individually, a supporting section for supporting the plurality of accommodation cases respectively with allowing movement thereof along a preset path, an actuator for driving the supporting section for causing the accommodation cases to move along the path, and an electric generator for supplying electric power to the actuator.

An agricultural machine, comprising is disclosed, wherein the machine comprises a body frame; a cutting system mounted on the body frame; a drive system mounted on the body frame; a power unit, mounted on the body frame, adapted to provide power to the drive system and/or the cutting system; and a fluid distribution system adapted to provide fluid to the power unit. The fluid distribution system further comprises a dock and a replaceable fluid container adapted to contain fluid to be supplied to the power unit the dock being adapted to retain the replaceable fluid container in fluid communication with the fluid distribution system so as to supply fluid from the replaceable fluid container via the fluid distribution system to the power unit. A method of facilitating an oil change in an agricultural machine is also disclosed.

A method navigates a robotic mower by means of a wire. The robotic mower comprises at least one sensor. The method comprises detecting, by means of the at least one sensor, at least one signal from the wire, controlling the robotic mower to align with the wire, controlling the robotic mower to turn by an angle with respect to a section of the wire, controlling the robotic mower to increase the distance between the robotic mower and the wire by driving a displacement distance based on a random distance value, measuring, by means of the at least one sensor, a signal level of the at least one signal from the wire, and controlling the robotic mower to follow the wire based on the measured signal level.